JP7577375B2 - Real estate information processing device, real estate information search device, method, and computer program - Google Patents

Description

The present invention relates to a technology for searching for buildings that can be built on a specified piece of land, or land on which a specified building can be built.

Recently, the construction industry has been hit by negative factors such as the consumption tax hike and rising material costs due to the weak yen, but sales of detached houses and residential land are still being boosted by various subsidies and mortgage interest rates that are at record lows.

Generally, when a home builder sells a house to a customer, in the case of a custom-built home, the customer specifies the desired floor plan from among the floor plans proposed by the home builder, and the home builder searches for land on which a building with the specified floor plan can be built. However, each piece of land has its own building conditions, such as floor-to-area ratio and floor-area ratio, so it is difficult for customers who are not familiar with such things to find land on which a building with a specified floor plan can be built. On the other hand, even if the home builder searches for land, it is time-consuming to find the land while understanding the customer's detailed wishes, such as the surrounding environment.

In addition, when purchasing a building or land, one imagines in advance what the building will look like after purchase, but it is difficult for inexperienced individual buyers to accurately recognize the actual image. In particular, it is difficult to imagine how the line of sight and sunlight will reach the inside of the building after it is constructed, and it is not rare for people to become confused only when they actually start living in the building.
Therefore, when purchasing a building or land, if the buyer can accurately recognize the image of the building constructed on the land, the buyer can enter into a purchase contract for real estate such as buildings and land with peace of mind. Also, if it is possible to search for real estate in which one can live comfortably while taking into account the line of sight from outside the building, which is difficult to imagine, such a search system would be very convenient for those looking for real estate.

JP 2007-316819 A JP 2001-325321 A JP 2003-216976 A JP 2018-092503 A

The above patent document proposes a system that determines whether a building with a specified floor plan can be built on a specified piece of land based on information such as the floor area ratio and building coverage ratio of a house, and evaluates the building based on sunlight, etc.
However, there is no system that efficiently searches for a building suitable for construction on a specified piece of land, or for a piece of land suitable for construction of a specified building, taking into consideration the line of sight from outside the building to the inside of the building, based on a concrete image of what the building will look like on the land.

The present invention aims to provide a device that efficiently searches for a building suitable for construction on a given piece of land, or a piece of land suitable for construction of a given building, taking into account the line of sight from outside the building into the building, based on a concrete image of what the building will look like on the piece of land.

In order to achieve the above object, a real estate information search device according to one aspect of the present invention is a device that proposes buildings that can be built on a specified piece of land, and includes a land information storage means that stores information about the specified piece of land, a surrounding environment information storage means that stores information about the surrounding environment of the specified piece of land, a building information storage means that stores at least window information about the layout of windows in the building as information about the building to be built on the land, and a search processing means that searches for buildings that are candidates to be built on the specified piece of land, and the search processing means is composed of a viewpoint setting function unit that refers to the surrounding environment information storage means and sets a virtual viewpoint as a base point from which a line of sight is directed toward the building when the building is built on the specified piece of land, and a first discrimination function unit that compares the direction and angle of the line of sight that reaches the building through the windows of the building from the viewpoint as a virtual base point outside the building with a predetermined threshold value to determine whether or not the building is suitable for construction when the building is built on the specified piece of land.

The building information storage means may store change allowance information relating to the range of changes that can be made to the layout of the windows of the building, and the first determination function unit constituting the search processing means may refer to the building information storage means and determine whether or not the building is suitable for construction within the range of changes that can be made to the layout of the windows.

The building information storage means may store information on the layout of the building that can be adjusted according to the conditions of the land when the building is constructed on the land, and the search processing means may further include as a component a second determination function unit that refers to the building information storage means and determines whether or not the building can be constructed within the range of the layout that can be adjusted for the building according to the conditions of the specified land.

The system may further include an order setting means for setting a recommended order for the search results of the building according to the amount of line of sight reaching inside the building.

The system may further include a synthesis processing means for generating a synthetic image by synthesizing a three-dimensional image of the building with a three-dimensional image of the surrounding environment of the specified land.

The system may further include a generation processing means for generating a three-dimensional image of the surrounding environment of the specified land from a photographed image of the surrounding environment of the specified land.

The system may further include a processing means for determining the direction and angle of the line of sight reaching the interior of the building through a window of the building from a viewpoint serving as a virtual standpoint outside the building when the building is constructed on a specified piece of land based on the composite image.

The viewpoint setting function unit may further identify a specified object contained in the three-dimensional image of the surrounding environment of the specified land, and set a virtual viewpoint at the location of the specified object as a base point from which to direct the line of sight toward the building.

The device may further include a first display processing means for displaying an image in which a predetermined standpoint is used as a virtual viewpoint in the composite image.

The system may further include a second display processing means for displaying an image of sunlight entering the building through the window in the composite image.

In addition, a real estate information search method according to another aspect of the present invention is a method for proposing buildings that can be built on a specified piece of land, in which a computer having a land information storage means for storing information about the specified piece of land, a surrounding environment information storage means for storing information about the surrounding environment of the specified piece of land, and a building information storage means for storing at least window information about the window layout of the building as information about the building to be built on the land executes a search process for searching for buildings that are candidates for building on the specified piece of land, and the search process is composed of a viewpoint setting process for setting a virtual viewpoint as a base point from which a line of sight is directed toward the building when the building is built on the specified piece of land, by referring to the surrounding environment information storage means, and a discrimination process for comparing the direction and angle of the line of sight that reaches the building through the windows of the building from the viewpoint as the virtual base point outside the building with a predetermined threshold value when the building is built on the specified piece of land to determine whether or not the building is suitable for construction.

In addition, a computer program according to another aspect of the present invention is a computer program for proposing buildings that can be built on a specified piece of land, which causes a computer having a land information storage means for storing information about the specified piece of land, a surrounding environment information storage means for storing information about the surrounding environment of the specified piece of land, and a building information storage means for storing window information about at least the window layout of the building as information about the building to be built on the land to execute a search process for searching for buildings that are candidates for building on the specified piece of land, and the search process is composed of a viewpoint setting process for setting a virtual viewpoint as a base point from which a line of sight is directed toward the building when the building is built on the specified piece of land, by referring to the surrounding environment information storage means, and a discrimination process for determining the suitability of building the building based on the direction and angle of the line of sight that reaches the building through the windows of the building from the viewpoint as the virtual base point outside the building, when the building is built on the specified piece of land, by comparing it with a predetermined threshold value.

In addition, a real estate information search device according to another aspect of the present invention is a device that proposes land on which a specified building can be built, and includes a land information storage means that stores information about the land, a surrounding environment information storage means that stores information about the surrounding environment of the land, a building information storage means that stores at least window information about the window layout in the building as information about the specified building, and a search processing means that searches for land on which the specified building can be built. The search processing means is composed of a viewpoint setting function unit that references the surrounding environment information storage means and sets a virtual viewpoint as a base point from which the specified building is built on the land, and a discrimination function unit that compares the direction and angle of the line of sight from the viewpoint as a virtual base point outside the building to the inside of the building through the windows of the building with a predetermined threshold value to determine whether or not the building can be built on the land.

