JP4532320B2 - Image display device - Google Patents

Description

  The present invention relates to an image display device for displaying an image obtained by imaging with an imaging device, for example.

  2. Description of the Related Art Conventionally, an image display device that captures and displays an image captured by an imaging device using an imaging device such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS) has been widely used. Many such image display devices have a function of displaying a captured image on a display device such as a monitor and displaying the captured image by enlarging or reducing it to an arbitrary size by operating a mouse or a keyboard. It has been. For example, affine transformation is used for enlargement / reduction of an image.

Further, in order to search for a desired image, many have a function of creating a reduced image (hereinafter referred to as a thumbnail) from a captured image and displaying a list of the thumbnails. Furthermore, a video data search and display method has been proposed in which the color or pattern of the thumbnail frame to be displayed is changed in accordance with the attribute information of the captured image to be displayed (see, for example, Patent Document 1).
JP 2002-94898 A

  However, in general, thumbnails such as those in the conventional art are created by reducing the entire captured image. For this reason, for example, thumbnails created from captured images that continue to capture the same range, such as a surveillance camera, are substantially similar, and the operator can determine whether there has been a change just by looking at the thumbnail. It is difficult. For this reason, the operator has to repeatedly perform the operation of selecting thumbnails, displaying each image as a whole and confirming the contents of the images, and there is a problem that the operation becomes very complicated.

  Accordingly, the present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide an image display device that makes it possible to easily grasp the contents of an image from a thumbnail when searching for a desired image. Is to provide.

In order to achieve the above object, an image display apparatus according to the present invention comprises storage means for storing an image, and presentation means for presenting a plurality of thumbnail display modes having different image extraction rules to the operator. Accept selection input of thumbnail display mode. Then, partial images are extracted from the stored images in accordance with the image extraction rules specified by the selected and input thumbnail display mode, and the extracted partial images are adjusted to a certain size and displayed in a list. is there.
As a result, thumbnails extracted from the feature portion of the image specified by the operator are displayed, so that the contents can be easily grasped. Therefore, even when a large number of thumbnails are displayed in a list, the operator can select the desired image. Can be easily searched.

The present invention is also characterized by having the following various configurations.
In the first configuration, the presenting means presents an extraction object designation thumbnail display mode for designating a specific extraction object as one of the thumbnail display modes, and this extraction object designation thumbnail display mode is selected and input. In this case, a partial image corresponding to a specific extraction object designated by the extraction object designation thumbnail display mode is extracted from the stored image.
By configuring in this way, for example, thumbnails of specific objects such as people and license plates are displayed in a list, so that the time and effort required for the operator to search for images of the objects can be reduced. be able to.

In the second configuration, the presenting means presents an extraction target range designation thumbnail display mode for designating an extraction target range in an image as one of the thumbnail display modes, and further specifies the extraction target range. Accepting input of range specification information. When the extraction target range designation thumbnail display mode is selected and input, a partial image in the corresponding extraction target range is extracted from the stored image according to the input range designation information.
Thereby, for example, when it is desired to focus only on a part of the image captured by the surveillance camera, it is possible to easily grasp the temporal change of the desired target range.

  Therefore, according to the present invention, when searching for a desired image, it is possible to provide an image display device that makes it possible to easily grasp the content of an image from a thumbnail.

FIG. 1 is a schematic configuration diagram of a monitoring system using an image display apparatus according to an embodiment of the present invention.
In this monitoring system, the image display device 1 and the imaging device 2 can be connected via a transmission path 3. The image display device 1 is constituted by, for example, a personal computer provided with browser software. The imaging device 2 is configured by, for example, a network camera or a Web camera, and has a function of digitally processing an image captured by a solid-state imaging device such as an imaging tube or a CCD and distributing the image via a network interface. The transmission path 3 is a LAN cable or the like, and may be connected to a network such as an analog telephone network, an ISDN network, a digital leased line network, or the Internet.

