JP5434499B2 - Handle pattern visualization apparatus, pattern pattern visualization method, and program - Google Patents

Description

  The present invention relates to a handle visualizing device that supports confirmation of a design of a medium by using surface depth data (height field) of a medium having an uneven pattern on the surface.

Conventionally, in order to produce a medium such as wallpaper or synthetic leather having a concavo-convex pattern on the surface, a surface depth data (hereinafter referred to as height field) of a desired pattern is first generated using a computer or the like, and then this height Based on the field, a metal or resin embossed plate was engraved or etched to form a concavo-convex pattern on the surface, and the medium was pressed against the embossed plate to copy the concavo-convex pattern.
Regarding the production of the embossed plate, there is a description in Patent Document 1, for example.

Japanese Patent Laid-Open No. 2004-358862

However, the above-mentioned embossed product is liable to cause handle defects.
Patterned wrinkles are a phenomenon in which areas with high and low light intensity appear unevenly due to reflected light or shadows caused by light irradiated on the object surface, and the unevenness appears to be a new pattern. .
Of these handle tiles, those that are inconvenient as designs are deleted and modified so that they do not appear in the product.In the past, an embossed version was prototyped to check if there was a handle handle, and then The confirmation work was done. The embossed plate is obtained through processes such as engraving and etching, and its production takes time. Also, if there was a handle, the embossed version was wasted because it was not used thereafter.

  The present invention has been made in view of such a problem, and provides a handle pattern visualization device, a pattern pattern visualization method, and a program capable of confirming a pattern pattern of a medium having a concavo-convex pattern on the surface by an image. Objective.

In order to solve the above-described problem, the first invention reflects each pixel of the height field by reflecting the shadow and occlusion caused by the viewpoint and the light source set for the height field arranged on the input XY plane. Calculating means for generating a projection image in which the pixel value of the pixel corresponding to the XY coordinates of the height field is the luminance value; and output means for outputting the projection image generated by the calculation means , A handle collar visualization device.

  Here, the occlusion means an area that is blocked by an object and cannot be seen from the viewpoint position.

According to the pattern bud visualization apparatus of the first invention, each pixel of the height field reflects the shadow and occlusion generated by the viewpoint and the light source set for the height field arranged on the input XY plane. Is calculated, and a projection image in which the pixel value of the pixel corresponding to the XY coordinates of the height field is the luminance value is generated and output. For this reason, it becomes possible to confirm the handle of the medium having a concavo-convex pattern on the surface by an image, and it becomes unnecessary to manufacture an embossed plate for checking the handle. In addition, since the shadow and occlusion corresponding to the viewpoint direction and the light source direction are taken into account, the handle can be accurately visualized.

Further, the calculation means includes determination means for determining whether or not each pixel of the height field is the shadow or occlusion, and the luminance value is set to 0 for a pixel determined to have the shadow or occlusion by the determination means. Or smaller than other pixels.
As a result, pixels that become shadows or occlusions can be made darker than other pixels, so that the pattern can be expressed in the same manner as in the actual environment.

Further, it is preferable that a blurring unit that performs blurring processing on each pixel of the projection image is further provided, and the image output by the output unit includes an image that has been subjected to blurring processing by the blurring unit.
Thereby, an image as if the design was observed from a distant place can be output, which is suitable for checking the handle for large-sized objects such as wallpaper.

Further, it is desirable that the projected image is an image representing the luminance value of each pixel calculated by the calculation means as grayscale information, binary information, or hue information.
As a result, the pattern can be observed based on the shading, binary (white / black, etc.) or hue of the image, so that the confirmation work is facilitated.

A second invention is a method for visualizing a handle by a computer, wherein a shadow and occlusion caused by a viewpoint and a light source set by a control unit of the computer with respect to a height field arranged on an input XY plane And calculating a luminance value of each pixel of the height field , and generating a projection image in which the pixel value of the pixel corresponding to the XY coordinates of the height field is the luminance value; and An output step of outputting the projection image generated by the calculation step.