In addition, a real estate information search method according to another aspect of the present invention is a method for proposing land on which a specified building can be built, in which a computer having a land information storage means for storing information on the land, a surrounding environment information storage means for storing information on the surrounding environment of the land, and a building information storage means for storing, as information on the specified building, at least window information related to the window layout of the building, executes a search process for searching for land on which the specified building can be built, and the search process is composed of a viewpoint setting process for setting a virtual viewpoint as a standpoint from which the specified building is to be built on the land, by referring to the surrounding environment information storage means, and a determination process for determining whether or not the specified building can be built on the land, based on the direction and angle of the line of sight that reaches the building through the windows of the building from the viewpoint as the virtual standpoint outside the building, when the specified building is built on the land, by comparing it with a predetermined threshold value.

In addition, a computer program according to another aspect of the present invention is a computer program for suggesting land on which a specified building can be built, which causes a computer having a land information storage means for storing information on the land, a surrounding environment information storage means for storing information on the surrounding environment of the land, and a building information storage means for storing, as information on the specified building, at least window information related to the window layout of the building, to execute a search process for searching for land on which the specified building can be built, and the search process is composed of a viewpoint setting process for setting a virtual viewpoint as a standpoint from which the specified building is to be built on the land, by referring to the surrounding environment information storage means, and a discrimination process for comparing the direction and angle of the line of sight from the viewpoint as the virtual standpoint outside the building to the inside of the building through the windows of the building, with a predetermined threshold value, to determine whether or not the building can be built on the land.

According to the present invention, it is possible to search for buildings that can realistically be constructed on a given piece of land by taking into account the east-west, north-south orientation set for the building and the direction the road should face, and to propose all the building information resulting from the search in one place.
In addition, by taking into account the building's north-south, east-west orientation and the direction the road should face, the system searches for land on which the building can realistically be built, and then proposes all the land information as a result of the search.
Furthermore, in either case, it is possible to clearly display a concrete image of what the building will look like on the land.

1 is a functional block diagram showing functions of a real estate information search device according to a first embodiment of the present invention. FIG. 2 is a diagram showing an example of data stored in a land information storage unit in the real estate information search device according to the present embodiment. FIG. 2 is a diagram showing an example of data stored in a building information storage unit in the real estate information search device according to the present embodiment. FIG. 2 is a schematic diagram for explaining the concepts of a set direction and a land direction in the real estate information search device according to the present embodiment. FIG. 2 is a schematic diagram for explaining the concepts of road direction and road facing direction of a road in the real estate information search device according to the present embodiment. FIG. 1 is a schematic diagram showing a concept of a process for determining whether a building shape matches a land shape in a real estate information search device according to the present embodiment; FIG. 1 is a schematic diagram showing a concept of a process for determining whether a building shape matches a land shape in a real estate information search device according to the present embodiment; FIG. 1 is a schematic diagram showing a concept of a process for determining whether a building shape matches a land shape in a real estate information search device according to the present embodiment; FIG. 1 is a schematic diagram showing a concept of a process for determining whether a building shape matches a land shape in a real estate information search device according to the present embodiment; FIG. 1 is a schematic diagram illustrating a three-dimensional image of the surrounding environment around a specific piece of land in a real estate information search device according to this embodiment. FIG. 1 is a schematic diagram illustrating a state in which a three-dimensional image of a building is synthesized with a three-dimensional image of the surrounding environment around a specific piece of land in the real estate information search device according to the present embodiment. FIG. 1 is a schematic diagram illustrating a state in which a three-dimensional image of a building is synthesized with a three-dimensional image of the surrounding environment around a specific piece of land in the real estate information search device according to the present embodiment. FIG. 1 is a process flow diagram showing an overall flow of processing by a real estate information search device according to an embodiment of the present invention. 11 is a process flow diagram showing the flow of search processing by a second discrimination function unit, among the processes by the real estate information search device according to the present embodiment. FIG. 4 is a process flow diagram showing the flow of search processing by a first discrimination function unit, among the processes by the real estate information search device according to the present embodiment. FIG. 13 is a diagram showing an example of a screen displayed on a terminal when a searcher specifies land in the real estate information search device according to the present embodiment. FIG. 11 is a diagram showing an example of a screen showing search results in the real estate information search device according to the embodiment. FIG. 11 is a diagram showing an example of a screen showing search results in the real estate information search device according to the embodiment. FIG. FIG. 11 is a process flow diagram showing the overall flow of processing by a real estate information search device according to a second embodiment of the present invention. 11 is a process flow diagram showing the flow of search processing by a second discrimination function unit, among the processes by the real estate information search device according to the present embodiment. FIG. 4 is a process flow diagram showing the flow of search processing by a first discrimination function unit among the processes by the real estate information search device according to the present embodiment. FIG.

Hereinafter, a real estate information search device according to an embodiment of the present invention will be described with reference to the drawings.
The real estate information search device according to this embodiment is a device for searching for a building to be built on a specific piece of land or a piece of land for building a specific building. Specific usage scenarios are assumed to be that house manufacturers who sell buildings, particularly custom-built homes, and real estate businesses who sell land use the device to propose buildings and land to customers, and that those who are considering purchasing real estate use the device to search for real estate that meets their needs.

Functional Configuration The real estate information search device 1 according to the first embodiment shown in FIG. 1 searches for suitable buildings that can be constructed on a given piece of land.
The real estate information search device 1 is realized by a so-called server computer, and is configured to include functional blocks consisting of a land information storage unit 1A, a surrounding environment information storage unit 1B, a building information storage unit 1C, a search processing unit 11, a generation processing unit 12, a synthesis processing unit 13, a specific processing unit 14, an order setting unit 15, and a display processing unit 16, using hardware resources such as a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), and a hard disk drive, and software resources such as a computer program executed by the CPU.

・Land information storage unit 1A
The land information storage unit 1A is a storage unit that stores land information regarding land on which a building can be built, such as land owned by a customer or land sold to a customer by a real estate agent.
As shown in FIG. 2, for example, the land information storage unit 1A stores at least basic information and information related to land conditions in association with each land ID capable of individually identifying a plot of land.

The basic information is information about the land itself, and includes information about the land's address, price, etc. In addition, the basic information may include information about the neighborhood, such as the distance from the nearest station to the land and whether there is a supermarket nearby.
Land conditions are information required when constructing a building on land, and consist of, for example, the building coverage ratio, floor area ratio, lot area, land shape, land direction, road access direction, etc. These land conditions include information that can be used to determine whether or not there are physical or legal restrictions or regulations when constructing a building on the land.

The land shape is information related to the shape of the land, and it makes it possible to know what shape of building can be fitted on the site.
Land orientation is information related to the orientation of land, and it is possible to grasp which part of the land shape faces north, south, east or west.
The road facing direction is information about the direction of the road that the land faces.