FIG. 2 is a block diagram illustrating a functional configuration of the image display apparatus 1.
The image display device 1 includes a central processing unit (CPU) 11 as a main control unit. A data memory 13 and a program memory 14 are connected to the CPU 11 via a bus 12, and an image pickup device interface (image pickup device I / F) 15, an input interface (input I / F) 16, and an output interface. (Output I / F) 17 is connected.

  The imaging device I / F 15 receives a captured image from the imaging device 2 via the transmission path 3 under the control of the CPU 11. An input device 161 such as a keyboard or a mouse is connected to the input I / F 16, and operation information input from the user by the input device 161 is received. A display device 171 such as a liquid crystal display (LCD) or a television monitor is connected to the output I / F 17, and a captured image obtained from the imaging device 2 is output to the display device 171 under the control of the CPU 11.

  The data memory 13 includes a storage device such as a RAM or a hard disk, and includes a captured image storage area 13a and a specific position storage area 13b. In the captured image storage area 13a, captured images of the imaging device 2 captured by the input I / F 16 are stored together with image information. The image information includes imaging date / time, imaging camera name, and shutter mode. The imaging camera name is a name given in relation to the place where the imaging device 2 is installed or the monitoring target of the imaging device 2, for example. The shutter mode is information relating to an imaging method such as imaging by a manual shutter by an operator or imaging by an automatic shutter based on an alarm input from an external sensor or the like. The specific position storage area 13b stores specific position information which is range designation information for creating a thumbnail. Details of the specific position will be described later.

  On the other hand, the program memory 14 stores a search display program 14a, an entire image thumbnail creation program 14b, an object thumbnail creation program 14c, and a specific position thumbnail creation program 14d as control programs for realizing the present invention.

  The search display program 14a searches for a corresponding image from the photographed image storage area 13a in accordance with a search condition designated by the user, and creates and displays a thumbnail of the searched image. The whole image thumbnail creation program 14b creates a thumbnail obtained by reducing the entire captured image. The object thumbnail creation program 14c extracts the object selected by the user and creates a thumbnail from the extracted partial images. The specific position thumbnail creation program 14d extracts a captured image at a specific position designated in advance by the user and creates a thumbnail.

  3 and 4 show an example of a screen configuration displayed by the image display device 1. FIG. 3 shows an example of the configuration of the operation screen 301. The operation screen 301 includes an entire image display unit 302 and an image enlargement display unit 304, and further includes an enlargement display frame 303, a shutter button 305, enlarged image position movement buttons 306a, 306b, 306c, and 306d, and an enlargement ratio. A change button 307 and a file selection button 308 are provided.

  The entire image display unit 302 displays the entire captured image selected by the operator. The enlarged display frame 303 is displayed on the entire image display unit 302, and a partial image within the range included in the enlarged display frame 303 is enlarged and displayed on the image enlarged display unit 304. The enlarged image position moving buttons 306a, 306b, 306c, and 306d move the display position of the enlarged display frame 303 by a predetermined amount (for example, 1 dot) in the upward direction, the downward direction, the left direction, and the right direction, respectively. While the enlarged image position moving buttons 306a, 306b, 306c, and 306d are kept pressed, the enlarged display frame 303 continuously moves. Further, the enlarged display position movement buttons 306a, 306b, 306c, and 306d may be interlocked with up / down / left / right keys of the keyboard. When the operator moves the enlarged display frame 303, the partial image of the image enlarged display unit 304 is updated.

  The position of the partial image displayed on the image enlargement display unit 304 can be finely adjusted by the enlargement display position movement buttons 306a, 306b, 306c, and 306d. By finely adjusting the position of the partial image on the image enlargement display unit 304 by pressing the image enlargement display unit 304 to be in a selected state. When the enlarged display position movement buttons 306a, 306b, 306c, and 306d are pressed in the above selection state, the image is moved by one dot in the upward direction, the downward direction, the left direction, and the right direction. Can be moved.