Here, the calculation step includes a determination step in which the control unit determines whether or not each pixel of the height field is the shadow or occlusion, and for the pixel determined to have the shadow or occlusion in the determination step It is preferable to calculate the luminance value as 0 or smaller than other pixels.

In addition, it is preferable that the control unit further includes a blurring step for performing a blurring process on each pixel of the projection image, and the image output by the output step includes an image subjected to the blurring process. .

  Further, it is desirable that the projected image is an image that represents the luminance value of each pixel calculated in the calculation step as grayscale information, binary information, or hue information.

A third invention is a computer-readable program that reflects shadows and occlusions caused by a viewpoint and a light source set with respect to a height field arranged on an input XY plane. Calculating a luminance value of each pixel of the height field , and generating a projection image in which the pixel value of the pixel corresponding to the XY coordinates of the height field is the luminance value, the projection image generated by the calculation unit Is a program for functioning as output means.

According to the program of the third invention, by using a computer, the shadow and occlusion caused by the viewpoint and the light source set for the height field arranged on the input XY plane are reflected, and the height field of the height field is reflected. The brightness value of each pixel is calculated, and a projection image in which the pixel value of the pixel corresponding to the XY coordinates of the height field is the brightness value can be generated and output. For this reason, the handle of the medium having a concavo-convex pattern on the surface can be confirmed by a computer.

  According to the present invention, it is possible to provide a handle pattern visualization device, a pattern pattern visualization method, and a program capable of confirming a pattern pattern of a medium having a concavo-convex pattern on the surface by an image.

Hardware configuration diagram of handle pattern visualization device 1 Flowchart explaining the flow of handle pattern visualization processing Example of input height field 29 The figure which shows an example of the setting of a light source direction and a viewpoint direction Illustration explaining shadows and occlusion The figure explaining the shadow / occlusion determination for the pixel of interest Flow chart explaining the flow of shadow / occlusion determination processing The figure which shows an example of the normal vector of an attention pixel, Diagram showing examples of viewpoint vector, light source vector, normal vector, and regular reflection vector on the medium surface The figure which shows the example of a color setting at the time of expressing an output image by hue information Diagram showing an example of output image The figure which shows the example of the confirmation position of the design in the actual pattern check operation The figure which shows an example of the output image which performed the blurring process further on the output image

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram illustrating a hardware configuration of the handle limp visualization apparatus 1 according to the present embodiment.

  As shown in FIG. 1, the handle pattern visualization apparatus 1 includes, for example, a control unit 3, a storage unit 5, a media input / output unit 7, a communication control unit 9, an input unit 11, a display unit 13, and a peripheral device I / F unit 15. Etc. are connected via a bus 17.

The control unit 3 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like.
The CPU calls and executes a program stored in the storage unit 5, ROM, recording medium or the like to a work memory area on the RAM, and drives and controls each unit connected via the bus 17. The CPU of the control unit 3 executes a handle collar visualization process (see FIG. 2) described later.

  The ROM permanently holds a computer boot program, a program such as BIOS, data, and the like. The RAM temporarily stores the loaded program and data, and includes a work area used by the control unit 3 to perform various processes.

  The storage unit 5 is an HDD (hard disk drive), and stores a program executed by the control unit 3, data necessary for program execution, an OS (operating system), and the like. These program codes are read by the control unit 3 as necessary, transferred to the RAM, and read and executed by the CPU.

  The media input / output unit 7 (drive device) is a media input / output device such as a floppy (registered trademark) disk drive, PD drive, CD drive, DVD drive, and MO drive, and performs data input / output.

The communication control unit 9 includes a communication control device, a communication port, and the like, is a communication interface that mediates communication with the network 19, and performs communication control.
The input unit 11 is an input device such as a keyboard, a pointing device such as a mouse, or a numeric keypad, and outputs input data to the control unit 3.