Surrounding environment information storage unit 1B
The surrounding environment information storage unit 1B is a storage unit that stores information related to the surrounding environment of land.
This surrounding environment information storage unit 1B includes, for example, information on buildings and adjacent roads around a specific piece of land, and stores a three-dimensional image of the surrounding area centered on the specific piece of land.
The three-dimensional image of the surroundings centered on a specific piece of land may be registered in advance in the surrounding environment information storage unit 1B, or it may be generated from photographed images of the surroundings of the specific piece of land by the generation processing unit 12 described later and then registered.

The surrounding environment information may include a two-dimensional or three-dimensional map of the area around the land. A three-dimensional map refers to a map in which the individual pieces of land, buildings, etc. that make up the map have a three-dimensional image, allowing a specific location to be observed in three dimensions, as well as a map in which a specific location is observed in three dimensions from a specific angle. An example of a map in which a specific location is observed in three dimensions from a specific angle is a map based on STREET VIEW (registered trademark) provided by Google Inc., which is composed of photographs or images of the land, etc. taken by an observer from a road, etc.

Building information storage unit 1C
The building information storage unit 1C is a storage unit that stores building information related to buildings.
As shown in FIG. 3, for example, this building information storage unit 1C stores basic information about the building, building conditions, a three-dimensional image of the building, and window information in association with each other for each building ID that can individually identify a building.

The basic information is information about the building itself, and includes information about the building's supplier, price, floor plan, etc.
The building conditions are information required when constructing a building on land, and consist of the building area, total floor area, exterior shape, set direction, set direction tolerance, road direction, road direction tolerance, etc. These building conditions include information that can determine whether or not there are physical or legal restrictions or regulations when constructing a building on land.

The set direction is information related to the north, south, east and west directions set for the building, and is set in advance based on the direction from the center of the building's floor plan, etc. In practice, this set direction is determined by the location of the bathroom, the direction of windows in rooms, etc.
The set direction tolerance is information related to the angle by which the east-west-north-south orientation set for a building can be tilted or shifted. That is, as shown in Fig. 4, the set direction tolerance is the angle (allowable angle) by which the set direction of east-west-north-south set for each building can be tilted with respect to the land direction related to east-west-north-south of the land.
When constructing a specified building on a piece of land, the east-west-north-south orientation set on the building does not need to strictly match the actual east-west-north-south orientation, and deviations within a specified allowable angle range are permitted.

The road direction is information related to the direction in which the building faces the road, and is set in advance based on the direction from the center of the building layout, etc. In practice, this road direction is determined based on the location of the entrance, etc.
The road direction tolerance is information related to the angle by which the direction of the road set for the building can be shifted. That is, as shown in Fig. 5, the road direction tolerance is the angle (tolerable angle) by which the road direction set for each building can be tilted with respect to the road tangent direction of the land.

By comparing these building conditions with the land conditions of the land, it is possible to determine whether or not physical or legal restrictions can be met when constructing a specific building on a specific piece of land.

A three-dimensional image is data showing the three-dimensional shape of a building. By combining this three-dimensional image of the building with a three-dimensional image showing the surrounding environment of a given piece of land, a three-dimensional image of the given piece of land and the building constructed there is generated.
Furthermore, the three-dimensional image includes not only the exterior of the building but also the interior of the building, and by referring to the three-dimensional image of the interior, the layout of the interior of the building can be grasped in three dimensions.

The window information is information related to the windows of a building, and includes information related to the window layout and change permission information.
The layout is information that allows you to understand where in a building the windows are located and what size they are. By understanding the window layout, you can understand from where the line of sight coming from outside the building comes into the building.
The layout may also include information such as the specifications or supplier of the windows installed in the building.

The change allowance information is information about the range of changes that can be made to the window layout. In other words, it is information about the changeable positions and sizes of windows that are installed in a building by default, or about the standards of windows that can be replaced. By referring to this change allowance information, it is possible to understand how the windows that are installed in a building by default can be changed, and how making such changes will affect the line of sight reaching the inside of the building from outside.

Search processing unit 11
The search processing unit 11 executes a process of searching for buildings that are candidates for construction on a given piece of land.
The search processing section 11 is composed of a viewpoint setting function section 111, a first discrimination function section 112, and a second discrimination function section 113, and searches for buildings in response to a search request from a searcher or a search request from a predetermined system.

The viewpoint setting function unit 111 references the surrounding environment information storage unit 1B and sets a virtual viewpoint as a standpoint from which to direct the line of sight toward a building when the building is constructed on a specified piece of land. More specifically, it identifies a specified object contained in the three-dimensional image of the surrounding environment of the specified piece of land, and sets a virtual viewpoint at the position where the specified object is located. In addition, it sets a virtual viewpoint at a specified location in the three-dimensional image of the surrounding environment of the specified piece of land.

The predetermined object is, for example, an object or place where a person may be present and thus where a viewpoint can reasonably be assumed to be present, such as a window or balcony of a building built around a predetermined land, an exterior staircase or passageway in an apartment building, etc. The predetermined object is identified, for example, from a three-dimensional image based on a reference image stored in advance, or from an image obtained by flattening the three-dimensional image.
Further, the predetermined location is, for example, a location on a road around a predetermined piece of land, at a certain height from the ground, that is, a location corresponding to the height of a person's eye level.
By setting virtual viewpoints at specific objects or locations where it is reasonably assumed that a human viewpoint exists, it is possible to grasp the direction and angle of the line of sight that is expected to reach inside a building when the building is constructed on a specified piece of land.

When a building is constructed on a specified piece of land, the first discrimination function unit 112 determines whether or not it is appropriate to construct the building by comparing the direction and angle of the line of sight reaching into the building through the building's windows from a viewpoint serving as a virtual standing point outside the building with a specified threshold value.
That is, the identification processing unit 14, which will be described later, identifies how the line of sight reaches the inside of the building through the windows of the building from the virtual viewpoint set by the viewpoint setting function unit 111, based on the layout information of the windows of the building stored in the building information storage unit 1C. The first discrimination function unit 112 compares the direction and angle of the line of sight reaching the inside of the building through the windows with a predetermined threshold based on this line of sight information. The threshold is set, for example, so that angles up to a certain angle from the angle at which the line of sight enters the building from directly in front of the window are unacceptable, or in terms of vertical angles, the angle of the line of sight entering from below in the vertical direction is permitted, while the angle of the line of sight entering from the vertical direction information is unacceptable. If the angle is permitted in comparison with such a threshold, the architecture of the building is determined to be appropriate.
It should be noted that a predetermined threshold value can be set not only for the direction and angle of the line of sight, but also for the distance from the viewpoint to the window, and a setting may be made so that a viewpoint farther than a certain distance is permitted.

In addition, the first discrimination function unit 112 refers to the building information storage unit 1C and discriminates the suitability of the construction of the building within the range of the layout that can be changed for windows.
That is, the identification processing unit 14 described later can identify how the angle and direction of the line of sight reaching inside the building from a virtual viewpoint changes when the default window positions and sizes of the building are changed within a changeable range. Even if the default window positions and sizes of the building are not acceptable in comparison with a predetermined threshold, if the line of sight angle and direction after the change are acceptable in comparison with the predetermined threshold based on information related to the line of sight angle and direction after the change, the first discrimination function unit 112 determines that the architecture of the building is appropriate.