  The enlargement ratio change button 307 displays the partial image displayed on the image enlargement display unit 304 according to the selected enlargement ratio. When the inverted triangle button on the right side of the enlargement ratio change button 307 is pressed, a list of enlargement ratios is displayed as shown in FIG. 9, and the enlargement ratio is selected from the list and changed. When the enlargement factor is changed by the enlargement factor change button 307, the size of the enlargement display frame 303 and the range of the partial image displayed on the image enlargement display unit 304 are changed to the selected enlargement factor without changing the center. Is displayed.

  The shutter button 305 transmits a request signal for acquiring an image to the imaging device 2. When the shutter button 305 is pressed at an arbitrary time by the operator, the CPU 11 of the image display device 1 acquires a captured image by the imaging device 2 from the captured image I / F 15, and the acquired captured image is stored in the captured image storage area 13a. Remember. The file selection button 308 has a function of selecting a captured image to be displayed on the entire image display unit 302. When the file selection button 308 is pressed by the operator, the CPU 11 of the image display device 1 causes a file selection dialog 401 to be described later. Is displayed.

FIG. 4 shows an example of the screen configuration of the file selection dialog 401. The file selection dialog 401 includes a search area 402, a thumbnail display field 403, and a display button 404.
The search area 402 sets search conditions for searching for a desired image from the captured image storage area 13a. The search function includes a date / time search function 405 for performing a search by specifying a date / time range, a camera search function 406 for searching for an image captured with the name of the installed camera, a display mode selection function 407 for setting a thumbnail display mode, and an image There are four shutter mode functions 408 for retrieving the imaging method. When the search condition is set using these functions alone or in combination and then the search start button 409 is pressed, the image information of each image stored in the captured image storage area 13a is compared with the search condition. A thumbnail of the image is displayed in the thumbnail display field 403.

  In the thumbnail display field 403, thumbnails of captured images searched based on the search conditions set in the search area 402 are displayed in a list. In the initial thumbnail display field 403, the entire image captured on the same day as the latest captured image is displayed as a thumbnail. When a thumbnail is selected from the thumbnail display field 403 and the display button 404 is pressed, the entire captured image corresponding to the selected thumbnail is displayed on the entire image display unit 302. Note that when the thumbnail displayed in the thumbnail display field 403 is double-clicked, the entire captured image corresponding to the double-clicked thumbnail is displayed on the entire image display unit 302 in the same manner. At this time, the partial image displayed on the enlarged image display unit 304 is updated in conjunction with the update of the entire image display unit 302.

  By the way, when a high-definition image having a larger number of pixels than the number of pixels of the display is used, an entire image reduced by thinning out pixels is displayed on the entire image display unit 302, for example. However, since the high-definition image is superior in definition, image quality, number of pixels, number of gradations per pixel, compression rate, etc., compared with a low-quality standard image, the enlarged display is performed on the image enlargement display unit 304. Even in this case, it is possible to display a finer image than the standard image.

Next, the operation of the image display device 1 configured as described above will be described. FIG. 11 is a flowchart showing the entire procedure and contents of search display processing in the image display apparatus 1. Prior to this, it is assumed that the operator inputs search conditions in the search area 402 of the file selection dialog 401 and presses the search start button 409.
In step S11a, the CPU 11 of the image display apparatus 1 acquires the search condition input in the search area 402 of the file selection dialog 401. The search conditions include date and time, camera type, thumbnail display mode, and shutter mode. In step S11b, the CPU 11 searches for a captured image according to the search conditions (date and time, camera type, and shutter mode) acquired from the captured image storage area 13a. Then, a thumbnail creation process is performed for each retrieved captured image as follows.

That is, in step S11d, the thumbnail display mode is determined. If it is determined in this determination that the thumbnail display mode is “whole”, the process proceeds to step S11e to create a thumbnail for displaying the entire captured image in a reduced size. FIG. 12 is a flowchart showing the procedure and contents of the whole image thumbnail creation process.
The CPU 11 of the image display device 1 executes the whole image thumbnail creation program 14b, and reads a search image from the captured image storage area 13a in step S12a. In step S12b, the size of the retrieved image is adjusted according to the thumbnail display size in the thumbnail display field 403 to create a thumbnail.
Then, the process proceeds to step S11i to display the created thumbnail.