  The display unit 13 includes a display device such as a liquid crystal panel or a CRT monitor, and a logic circuit (video adapter or the like) for executing display processing in cooperation with the display device, and is input under the control of the control unit 3. Display information is displayed on a display device.

  The peripheral device I / F unit 15 is a port for connecting a peripheral device to the computer, and the computer transmits and receives data to and from the peripheral device via the peripheral device I / F unit 15. The peripheral device I / F unit 15 is configured by USB, IEEE 1394, RS-232C, or the like, and usually has a plurality of peripheral devices I / F. The connection form with the peripheral device may be wired or wireless.

  The bus 17 is a path that mediates transmission / reception of control signals, data signals, and the like between the devices.

Next, with reference to FIG. 2 to FIG.
FIG. 2 is a flowchart showing the flow of the handle heel visualization process performed by the handle bud visualization device 1.

  The control unit 3 of the stalk visualization device 1 reads out the program and data related to the stalk visualization process of FIG. 2 from the storage unit 5 and executes processing based on this program and data.

First, the data of the height field 29, which is a medium to be processed, is input to the handle collar visualization device 1 (step S101). An example of the input height field 29 is shown in FIG. In FIG. 3, information in the depth direction of the height field 29 is expressed by shading.
The control unit 3 executes a process for virtually setting the light source direction and the viewpoint direction with respect to the input height field 29. The setting process of the light source direction and the viewpoint direction is preferably performed by an interactive process with the user using the input unit 11 and the display unit 13 (step S102).
For example, as shown in FIG. 4, the projection direction is set to the vertical direction with respect to the projection plane (XY plane) 33 parallel to the height field 29. The light source direction and the viewpoint direction are set to arbitrary directions.

  Next, the control unit 3 of the handle pattern visualization device 1 executes a shadow and occlusion determination process for the height field 29 (step S103).

Here, the shadow and the occlusion will be described with reference to FIG.
The shadow is an area where the light from the light source is not directly reflected, and the occlusion is an area that is not visible from the viewpoint. These areas are darker than other areas.
As shown in FIG. 5, when a light source and a viewpoint are set at a predetermined angle with respect to a medium (height field 29) having an uneven surface, shadows and occlusions may occur in a region deeper than an adjacent region. is there. In the present embodiment, the luminance value of the shadow and occlusion area is set to 0 or a value smaller than other areas.

  In the shadow / occlusion determination process in step S103, it is determined whether or not each pixel in the height field 29 has a shadow / occlusion. Whether there is a shadow or occlusion may be determined by determining whether the target pixel is visible from the light source position or whether the target pixel is visible from the viewpoint position. In other words, this is nothing but a determination as to whether or not the target pixel Q is visible from an arbitrary point P. The light source and the viewpoint are defined as the same in this determination process.

FIG. 6 is a diagram in which an arbitrary light source (or viewpoint) P is set in the height field 29 set in the X, Y, and Z planes.
The vector from the viewpoint P to the pixel of interest Q is PQ, the pixels Q and P are projected perpendicularly to the XY plane are the pixels Q ′ and P ′, and the heights of the pixels Q ′ and P ′ are Qh, respectively. , Ph. Further, a certain pixel on a straight line connecting the pixel Q ′ and the pixel P ′ is set as a scanning target, and the pixel R ′ is called a scanning pixel. A point obtained by vertically projecting the scanning pixel R ′ onto the vector PQ (that is, the line of sight) is defined as a point R. The height of the height field 29 of the scanning pixel R ′ is Rh.

  In the shadow / occlusion determination process in step S103, the control unit 3 scans the scanning pixel R 'on the XY plane from the target pixel Q' to the pixel P '. The scanning direction is the direction of vector Q'P '. FIG. 7 shows a flow of shadow / occlusion determination processing performed for each scanning pixel R ′.