The second discrimination function unit 113 judges whether the buildings stored in the building information storage unit 1C have basic information that matches the search conditions arbitrarily specified by the searcher or a specified system, and further whether they have building conditions that match the land conditions of a specified piece of land specified by the searcher or a specified system.

When searching for a building that matches the land conditions of a specified piece of land, the second discrimination function unit 113 determines whether or not the building stored in the building information storage unit 1C will fit on the specified piece of land, based on its external shape and the land shape of the specified piece of land, with the land direction of the specified piece of land matching the set direction set for the building. Furthermore, when determining whether or not a building will fit on a specified piece of land, it can determine whether or not it will fit with the set direction of the building tilted within an acceptable angle range.

This process will be described with reference to Figures 6 and 7. In this example, first, as shown in Figure 6(a) or Figure 7(a), the exterior shape of the building stored in the building information storage unit 1C is applied to the land shape of a specified piece of land by matching the set direction previously set for the building with the land direction of the land. At this time, if the exterior shape of the building fits into the land shape while the land direction of the land and the set direction of the building are matched, the building is treated as satisfying the search conditions in this process.

On the other hand, if the exterior shape of the building does not fit within the shape of the land when the land direction of the land and the set direction of the building are matched, then the set direction is tilted within the allowable angle range, as shown in Figure 6(b) or Figure 7(b), and it is determined whether the exterior shape of the building fits within the shape of the land. As a result, if the exterior shape of the building fits within the shape of the land, as in Figure 7(b), the building is treated as satisfying the search conditions in this process. On the other hand, if the exterior shape of the building still does not fit within the shape of the land, as in Figure 6(b), the building is treated as not satisfying the search conditions.

The second discrimination function unit 113 also determines whether a building stored in the building information storage unit 1C can fit on a specified piece of land when the road access direction of the specified piece of land matches the road direction of the building. When determining whether a building can fit on a specified piece of land, it can further determine whether the building can fit on the specified piece of land when the road direction of the building is tilted within an acceptable angle range.

This process will be described with reference to Figures 8 and 9. In this example, first, as shown in Figure 8(a) or Figure 9(a), the exterior shape of the building stored in the building information storage unit 1C is applied to the land shape of a specified piece of land by matching the road direction previously set for the building with the road access direction of the specified piece of land. At this time, if the exterior shape of the building fits into the land shape while matching the road access direction of the specified piece of land with the road direction of the building, the building is treated as satisfying the search conditions in this process.

On the other hand, if the exterior shape of the building does not fit within the land shape when the road access direction of the land and the road direction of the building are aligned, then the road direction of the building is tilted within the allowable angle range, as shown in Figure 8(b) or Figure 9(b), and a determination is made as to whether the exterior shape of the building fits within the land shape. As a result, if the exterior shape of the building fits within the land shape, as in Figure 9(b), the building is treated as satisfying the search conditions in this process. On the other hand, if the exterior shape of the building still does not fit within the land shape, as in Figure 8(b), the building is treated as not satisfying the search conditions.

Generation processing unit 12
The generation processing unit 12 generates a three-dimensional image of the surrounding environment of a specific piece of land from a captured image of the surrounding environment of the specific piece of land.
Although there is no particular limitation on the method of generating a three-dimensional image by the generation processing unit 12, for example, a three-dimensional image can be generated by flying a drone equipped with an omnidirectional camera at a certain height at a specific land or its surroundings, and synthesizing the captured images. Also, a three-dimensional image can be generated by synthesizing two-dimensional images captured from multiple points according to the coordinates of the points at which the captured images were captured and information related to the capture direction.

Synthesis processing unit 13
The synthesis processing unit 13 executes a process of synthesizing a three-dimensional image of a building with a three-dimensional image of the surrounding environment of a specified piece of land, thereby generating a three-dimensional synthesized image in which the specified land and the building are integrally represented.
A specific example of this process is shown in Figures 10 and 11. Figure 10 shows a three-dimensional image of a given piece of land and its surrounding environment. In the figure, the part shown as an empty lot is the "given piece of land" referred to here.
Here, the synthesis processing unit 13 refers to the building information storage unit 1C and synthesizes the three-dimensional image of the building with the photographed image or image of the specified land. Figure 11 shows the three-dimensional image generated in this way, in which the building is three-dimensionally superimposed on the specified land.

The three-dimensional image is generated by matching the road access direction and land direction of the land, and the road direction and set direction of the building. If the building fits on the land by changing the angle of the road direction and set direction of the building within the allowable angle range, the angle of the building relative to the land is changed within the allowable angle range, and a three-dimensional image of the building fitting on the land is generated.

Furthermore, this three-dimensional image may be viewable from various angles based on the operation of the user on the user terminal 2. In this case, the output of the screen on the user terminal 2 is specifically realized by Ajax or the like.
In addition, as shown in FIG. 12, this three-dimensional image may be made so that optional parts such as cars (as well as plants, fences, and other things that are attached to a building) can be freely selected and placed.

Specific processing unit 14
The identification processing unit 14 identifies the direction and angle of the line of sight that reaches the inside of a building through a window of the building from a viewpoint serving as a virtual standpoint outside the building when the building is constructed on a specified piece of land, based on the composite image generated by the synthesis processing unit 13. For example, the direction and angle of the line of sight are identified by connecting the virtual viewpoint and the outer edge of a window having a certain area with a straight line and determining the angle formed by the straight line and the window or the window and a virtual straight line perpendicular to the window.
In addition, the specific processing unit 14 can also determine how the direction and angle of the line of sight reaching inside the building from a virtual viewpoint changes when the position and size of the building's default windows are changed within a changeable range.

Furthermore, the identification processing unit 14 can set the origin of sunlight entering the building through the window to a predetermined position, and identify the direction and angle of the sunlight entering the building from the predetermined position. By identifying the direction and angle of the sunlight, it is possible to grasp what kind of sunlight is brought into the building through the window.
The position that is the origin of sunlight can be set according to information such as the season, time of day, and the location of a specific piece of land.

Order setting unit 15
The order setting unit 15 can set the order in which buildings are recommended based on the search results for buildings on a given piece of land, by a qualitative evaluation that takes into consideration each of a given item or a comprehensive set of the given items.
For example, the range of the inside of the building visible from outside the building can be quantified as the amount of gaze based on the direction and angle of the gaze reaching the inside of the building through a window from a virtual viewpoint identified by the identification processing unit 14, and the recommendation order according to the amount of gaze can be reflected in the search result. In addition, for example, the recommendation order according to the amount of change when the position or size of a window is changed within a changeable range, or the amount of change when the direction of a building relative to a specified land is changed within an allowable range, can also be reflected in the search result.

Display processing unit 16
The display processing unit 16 can generate an image in which a predetermined point is used as a virtual viewpoint in the three-dimensional composite image, and display this on a predetermined display device such as a display. The virtual viewpoint is set arbitrarily, for example, by a searcher or a user of the real estate information search device 1. By referring to the image from the arbitrarily set virtual viewpoint, the user can intuitively grasp from where and how the line of sight will enter the building when a building is constructed on a predetermined piece of land, or how the building will look from outside the building.