If it is determined in step S11d that the thumbnail display mode is “target object”, the process proceeds to step S11f to create a thumbnail from the partial image obtained by extracting the target object from the captured image. FIG. 13 is a flowchart showing the procedure and contents of the object thumbnail creation process.
The CPU 11 of the image display device 1 executes the object thumbnail creation program 14c, and reads a search image from the captured image storage area 13a in step S13a. In step S13b, the CPU 11 extracts an object from the read search image. Here, the object refers to “person (face)”, “person (whole)”, “person (bust shot)”, “number” provided in the thumbnail display mode 407 of the file selection dialog 401 shown in FIG. Each item of “Plate” is shown. For example, when “person (face)” is selected, an image of the face range is extracted using a face detection engine or the like. When “number plate” is selected, an image of a vehicle license plate is extracted using an image recognition technique, a character recognition algorithm, or the like.

  In step S13c, it is determined whether or not the image of the object in step S13b has been extracted. If it is determined in this determination that the object has been extracted, the process proceeds to step S13d, where the size of the extracted image is adjusted to the display area of the thumbnail display field 403, and a thumbnail is created. If it is determined in step S13c that the image of the object has not been extracted, the process ends without creating a thumbnail.

  Then, the process proceeds to step S11h, and it is determined whether a thumbnail has been created. If it is determined in step S11h that a thumbnail has been created, the process proceeds to step S11i to display the created thumbnail. If it is determined in step S11h that a thumbnail has not been created, the next search image is processed without performing the display process.

Further, if it is determined in step S11d that the thumbnail display mode is “specific position”, the process proceeds to step S11g, and a captured image is extracted according to the specific position preset by the operator, and the extracted image is extracted. Create a thumbnail from FIG. 14 is a flowchart showing the procedure and contents of the specific position thumbnail creation process.
The CPU 11 of the image display device 1 executes the specific position thumbnail creation program 14d, and in step S12a, reads the search image from the captured image storage area 13a and accesses the specific position storage area 13b to read the specific position information. The specific position information is a target area for creating a thumbnail set in advance by the operator. For example, the specific position is set in the following procedure.

  If the operator presses the setting button 410 while the file selection dialog 401 of FIG. 5 is displayed on the display device 171 of the image display device 1, the CPU 11 of the image display device 1 causes the identification as shown in FIG. A position setting dialog 601 is displayed. The specific position setting dialog 601 includes a specific position setting image 602, a range selection frame 603, an OK button 604, and a Cancel button 605. The specific position setting image 602 displays the entire captured image, and a range selection frame 603 displayed on the specific position setting image 602 represents a specific position for creating a thumbnail.

  The operator moves and enlarges / reduces the range selection frame 603 with the input device 161 such as a mouse, and sets a specific position for creating a thumbnail. When the OK button 604 is pressed by the operator in this state, the CPU 11 closes the specific position setting dialog 601 and stores the specific position information indicating the set range selection frame 603 in the specific position storage area 14b. At this time, if the range selected by the operator is different from the aspect ratio of the thumbnail image, the range corresponding to the aspect ratio of the thumbnail image using the long side is set as the specific position. On the other hand, when the Cancel button 605 is pressed by the operator, the specific position setting dialog 601 is closed and the set specific position becomes invalid.

Based on the specific position information set in this way, in step S14b, the CPU 11 extracts an image included in the set specific position from the read search image. Then, the process proceeds to step S14c, and the size of the extracted specific position image is adjusted in accordance with the display area of the thumbnail display field 403 to create a thumbnail.
Then, the process proceeds to step S11i, and the CPU 11 of the image display device 1 displays the created thumbnail.