As shown in FIG. 7, the control unit 3 first acquires the position of a certain scanning pixel R ′ and the height Rh of the height field 29 in the scanning pixel R ′ (step S201).
Next, the control unit 3 obtains the height Qh of the start pixel Q ′ from the height field 29 and calculates the distance (the length of the vector RR ′) to the line of sight PQ at the scanning pixel R ′ (step S202). ).
The length of the vector RR ′ in the scanning pixel R ′ is calculated by the following equation (1).

  Next, the control unit 3 compares the length of the vector RR 'with the height Rh of the scanning pixel R' (step S203). If RR ′ <Rh (step S203; Yes), it means that the point Q to the point P are blocked by the height Rh of the pixel R ′ and cannot be seen, and the determination result that the point Q is a shadow or an occlusion is obtained. Output (step S204). The control unit 3 ends the determination process and returns the determination result to step S103 in FIG. If it is determined in step S103 that the target pixel Q 'is a shadow or occlusion, the luminance value of the pixel Q' is set to the luminance value of the shadow or occlusion. In the present embodiment, the luminance values of shadows and occlusions are 0 or smaller than other areas.

  On the other hand, in the comparison process of step S203 of FIG. 7, if RR 'is equal to or greater than Rh (step S203; No), it is determined that the point P can be seen from the point Q. The controller 3 determines whether or not scanning has been completed for all the pixels on the scanning line P′Q ′ (step S205), and if scanning has not been completed (step S205; No), the position of the scanning pixel R ′. Is moved to the next pixel (step S206), and the processing of step S201 to step S205 is repeatedly executed for the next scanning pixel R ′.

  If the scanning pixel R ′ is determined to be a shadow or an occlusion in the repetitive processing (step S203; Yes), the point Q becomes a shadow or an occlusion. On the other hand, if all the pixels R ′ on the scanning line P′Q ′ are not determined to be shadows or occlusions (step S205; Yes), the determination result that the point Q is not a shadow or occlusion is transferred to step S103 in FIG. Return (step S207), and the determination process is terminated.

  If it is determined in step S103 of FIG. 2 that the pixel of interest is neither a shadow nor an occlusion, the luminance value of the pixel of interest is calculated (step S105).

In the luminance value calculation process, the control unit 3 of the handle heel visualizing device 1 calculates a tangent vector that indicates an altitude difference between the pixel of interest and neighboring pixels in the vicinity of the surrounding four. As shown in FIG. 8, the tangent vector with the right adjacent pixel is T _r , the tangent vector with the lower adjacent pixel is T _d , the tangent vector with the left adjacent pixel is T _l , and the upper adjacent pixel is The tangent vector is T _u , the height of the surface shape at the position (x, y) is z _{x, y} , the distance from the left and right adjacent pixels, that is, the height field width direction is Δx, and the upper and lower adjacent pixels are When the distance, that is, the vertical direction of the height field is Δy, each tangent vector is expressed by the following equations (2) to (5).

T _r = (Δx, 0, (z _{x + 1, y} −z _{x, y} )) (2)
T _d = (0, Δy, (z _{x, y + 1} −z _{x, y} )) (3)
T _l = (− Δx, 0, (z _{x−1, y} −z _{x, y} )) (4)
T _u = (0, −Δy, (z _{x, y−1} −z _{x, y} )) (5)

Next, the control unit 3 calculates a normal vector N _{i, j} that is an average of normal vectors in the vicinity of the periphery 4 of the target pixel.
First, the control unit 3 calculates a normal vector represented by 4 near the tangent vector _{T r, T d, T l} , the following equation from the outer product of _{T u (6) ~ (9} ) of the pixel of interest.

_{N lu = T l × T u} ···· (6)
N _ur = T _u × T _r (7)
N _rd = T _r × T _d (8)
N _dl = T _d × T _l (9)

Then, the control unit 3, the normal vector _N lu _above, N _ur, calculates the average of the N _{rd, N dl,} the normal vector _{N i} of the target _pixel, and _j. The normal vector N _{i, j} of the pixel of interest is expressed by the following equation (10).