The display processing unit 16 can also display an image of sunlight entering the building through the windows in the three-dimensional composite image. The angle and direction of the sunlight can be identified by the identification processing unit 14, and the range within the building that the sunlight reaches can be reflected and displayed on the composite image based on the identified angle and direction of the sunlight and the window information of the building.

In addition, in the real estate information search device 1 constituting the above-mentioned functional unit, a specified terminal configured to be capable of communicating via a network such as the Internet can be provided, and the execution results of the functions provided by the real estate information search device 1 can be obtained by the specified terminal. Such a specified terminal is, for example, configured as a so-called personal computer, a tablet-type or portable terminal capable of sending and receiving data, etc., and has a communication processing unit such as a web browser that executes data sending and receiving processing, and an input/output processing unit such as a display for inputting and outputting data, a touch panel, or a keyboard.

Processing Flow Next, a series of processes executed by the real estate information search device 1 according to this embodiment will be described.
First, FIG. 13 shows the overall flow of processing for searching for a building that can be constructed on a given piece of land.
The real estate information search device 1 receives a request to search for a building that can be constructed on a specific piece of land together with the designation of the specific piece of land (S101).
In response to this, the search processing unit 11, through the second discrimination function unit 113, refers to the land information memory unit 1A and the building information memory unit 1C, and searches for buildings that can be constructed on the specified land based on the basic information and conditions of the specified land and building (S102).
Furthermore, for the buildings narrowed down by the second discrimination function unit 113, the search processing unit 11 uses the first discrimination function unit 112 to refer to the land information memory unit 1A and the building information memory unit 1C to search for buildings whose construction can be determined to be appropriate based on the line of sight reaching the inside of the building from outside the building (S103).
As a result of the above search processing by the search processing unit 11, buildings that are determined to be suitable for construction are presented as search results (S104).

In the above search process, the buildings to be searched are narrowed down by the second discrimination function unit 113, and then the buildings are further narrowed down by the first discrimination function unit 112. However, regardless of the order of processing by the first discrimination function unit 112 and the second discrimination function unit 113, the buildings to be searched may be narrowed down further by the second discrimination function unit 113 after the first discrimination function unit 112 narrows down the buildings to be searched.

In addition, the designation of a specific land may be performed, for example, by displaying a map in which the land is partitioned by referring to the land information in the land information storage unit 1A and map information around the land (which may be stored in a map information storage unit), as shown in FIG. 16, and the user may designate the specific land from the map. In another example, an address may be input from a specific input form, and the land specified by the address may be designated. In this case, together with the designation of the land, it is also possible to accept the designation of conditions based on basic information of the building, so that the user can narrow down the buildings by the price range or the manufacturer of the building that he or she desires in advance. In addition, the price as a search condition may be selected as the total price of the land designated by the user and the construction cost of the building.
In addition, the designation of a specific piece of land is not limited to being made by a user, but may also be made by a real estate information search device designating a specific building on a specific website, etc., in order to propose a building to a user as an advertisement, and requesting a search for buildings that can be constructed on the specific building.

Next, the process of S102 will be described in detail with reference to FIG.
First, the second discrimination function unit 113 of the search processing unit 11 judges whether the buildings stored in the building information storage unit 1C have basic conditions that match the basic information of a specified land (S201). Furthermore, it narrows down the buildings that have building conditions that match the land conditions of the land (S202). Here, information such as the building coverage ratio and floor area ratio determined for each land is compared with information such as the site area and building area of each building, and buildings that can be built on the specified land are narrowed down without exceeding the restrictions such as the building coverage ratio and floor area ratio.

Then, the second discrimination function unit 113 further determines whether the building shape of the building narrowed down as described above fits within the land shape when the land direction of the specified land is matched with the set direction of the building (S203).
In addition, if the shape of the building does not fit within the shape of the land when the land direction of the land and the set direction of the building are matched, the building is tilted within an allowable angle range for the set direction set for the building to determine whether the shape of the building fits within the shape of the land (S204).

As a result, if the shape of the building does not fit within the land shape even within the range of allowable angles set for the building, the building is treated as not satisfying the search conditions.
On the other hand, in the processing of S203, if the shape of the building fits within the shape of the land when the land direction of the land and the set direction of the building are matched, and in the processing of S204, if the shape of the building fits within the shape of the land when the set direction of the building is tilted within the range of the allowable angle, the building is judged to satisfy the search conditions in the processing by the second discrimination function unit 113.

The second discrimination function unit 113 then goes on to determine whether the building shape of the building narrowed down as described above fits within the shape of the land when the road access direction of the land specified by the user matches the road direction of the building (S205).
Furthermore, if the shape of the building does not fit within the shape of the land when the road access direction of the land and the road direction of the building are aligned, the road direction of the building is tilted within the allowable angle range and it is determined whether the shape of the building fits within the shape of the land (S206).

As a result, if the shape of the building does not fit within the land shape even within the range of allowable angles set for the building, the building is treated as not satisfying the search conditions.
On the other hand, in the processing of S205, if the building shape of the building fits within the land shape when the road access direction of the land and the road direction of the building are aligned, and in the processing of S206, if the building shape of the building fits within the land shape when the road direction of the building is tilted within the allowable angle range, the building is judged to satisfy the search conditions in the processing by the second discrimination function unit 113.

The order of the processing based on the basic conditions in S201, the processing based on the land conditions and building conditions in S202, the processing based on the set direction of the building in S203 and S204, and the processing based on the road direction of the building in S205 and S206 is not limited to the order described in this example, and may be executed in an order different from that in this example. Also, it is possible to execute only one or a part of these processes.

Next, the process of S103 will be described in detail with reference to FIG.
The generation processing unit 12 references the surrounding environment information storage unit 1B and generates a three-dimensional image of the surrounding environment of a specific piece of land from a captured image of the surrounding environment of the specific piece of land (S301).
In response to this, the synthesis processing unit 13 synthesizes the three-dimensional image of the building with the three-dimensional image of the surrounding environment of the specified land to generate a three-dimensional synthesized image in which the specified land and the building are integrally represented (S302). As a result, a three-dimensional image in which the building is three-dimensionally superimposed on the specified land is generated.

The viewpoint setting function unit 111 identifies a predetermined object included in the three-dimensional image of the surrounding environment of the predetermined land (S303). That is, the predetermined object is identified as an object or place where a person may be present, such as a window or an exterior staircase of a building built around the predetermined land, and therefore where a viewpoint may reasonably be considered to be present.
The viewpoint setting function unit 111 sets a virtual viewpoint at a predetermined location including the predetermined object (S304). These virtual viewpoints are objects or locations that can be reasonably considered to be human viewpoints, and by setting such virtual viewpoints, it is possible to grasp the direction and angle of the line of sight that is expected to reach inside a building when the building is constructed on a predetermined piece of land.

Based on the window layout stored in the building information memory unit 1C, the first discrimination function unit 112 determines whether the direction and angle of the line of sight reaching the inside of the building through the windows of the building from a viewpoint serving as a virtual standing point outside the building, when a building is constructed on a specified piece of land, is within an acceptable range by comparing it with a specified threshold value (S305).
As a result, if the direction and angle of the line of sight from the virtual viewpoint are within a permissible range, the image is treated as satisfying the search conditions.