  As described above, the CPU 11 of the image display device 1 creates thumbnails according to the selected thumbnail display mode for all of the searched captured images, and displays the created thumbnails in the thumbnail display field 403 as a list. . For example, FIG. 4 shows a display example of the thumbnail display field 403 when an object, that is, “person (bust shot)” and “number plate” is selected as the thumbnail display mode. FIG. 5 shows a display example of the thumbnail display field 501 when a specific position is selected in the thumbnail display mode.

  As described above, the CPU 11 of the image display device 1 executes the search display program 14a and searches the captured image storage area 13a for a captured image based on the search condition input by the operator. Then, the CPU 11 executes the whole image thumbnail creation program 14b, the object thumbnail creation program 14c, or the specific position thumbnail creation program 14d according to the thumbnail display mode specified by the operator, and performs a partial search from the retrieved captured image. Extract images. The CPU 11 creates thumbnails based on the extracted partial images, and displays the created thumbnails as a list on the display device 171.

  Therefore, according to this embodiment, when the operator searches for a desired image, the contents of the image can be easily grasped by the thumbnails displayed as a list. For example, FIGS. 15 and 16 show operation screens displayed by a conventional image display device. In the thumbnail display field 1502 of the file selection dialog 1501 shown in FIG. 15, thumbnails 1502a and 1502b created by reducing the entire image are displayed. For example, if the operator selects the thumbnail 1502a and then presses the display button 1503, an operation screen 1601 as shown in FIG. 16 is displayed. The entire image corresponding to the thumbnail 1502a is displayed in the entire image display portion 1602 of the operation screen 1601.

  Here, the partial image included in the enlarged display frame 1603 is displayed in the enlarged image display unit 1604, but it is impossible to grasp the presence of the person displayed in the enlarged image display unit 1604 from the thumbnail 1502a. is there. Thus, when a thumbnail is created from the entire image, it is difficult to recognize a small feature from the thumbnail.

  On the other hand, in the present invention, as shown in FIG. 4, a desired object selected by the operator is extracted, and a thumbnail including the extracted object is displayed. Thereby, even if the desired object is small, the object can be reliably displayed on the thumbnail. As a result, the operator can easily search for a desired object simply by looking at the thumbnail, and further, the entire image can be displayed from the corresponding thumbnail to confirm the details of the object and the surrounding state. it can.

  The thumbnail display field 403 displays thumbnails created from partial images extracted from specific positions of the images. As shown in FIG. 5, the thumbnail display field 403 displays thumbnails created from images included in the specific position designated by the range selection frame 603 of the specific position setting dialog 601. For example, with these thumbnails, it is possible to instantly know when a person appears or when a car disappears. In this way, it is possible to easily grasp the contents and changes of a plurality of similar images.

  The present invention is not limited to the above embodiment. For example, in the operation screen 301 shown in FIG. 3, the enlarged display position movement buttons 306a, 306b, 306c, 306d may be configured as follows. In addition to the four directions of up, down, left, and right in the above embodiment, as shown in FIG. 8, four buttons in an oblique direction may be added to provide an enlarged display position movement button 306A in eight directions. In this way, it is possible to smoothly move the enlarged display frame 303 in an oblique direction.

  Further, without providing the enlarged display position moving buttons 306a, 306b, 306c, and 306d, the pressed position in the entire image display unit 302 or the enlarged image display unit 304 with a mouse or the like is displayed on the entire image display unit 302 with a mark or the like. In addition, the partial image displayed on the image enlargement display unit 304 may be updated so that the pressed position is the center. Further, the partial images displayed on the image enlargement display unit 304 may be continuously moved in accordance with a mouse drag operation (an operation of moving the mouse while the left button of the mouse is pressed).

  Further, the enlargement ratio change button 307 may be configured by, for example, an enlargement ratio change pop-up menu 307A as shown in FIG. This enlargement ratio change pop-up menu is displayed by right-clicking the mouse inside the entire image display section 302 or the image enlargement display section 304. In the enlargement ratio change pop-up menu, all the enlargement ratios prepared in advance are displayed, and the display ranges of the enlargement display frame 303 and the image enlargement display section 304 are updated according to the enlargement ratio selected by the operator, and the updated display is displayed. The partial image included in the range is enlarged and displayed on the image enlargement display unit 304.