_{Ni , j} = ( _Nlu + _Nur + _Nrd + _Ndl ) / 4 (10)

  Next, the control unit 3 calculates a light source vector L shown in FIG. 9 from the light source direction set in the light source direction / viewpoint direction setting process in step S102. Assuming that the elevation angle of the light source is θ and the azimuth angle is φ, the light source vector L is expressed by the following equation (11).

  L = (cos θ cos φ, cos θ sin φ, sin θ) (11)

  The control unit 3 calculates a regular reflection vector R of the light ray from the normal vector N and the light source vector L of the target pixel. The regular reflection vector R is expressed as the following equation (12).

  R = (2 × N) × (L · N) −L (12)

  As with the light source vector L, the viewpoint vector W in the viewpoint direction is also expressed by Expression (11) from the viewpoint direction set in step S102.

  Next, the control unit 3 calculates the cosine of the angle formed by the viewpoint vector W and the regular reflection vector R. Here, an angle formed by the viewpoint vector W and the regular reflection vector R is α. The cosine cos α is calculated by the following equation (13).

  cos α = (W · R) / (| W | × | R |) (13)

  Next, the control unit 3 calculates the cosine of the angle formed by the normal vector N and the light source vector L. Here, the angle formed by the normal vector N and the light source vector L is β. The cosine cos β is calculated by the following equation (14).

  cos β = (L · N) / (| L | × | N |) (14)

  The luminance value of each pixel of the medium by the light emitted from the light source is obtained by adding the diffuse reflection and specular reflection components.

Luminance value I _d by diffusion reflected light, based on the Lambert's cosine law is expressed by the following equation (15).

I _d = I _i · k _d · cos β (15)

The luminance value I _s of specular reflected light, based on the reflection model of phone, it is expressed by the following equation (16).

I _s = I _i · k _s · cos ⁿ α (16)

Here, the intensity of incident light is I _i , the luminance value by diffuse reflected light is I _d , the luminance value by specular reflected light is I _s , the diffuse reflectance indicating the intensity of reflection is k _d , and the intensity of gloss is The specular reflectance is represented by k _s , and the coefficient representing the sharpness of gloss is represented by n.
The incident light intensity I _i , diffuse reflectance k _d , specular reflectance k _s , and coefficient n representing the sharpness of the gloss are constants, which may be fixed values or set by the user. These are determined by the material of the medium.

As described above, the control unit 3 calculates the luminance value I _o of each pixel of the medium by the light emitted from the light source by the following equation (17).

Io = I _d + I _s = I _i (k _d cos β + k _s cos ⁿ α) (17)

When the luminance value is set for each pixel by the above calculation, the control unit 3 of the handle pattern visualization device 1 then projects and converts the luminance value of each pixel calculated in step S104 or S105 in the vertical direction of the medium. (Step S106).
In the case of parallel projection, the x and y coordinates of the pixel of interest do not change before and after conversion, so the calculated luminance value is the value at the x and y position of the original pixel. The projection conversion is not limited to parallel projection, and may be perspective projection, for example.
The control unit 3 stores the luminance value of the pixel after projection conversion in the luminance data memory (step S107).

  Next, the control unit 3 of the handle rod visualization device 1 determines whether or not the processing in steps S103 to S107 has been completed for all the pixels in the height field 29 (step S108), and the processing for all the pixels has been completed. If not, the process moves to the next pixel (step S109), and the processes in steps S103 to S107 are repeated. When the processing of step S103 to step S107 is performed for all the pixels in the height field 29 by the repetition processing (step S108; Yes), the control unit 3 displays an image corresponding to the luminance value of each pixel stored in the luminance data memory. It outputs as an output image (step S110).

  In step S110, the control unit 3 of the handle collar visualization apparatus 1 normalizes the luminance value to a value corresponding to the number of gradations (for example, an integer in a predetermined range such as 0 to 255, an integer of 0 or 1), and the gray scale. It is displayed as an image or hue image, output to a file, or printed on a printing device.