On the other hand, in S305, if the direction and angle of the line of sight from the virtual viewpoint are not within the acceptable range, the first discrimination function unit 112 refers to the window change tolerance information stored in the building information memory unit 1C, and changes the window layout within the acceptable range to determine whether the direction and angle of the line of sight from the virtual viewpoint to the inside of the building are within the acceptable range by comparing them with predetermined thresholds (S306).
As a result, if changing the window layout within the allowable range brings the line of sight direction and angle from the virtual viewpoint within the allowable range, the search condition is treated as being met. On the other hand, if changing the window layout within the allowable range does not bring the line of sight direction and angle from the virtual viewpoint within the allowable range, the search condition is treated as not being met.

Display of Search Processing Results The results of the above search processing are presented, for example, as shown in the example in Fig. 17. Note that the example in Fig. 17 shows the results of a search for buildings that can be constructed on a specific piece of land specified by a user on a specific website or terminal.
In this example, the top three buildings that can be constructed on a given piece of land are displayed in a list in the order of recommendation set by the order setting unit 15. The three buildings are displayed as three-dimensional images 101, 102, and 103 arranged on a given piece of land, respectively, and the three-dimensional images 101, 102, and 103 displayed in the list can be selected to be displayed enlarged in the enlarged display field 104. Note that the example of Fig. 17 shows a case where the three-dimensional image 101 is enlarged and displayed in the enlarged display field 104, and the three-dimensional image 101 displayed in the list can be seen to have been selected by being displayed with a dotted line.

When each of the three-dimensional images 101, 102, and 103 is a three-dimensional image of a building that is deemed to be a constructable building as a result of changing the set direction of the building or the road direction within an allowable range and/or changing the window layout of the building within an allowable range, the three-dimensional image may be a composite image that is displayed with the set direction, road direction, and window layout changed.
Furthermore, the three-dimensional image 101 in the enlarged display field 104 can be rotated, enlarged, reduced, or the like by a predetermined operation, and can be viewed from various angles.

Each of the three-dimensional images 101, 102, 103 is provided with building evaluation information 101a, 102a, 103a divided into predetermined categories. The predetermined categories are, for example, budget, sunlight, eyes, layout, area, openness, etc., which may affect the purchase of a particular piece of land or building by a prospective buyer. The eyes category allows one to grasp the number of gazes and the extent and nature of viewpoints such as windows and balconies of other buildings in the vicinity, while the openness category allows one to grasp whether or not there are many houses crowded together in the neighborhood.
In this example, the qualitative evaluation of each item is indicated by the number of stars. For example, the evaluation criteria may be that the lower the price is for the budget, the higher the evaluation, and for sunlight, the larger the area on the building that can ensure sunlight, the higher the evaluation. In addition, for human eyes, the lower the amount of gaze reaching the building through the windows of the building, based on the direction and angle of the gaze from a virtual viewpoint, the higher the evaluation.

The recommendation order by the order setting unit 15 can be determined based on a comprehensive evaluation of each item, or based on the evaluation of any one or more of the items. Therefore, the search results can be displayed in a recommendation order based only on the number of people's gazes, that is, the number of gazes reaching the inside of the building.
The star symbols constituting the evaluation information 101a, 102a, and 103a shown in the example of FIG. 17 are merely an example, and the evaluation information may also be constituted by bar graphs, numerical values, or patterns or marks that can identify the evaluation content.

In this example, a car object 105 is prepared, and as shown in FIG. 18, this object 105 can be appropriately placed on a specified piece of land to allow the user to imagine a car parked within the lot. In this case, by storing a three-dimensional image of the object 105 in advance, the synthesis processing unit 13 can synthesize the object 105, which is made up of a three-dimensional image, into a three-dimensional image made up of a specified piece of land and a building.

By pressing the download button 106, the three-dimensional image 101 displayed in the enlarged display field 104 can be extracted as data in a predetermined format.
Moreover, when a "Show more search results" button 107 is pressed, buildings searched for by the search processing unit 11 are newly displayed based on a predetermined priority order.

Regardless of this example, the synthesis processing unit 13 can generate a three-dimensional image in which a building is built on a specified piece of land and the surrounding environment of the specified piece of land is integrally reflected, and the three-dimensional image can be viewed from any position, whether inside or outside the building, by a specified operation. Also, a virtual viewpoint set by the viewpoint setting function unit 111 can be identifiably displayed on the three-dimensional image, so that the appearance from the virtual viewpoint can be confirmed in the three-dimensional image. Also, in order to be able to confirm sunlight from a specified position, the origin of sunlight can be set at a specified position, and a distinguishing effect can be given to the sunlight from the origin, such as color-coding areas that are exposed to sunlight and areas that are not exposed to sunlight, so that the sunlight can be confirmed.

The real estate information search device 1 according to the present embodiment described above allows users to grasp, through a concrete three-dimensional image, what kind of building can be built on a given piece of land. In addition, when a building is built on a given piece of land, it is possible to grasp how the line of sight will reach the inside of the building from outside the building, and it is possible to search for a building that is suitable for construction on a given piece of land, taking the line of sight into account.

In a second embodiment of the present invention, a search is made for suitable land on which a given building can be constructed.
This second embodiment is realized by a real estate information search device 1 having the same functional units as those in the first embodiment. That is, in this example as well, the real estate information search device 1 is configured with functional blocks including a land information storage unit 1A, a surrounding environment information storage unit 1B, a building information storage unit 1C, a search processing unit 11, a generation processing unit 12, a synthesis processing unit 13, a specification processing unit 14, an order setting unit 15, and a display processing unit 16. Note that in this example, among the functions executed by each functional unit, the description of the functions described in the first embodiment will be omitted.

Search processing unit 11
The search processing unit 11 executes a process of searching for land that is a candidate for constructing a specified building.
The search processing section 11 is composed of a viewpoint setting function section 111, a first discrimination function section 112, and a second discrimination function section 113, and searches for buildings in response to a search request from a searcher or a search request from a predetermined system.

The viewpoint setting function unit 111 references the surrounding environment information storage unit 1B and sets a virtual viewpoint as a standpoint from which to direct the line of sight toward a specific building when the specific building is constructed on the land. The setting of the virtual viewpoint is the same as that described above.

When a specified building is constructed on a piece of land, the first discrimination function unit 112 compares the direction and angle of the line of sight reaching the inside of the specified building through a window of the specified building from a viewpoint serving as a virtual standpoint outside the building with a specified threshold value to determine whether the land is suitable for constructing the specified building.

The first discrimination function unit 112 also refers to the building information storage unit 1C to discriminate the suitability of the land on which to build a specified building within the range of possible changes to the window layout.
That is, the identification processing unit 14 described later can identify how the angle and direction of the line of sight reaching inside the building from a virtual viewpoint changes when the default window position and size of a specific building are changed within a changeable range. Even if the default window position and size of a specific building are not acceptable in comparison with a predetermined threshold, if the line of sight angle and direction after the change are acceptable in comparison with the predetermined threshold based on information related to the line of sight angle and direction after the change, the first discrimination function unit 112 determines that the land is suitable for building the specific building.