  In addition, the enlargement ratio of the partial image displayed on the image enlargement display unit 304 can be changed using a mouse wheel. For example, when the operator rotates the mouse wheel to the back in the entire image display unit 302 or the image enlargement display unit 304, the enlargement ratio is increased by one step from the current setting, and when the operator rotates the front, Make the rate one step lower than the current setting. Further, the enlargement ratio may be changed according to the amount of wheel rotation of the mouse. Specifically, the minimum rotation angle (for example, 15 °) of the wheel is set as one step, and the enlargement ratio is changed by 5% per step. For example, when the wheel is rotated 6 steps (90 °) in the back, the enlargement ratio is increased by 30%. In addition, when the wheel is rotated 10 steps (150 °) forward, the enlargement ratio is reduced by 50%.

  Further, the search condition provided in the search area 402 is not limited to the above embodiment. For example, a keyword search function may be added in which a characteristic keyword is added to the image information stored together with the captured image in the captured image storage area 13a, and the keyword is specified and searched. Further, a function for setting an important image as a bookmark may be provided, and a bookmark search for displaying only an image set as a bookmark may be used as a search function.

  In the above-described embodiment, the object thumbnail creation process is configured to determine whether or not the corresponding object is included in the searched image. However, information on the object included in the captured image in advance is used. Can be added to the image information, and a thumbnail can be created based on this image information. For example, in order to create a thumbnail of “person (face)” by adding to the image information that the face range information detected using the face detection engine and the person are displayed after the image is captured. Creates a partial enlarged image of the face using this range information.

  In addition, based on inputs from external sensors such as a magnetic sensor, an infrared sensor, a pressure sensor, a thermal sensor, and a vibration sensor installed in the imaging area of the imaging device 2, the detection range of the external sensor on the image is important. It is good to add it to the image information as the range information. Further, when the operator browses the captured image, a search key and an important range may be manually added to the image information.

  Furthermore, in the above-described embodiment, the thumbnail displayed in the thumbnail display field 403 is created each time by the search operation in the file search dialog 401. For example, a thumbnail is created in advance and stored in the data memory 13. Alternatively, the stored thumbnails may be read based on the search conditions.

  Further, the specific position setting dialog 601 can have a screen configuration as shown in FIG. The specific position setting image 702 displayed in the specific position setting dialog 701 is divided into m × m {m = 2,..., N−1} (3 × 3 in FIG. 7). A specific position is selected by. For example, FIG. 7 shows a state where the divided image 703 is pressed by the operator and is in a selected state. In this state, when the OK button 704 is pressed, the specific position setting dialog 701 is closed, and the range designation information of the selected divided image 703 is stored as the specific position information in the specific position storage area 14b. On the other hand, when the Cancel button 705 is pressed, the specific position setting dialog 701 is closed and the setting of the specific position becomes invalid. In addition, the division number of the specific position setting image 702 is changed by a division number change button 706.

  In addition, the present invention also includes the configuration of the image display device 1, the configuration of each screen displayed on the display device 171, the items stored in the data memory 13, the processing procedure of each program stored in the program memory 14, and the processing content thereof. Various modifications can be made without departing from the scope of the present invention.