  When the luminance value is normalized to an integer from 0 to 255 and the numerical value is converted into a density value and output, a grayscale image of 256 gradations is output. When the luminance value is normalized to an integer of 0 or 1, it is output as a binary image.

  When the luminance value is normalized to an integer from 0 to 255, for example, and the numerical value is converted into hue data composed of a combination of R, G, and B as shown in FIG. 10, a hue image is output. .

  The output image shown in FIG. 11 is an image in which the handle pattern is visualized by performing the pattern handle visualization process on the height field 29 of the fabric-like design shown in FIG. In order to make it easy to understand the effect of the main pattern wrinkle visualization process, the input image of FIG. 3 is rubbed with an alphabetic capital letter “A” as a handle different from the original design. The specific method for rubbing increases the tendency that the part of the capital letter “A” includes a shape in which the intensity of light is increased, and decreases the tendency to include a shape in which the intensity of light is increased in a region other than the capital letter “A”. doing. When FIG. 11 is visually observed on the display device, depending on the viewpoint angle, the shading partially emerges and the capital letter “A” of the alphabet can be recognized as a handle. In FIG. 11, the handle is shown by shading, but can be recognized more clearly if expressed by a change in hue.

In the actual pattern check operation, the design is checked from the positions of the three patterns shown in FIG.
(A) A confirmer stands at a predetermined distance (about several meters) away from the wallpaper on which the design is applied, shines light from an oblique direction (γ ₁ = about 15 °), and the opposite direction (γ ₂ = 15) The person who confirms it visually observes the angle.
(B) The arrangement of the wallpaper is rotated 90 degrees, and the confirmer visually observes the same as (a) above.
(C) The position of the light source is the same as in (a), and the viewpoint is the direction that makes 90 degrees with the azimuth angle of the light source.

  Accordingly, the light source direction and the viewpoint direction set in step S102 of the pattern bud visualization process in FIG. 2 can also be set in the patterns shown in FIGS. 12 (a), (b), and (c). desirable. However, it does not hinder setting other light source directions and viewpoint directions, and it is desirable that appropriate light source directions and viewpoint directions are set as necessary.

In general, wallpaper or the like is often visually recognized from a position several meters away, so that it may be visually blurred when viewing the handle.
Therefore, a blurring process may be further performed on the output image of FIG.

The blurring process is, for example, applying a weight to the pixels around the pixel of interest (the range when blurring), adding them, and dividing the result by the number of pixels. The range for blurring, that is, the shape of the filter is generally a square, a rectangle, a circle, an ellipse, or the like, but it is preferable to adopt an ellipse in the handle hull visualization device 1 of the present invention. This is because the viewpoint position when the observer sees the wallpaper is oblique to the wallpaper, so even if the observer looks at the circle on the projection plane, an elliptical area is projected on the wallpaper. It is. That is, the observer can be regarded as observing a value obtained by integrating the luminance values of the elliptical area.
FIG. 13 is an image obtained by performing a blurring process on the output image of FIG. The capital letter “A” of the alphabet, which is a handle different from the original design, can be confirmed in the center.

  As described above, the handle hull visualization device 1 according to the embodiment of the present invention sets the light source direction and the viewpoint direction with respect to the medium surface, and uses the height field 29 of the medium, the set light source direction, and the viewpoint direction. Then, a luminance value considering shadow and occlusion is calculated, projected onto the projection plane 33, and this projection image is output. The output projection image is converted into an output image such as a gray scale image, a binary image, or a hue image and output. Therefore, it becomes possible to confirm the handle resulting from the unevenness of the medium surface as an image, and it becomes unnecessary to manufacture an embossed plate for checking the handle. In addition, since the shadow and occlusion corresponding to the viewpoint direction and the light source direction are taken into account, the handle can be accurately visualized.