The second discrimination function unit 113 judges whether the land stored in the land information storage unit 1A has basic information that matches the search conditions arbitrarily specified by the searcher or a specified system, and further whether the land has land conditions that meet the building conditions of a specified building specified by the searcher or a specified system.

When searching for land that meets the building conditions of a specified building, the second discrimination function unit 113 determines whether the specified building will fit on the land stored in the land information storage unit 1A, based on the external shape of the land and the building shape of the specified building, with the land direction of the land matching the set direction set for the specified building. Furthermore, when determining whether the specified building will fit on the land, it can determine whether the building will fit when the set direction of the building is tilted within an acceptable angle range.

The second discrimination function unit 113 also determines whether a specific building can fit on a piece of land stored in the land information storage unit 1A when the road direction of the specific land matches the road direction of the building. When determining whether a specific building can fit on the piece of land, it can further determine whether the building can fit on the piece of land when the road direction of the building is tilted within an acceptable angle range.

Synthesis processing unit 13
The synthesis processing unit 13 executes a process of synthesizing a three-dimensional image of a specified building with a three-dimensional image of the surrounding environment of the land, and generating a three-dimensional synthesized image in which the land and the specified building are integrally represented.

Specific processing unit 14
Based on the composite image generated by the synthesis processing unit 13, the identification processing unit 14 identifies the direction and angle of the line of sight that reaches inside a specified building through a window of the specified building from a viewpoint that serves as a virtual standing point outside the building when the specified building is constructed on the land.
In addition, the specific processing unit 14 can also determine how the direction and angle of the line of sight reaching inside a building from a virtual viewpoint changes when the position and size of the default windows of a specified building are changed within a changeable range.
In this example, too, the specific processing unit 14 can set the origin of the sunlight entering the building through the window at a specified position, and identify the direction and angle of the sunlight entering a specified building from that specified position.

Order setting unit 15
The order setting unit 15 can set the order in which lands are recommended based on the search results for lands on which a specified building can be built, based on a qualitative evaluation that takes into consideration each of the specified items in a comprehensive manner.

In this embodiment, a specific terminal configured to be capable of communicating via a network such as the Internet is also provided, and the results of executing the functions of the real estate information search device 1 can be obtained by the specific terminal.

Processing Flow Next, a series of processes executed by the real estate information search device 1 according to this embodiment will be described.
First, FIG. 19 shows the overall flow of a process for searching for land on which a specified building can be constructed.
The real estate information search device 1 receives a request to search for land on which a specific building can be built together with the designation of the specific building (S401).
In response to this, the search processing unit 11, through the second discrimination function unit 113, refers to the land information memory unit 1A and the building information memory unit 1C, and searches for land on which the specified building can be built based on the basic information and conditions of the specified building and land (S402).
Furthermore, for the land narrowed down by the second discrimination function unit 113, the search processing unit 11 uses the first discrimination function unit 112 to refer to the land information memory unit 1A and the building information memory unit 1C to search for land that can be determined to be suitable for constructing a specified building based on the line of sight reaching the inside of the building from outside the building (S403).
As a result of the above search processing by the search processing unit 11, land that is determined to be suitable for the construction of a specified building is presented as a search result (S404).

In the above search process, the second discrimination function unit 113 narrows down the land to be searched, and then the first discrimination function unit 112 further narrows down the land. However, the order of the processing by the first discrimination function unit 112 and the second discrimination function unit 113 does not matter, and after the first discrimination function unit 112 narrows down the land to be searched, the second discrimination function unit 113 may further narrow down the land.
In addition, the specification of a specific building does not necessarily have to be made by the user, but the real estate information search device may specify a specific building on a specific website, etc., in order to propose land to the user as an advertisement, and request a search for land on which the specific building can be built.

Next, the details of the above-mentioned process of S402 will be described with reference to FIG.
First, the second discrimination function unit 113 of the search processing unit 11 determines whether the land stored in the land information storage unit 1A has basic conditions that match the basic information of a specified building (S501). Furthermore, it narrows down the land that has land conditions that match the building conditions of the specified building (S502). Here, information such as the building coverage ratio and floor area ratio determined for each land is compared with information such as the site area and building area of each building, and the land on which the specified building can be built without exceeding the restrictions such as the building coverage ratio and floor area ratio is narrowed down.

Then, the second discrimination function unit 113 further determines whether the building shape of the specified building fits into the land shape of the land narrowed down as described above, when the land direction of the land is aligned with the set direction of the specified building (S503).
In addition, if the shape of the specified building does not fit within the shape of the land when the land direction of the land and the set direction of the specified building are matched, the building is tilted within an allowable angle range for the set direction set for the specified building to determine whether the shape of the specified building fits within the shape of the land (S504).

As a result, if the shape of a specified building does not fit within the land shape even within the range of allowable angles set for the specified building, the land is treated as not satisfying the search conditions.
On the other hand, in the processing of S503, if the shape of the specified building fits within the shape of the land when the land direction of the land and the set direction of the specified building are matched, and in the processing of S254, if the shape of the specified building fits within the shape of the land when the set direction of the specified building is tilted within the range of the allowable angle, the land is judged to satisfy the search conditions in the processing by the second discrimination function unit 113.

The second discrimination function unit 113 then goes on to determine whether the shape of the specified building can fit within the shape of the land narrowed down as described above, when the direction of the land's road access matches the direction of the road of the specified building (S505).
Furthermore, if the shape of the specified building does not fit within the shape of the land when the road access direction of the land and the road direction of the specified building are aligned, it is determined whether the shape of the specified building fits within the shape of the land when the road direction of the specified building is tilted within the allowable angle range (S506).

As a result, if the shape of a specified building does not fit within the land shape even within the range of allowable angles set for the specified building, the land is treated as not satisfying the search conditions.
On the other hand, in the processing of S505, if the shape of the specified building fits within the shape of the land when the road access direction of the land and the road direction of the specified building are aligned, and in the processing of S506, if the shape of the specified building fits within the shape of the land when the road direction of the specified building is tilted within the range of the allowable angle, the land is judged to satisfy the search conditions in the processing by the second discrimination function unit 113.

The order of the processing based on the basic conditions in S501, the processing based on the land conditions and building conditions in S502, the processing based on the set direction of the building and the land direction of the land in S503 and S504, and the processing based on the road direction of the building and the road facing direction of the land in S505 and S506 is not limited to the order described in this example, and may be executed in an order different from that of this example. Also, it is possible to execute only one or a part of these processes.

Next, the details of the above-mentioned process of S503 will be described with reference to FIG.
The generation processing unit 12 references the surrounding environment information storage unit 1B and generates a three-dimensional image of the surrounding environment of the land to be searched from photographed images of the surrounding environment of the land (S601).
In response to this, the synthesis processing unit 13 synthesizes the three-dimensional image of the predetermined building with the three-dimensional image of the surrounding environment of the land to generate a three-dimensional synthesized image in which the land and the predetermined building are displayed integrally (S602). As a result, a three-dimensional image is generated in which the predetermined building is three-dimensionally superimposed on the land.