  In short, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

1 is a schematic diagram of a monitoring system using an image display device according to an embodiment of the present invention. The block diagram which shows the function structure of the image display apparatus shown in FIG. The figure which shows an example of the operation screen displayed on an image display apparatus. The figure which shows an example of the file selection screen displayed on an image display apparatus. The figure which shows the other example of a display of the file selection screen displayed on an image display apparatus. The figure which shows an example of the specific position setting screen displayed on an image display apparatus. The figure which shows the other structural example of the specific position setting screen displayed on an image display apparatus. The figure which shows the other structural example of the operation button used for the operation screen shown in FIG. The figure which shows the other structural example of the operation button used for the operation screen shown in FIG. The figure which shows the other structural example of the operation button used for the operation screen shown in FIG. The flowchart which shows the procedure and the content of the search display process in the image display apparatus of FIG. The flowchart which shows the procedure of the whole image thumbnail preparation process in the image display apparatus of FIG. 1, and its content. The flowchart which shows the procedure and the content of the object thumbnail preparation process in the image display apparatus of FIG. The flowchart which shows the procedure of the specific position thumbnail preparation process in the image display apparatus of FIG. 1, and its content. The figure which shows an example of the operation screen of the conventional image display apparatus. The figure which shows an example of the operation screen of the conventional image display apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Image display apparatus, 2 ... Imaging device, 3 ... Transmission path, 11 ... CPU, 12 ... Bus, 13 ... Data memory, 13a ... Captured image storage area, 13b ... Specific position storage area, 14 ... Program memory, 14a ... Search display program, 14b ... Whole image thumbnail creation program, 14c ... Object thumbnail program, 14d ... Specific position thumbnail creation program, 15 ... Imaging device I / F, 16 ... Input I / F, 161 ... Input device, 17 ... Output I / F, 171 ... display device, 301 ... operation screen, 302 ... entire image display section, 304 ... image enlargement display section, 305 ... shutter button, 306a, 306b, 306c, 306d, 306A ... enlargement display position move button, 307 ... enlargement ratio change button, 307A ... enlargement ratio change pop-up menu, 308 ... file selection button 401 ... File selection dialog, 402 ... Search area, 403,501 ... Thumbnail display field, 404 ... Display button, 405 ... Date search function, 406 ... Camera search function, 407 ... Display mode selection function, 408 ... Shutter mode function 409 ... Search start button 410 ... Setting button 601, 701 ... Specific position setting dialog, 602, 702 ... Specific position setting image, 603 ... Range selection frame, 604, 704 ... OK button, 605, 705 ... Cancel button, 703: Selected divided image.

Claims (3)

Storage means for storing image information including at least one of imaging date and time, imaging camera name, and shutter mode for a plurality of images together with the plurality of images;
Retrieval means for retrieving an image having the image information that matches the search condition from the storage means when a search condition specifying at least one of the image information is set by an operator and a search start operation is performed When,
Presenting means for presenting a plurality of thumbnail display modes with different image extraction rules to the operator;
Mode receiving means for receiving selection input of the plurality of thumbnail display modes by the operator;
Extraction means for extracting a partial image from the searched image according to an image extraction rule specified by the selected and input thumbnail display mode;
The extracted partial image is adjusted to a size that matches the display area of the thumbnail display field to create thumbnails, and includes display means for displaying a list in the thumbnail display field,
The presenting means presents an extraction object designation thumbnail display mode for designating at least one specific extraction object as one of the thumbnail display modes,
Said extracting means, when the extract object designation thumbnail display mode is selected input, from the retrieved the image, corresponding to a specific extract the object specified by the extracted object designation thumbnail display mode An image display device that extracts a partial image. The shutter mode is information that can determine whether the storage by the manual shutter of the operator is stored in the storage means or the storage by the automatic shutter based on an alarm input from an external sensor.
Each image stored in the storage means is a high-definition image having a larger number of pixels than the number of pixels on the screen of the display means,
When the display means displays one of the images stored in the storage means on the entire image display section of the screen, the display means reduces the display by thinning out the pixels,
Extract the object designated by the extracted object designation thumbnail display mode is intended a human face, the whole of a person, the bus preparative shot of a person, or that of the license plate, any two or more are specified by the operator The image display apparatus according to claim 1, wherein the image display apparatus is provided. The presenting means presents an extraction target range designation thumbnail display mode for designating an extraction target range in an image as one of the thumbnail display modes,
The mode accepting unit further accepts input of range designation information for designating the extraction target range,
When the extraction target range designation thumbnail display mode is selected and input, the extraction unit extracts a partial image of the corresponding extraction target range from the searched image according to the input range designation information. The image display device according to claim 1, wherein:

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