  Further, the control unit 3 determines whether or not each pixel of the height field 29 has a shadow or occlusion, and for a pixel determined to have a shadow or occlusion, the luminance value of the pixel is set to 0, Alternatively, since it is set to be smaller than other pixels, a pixel that becomes a shadow or occlusion can be made darker than other regions, and a pattern can be expressed as in the actual environment.

Further, if the output image is subjected to a blurring process, an image as if the design was observed from a distance can be output, which is suitable for a work of confirming habit of a large object such as wallpaper.
In addition, since the output image is expressed as shading information, binary information, or hue information, it becomes possible to easily observe the pattern by using the shading, binary (white / black), or hue of the image. .

  The preferred embodiments of the handle checker and the like according to the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

DESCRIPTION OF SYMBOLS 1 .... Pattern handle visualizing device 3 ... Control part 5 ... Memory | storage part 7 ... Media input / output part 9 ... Communication control part 11 ...・ Input unit 13 ・ ・ ・ ・ Display unit 15 ・ ・ ・ ・ Peripheral equipment I / F unit 17 ・ ・ ・ ・ Bus 19 ・ ・ ・ ・ Network 29 ・ ・ ・ ・ Height field 33 ・ ・ ・ ・ Projection plane P ・ ・... Viewpoint (light source)
Q: Height field of the target pixel Q ′: Target pixel R: Height position of the line of sight PQ at the scanning pixel R ′ R ′: Scanning pixel

Claims (9)

The brightness value of each pixel of the height field is calculated by reflecting the shadow and occlusion caused by the viewpoint and light source set for the height field arranged on the input XY plane, and the XY coordinates of the height field are calculated. Computing means for generating a projection image in which the pixel value of the pixel corresponding to is the luminance value ;
Output means for outputting the projection image generated by the computing means;
A handle collar visualization device comprising: The computing means is
Determination means for determining whether each pixel of the height field is the shadow or occlusion,
2. The stalk visualization apparatus according to claim 1, wherein the brightness value is calculated to be 0 or smaller than other pixels for a pixel determined to have shadow or occlusion by the determination unit. The image processing apparatus further includes a blurring unit that performs a blurring process on each pixel of the projection image.
The pattern bud visualization apparatus according to claim 1, wherein the image output by the output unit includes an image subjected to a blurring process by the blurring unit.   The pattern projection visualizing device according to claim 1, wherein the projected image is an image representing the luminance value of each pixel calculated by the computing unit as grayscale information, binary information, or hue information. . A computer-aided pattern visualization method performed by a computer,
The control unit of the computer calculates the luminance value of each pixel of the height field, reflecting the shadow and occlusion caused by the viewpoint and the light source set for the height field arranged on the input XY plane. A calculation step of generating a projection image in which the pixel value of the pixel corresponding to the XY coordinates of the height field is the luminance value ;
An output step in which the control unit outputs the projection image generated by the calculation step;
A method for visualizing the handle pattern. The calculation step includes:
The control unit includes a determination step of determining whether each pixel of the height field is the shadow or occlusion,
6. The pattern hull visualization method according to claim 5, wherein the luminance value is calculated to be 0 or smaller than other pixels for pixels determined to have shadow or occlusion in the determination step. The control unit further includes a blurring step of performing a blurring process on each pixel of the projection image,
The method according to claim 5, wherein the image output by the output step includes an image subjected to the blurring process.   The pattern projection visualization method according to claim 5, wherein the projection image is an image in which the luminance value of each pixel calculated in the calculation step is represented as grayscale information, binary information, or hue information. . A computer-readable program,
The computer,
The brightness value of each pixel of the height field is calculated by reflecting the shadow and occlusion caused by the viewpoint and light source set for the height field arranged on the input XY plane, and the XY coordinates of the height field are calculated. Computing means for generating a projection image in which the pixel value of the pixel corresponding to
Output means for outputting the projection image generated by the computing means;
Program to function as.