The viewpoint setting function unit 111 identifies a predetermined object included in the three-dimensional image of the surrounding environment of the land (S603). That is, the predetermined object is identified as an object or place where a person may be present, such as a window or an outside staircase of a building built around the land, and therefore where the viewpoint can be reasonably considered to be present.
The viewpoint setting function unit 111 sets a virtual viewpoint at a predetermined location including the predetermined object (S604). These virtual viewpoints are objects or locations that can be reasonably considered to be human viewpoints, and by setting such virtual viewpoints, it is possible to grasp the direction and angle of the line of sight that is expected to reach inside a building when the building is constructed on the land.

Based on the window layout stored in the building information memory unit 1C, the first discrimination function unit 112 determines whether the direction and angle of the line of sight reaching the inside of the building through the windows of the building from a viewpoint serving as a virtual standing point outside the building, when a specified building is constructed on a piece of land, is within an acceptable range by comparing it with a specified threshold value (S605).
As a result, if the direction and angle of the line of sight from the virtual viewpoint are within a permissible range, the image is treated as satisfying the search conditions.

On the other hand, in S605, if the direction and angle of the line of sight from the virtual viewpoint are not within the acceptable range, the first discrimination function unit 112 refers to the window change tolerance information stored in the building information storage unit 1C, and changes the window layout within the acceptable range to determine whether the direction and angle of the line of sight from the virtual viewpoint to the inside of the building are within the acceptable range by comparing them with predetermined thresholds (S606).
As a result, if changing the window layout within the allowable range brings the line of sight direction and angle from the virtual viewpoint within the allowable range, the search condition is treated as being met. On the other hand, if changing the window layout within the allowable range does not bring the line of sight direction and angle from the virtual viewpoint within the allowable range, the search condition is treated as not being met.

The real estate information search device 1 according to the present embodiment described above allows a user to grasp, through a concrete three-dimensional image, the type of land on which a specific building will be built. In addition, it allows the user to grasp how the line of sight will reach the inside of a specific building from outside the building when the building is built on that land, and it allows the user to search for land suitable for building the specific building, taking the line of sight into account.

In this embodiment, like the first embodiment, it is possible to display search processing results and three-dimensional images.

In addition, in the process of searching for buildings or land according to the above-described embodiment of the present invention, if the land is large and there is a degree of freedom in the layout of the buildings, the first discrimination function unit 112 may simulate various layouts of the buildings as long as changes in the land conditions, building conditions, and even window layout are allowed, and determine whether the line of sight falls within an acceptable range.

In addition, in the above-described embodiment of the present invention, a three-dimensional image may be incorporated with objects that can obscure the view from outside the building, such as louvers, fences, walls, plantings, exteriors, and garages, to simulate how views from outside the building can be avoided.
In addition, the first discrimination function unit 112 may be configured to determine whether the direction and angle of the line of sight reaching inside the building is within an acceptable range when such a line of sight obstruction is installed.

In addition, in the search results, etc., information may be provided so that information on buildings, commercial facilities, etc. in the vicinity of a specified piece of land can be understood.

The evaluations (sunlight, visibility, openness, etc.) displayed as search results of the real estate information search device 1 according to the embodiment of the present invention may be reflected in the price appraisal of real estate. In other words, the above-mentioned evaluations are added as calculation standards to the price of real estate calculated from the market price of real estate, revenue forecasts, and actual demand based on information on actual buyers and sellers. This allows indices that are directly related to livability, such as sunlight, visibility, and openness, to be reflected in the price, making it possible to present a more appropriate appraisal.

REFERENCE SIGNS LIST 1 Real estate information search device 1A Land information storage unit 1B Surrounding environment information storage unit 1C Building information storage unit 11 Search processing unit 111 Viewpoint setting function unit 112 First discrimination function unit 113 Second discrimination function unit 12 Generation processing unit 13 Synthesis processing unit 14 Identification processing unit 15 Order setting unit 16 Display processing unit

Claims (10)

Surrounding environment information relating to the surrounding environment of a specified piece of land;
Information on a specific building is input, the information including at least window information related to the layout of windows in the specific building;
The output is the suitability of building the specified building on the specified land based on the line of sight and the angle reaching the building through the window of the specified building;
The surrounding environment information includes information on a predetermined object that can be reasonably considered to have a viewpoint.
Real estate information processing device. The suitability of the construction of the specified building is determined by comparing the angle of the line of sight reaching inside the building with a specified threshold value.
The real estate information processing device according to claim 1. The building information includes change allowance information related to a range in which a layout of windows in the specified building can be changed,
The suitability of the construction of the specified building is based on the line of sight and angle reaching into the building through the windows of the specified building within the range of the layout that can be changed for the windows.
3. The real estate information processing device according to claim 1 or 2. The information on the surrounding environment of the specified land is a photographed image of the surrounding environment of the specified land.
The real estate information processing device according to claim 1 . and outputting a composite image obtained by combining the three-dimensional image of the surrounding environment of the specified land and the specified building.
The real estate information processing device according to claim 1 . Surrounding environment information relating to the surrounding environment of a specified piece of land;
inputting information on a predetermined building, the information including at least window information relating to a layout of windows in the predetermined building;
and outputting whether or not it is appropriate to build the specified building on the specified land based on the line of sight and the angle reaching inside the building through the windows of the specified building,
The surrounding environment information includes information on a predetermined object that can be reasonably and intelligently considered to have a viewpoint.
Methods for processing real estate information. Surrounding environment information relating to the surrounding environment of a specified piece of land;
inputting information on a predetermined building, the information including at least window information relating to a layout of windows in the predetermined building;
and outputting whether or not it is appropriate to build the specified building on the specified land based on the line of sight and the angle reaching the inside of the building through the windows of the specified building;
The surrounding environment information includes information on a predetermined object that can be reasonably and intelligently considered to have a viewpoint.
Computer program. Surrounding environment information relating to the surrounding environment of a specified piece of land;
Building information including at least window information relating to the layout of windows in the building is input;
outputting a search result for a building that is determined to be suitable for construction on the specified land based on the line of sight and angle reaching inside the building through the windows of the specified building;
The surrounding environment information includes information on a predetermined object that can be reasonably and intelligently considered to have a viewpoint.
Real estate information search device. Surrounding environment information relating to the surrounding environment of a specified piece of land;
inputting building information including at least window information relating to a layout of windows in the building;
and outputting a search result of buildings that are determined to be suitable for construction on the specified land based on the line of sight and the angle of the line of sight reaching inside the building through the windows of the specified building,
The surrounding environment information includes information on a predetermined object that can be reasonably and intelligently considered to have a viewpoint.
How to search real estate information. Surrounding environment information relating to the surrounding environment of a specified piece of land;
inputting building information including at least window information relating to a layout of windows in the building;
and outputting a search result of buildings that are determined to be suitable for construction on the specified land based on the line of sight and the angle of the line of sight reaching the inside of the building through the windows of the specified building;
The surrounding environment information includes information on a predetermined object that can be reasonably and intelligently considered to have a viewpoint.
Computer program.

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