JP2004287897A - Image processor, image processing method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image processor capable of suitably displaying an object arranged inside a space area of a light volume or the like. <P>SOLUTION: The image processor comprises: a visual field image storage means for storing a visual field image indicating the situation of viewing a virtual three-dimensional space where the object is arranged from a given viewpoint; and a lightness elevating means for increasing the lightness of a lightness elevating area which is an area for which the area indicating the part of the object 44 positioned inside a shadow volume 42 set in the virtual three-dimensional space on the basis of a light source position and the position of the object 44 is excluded from the area indicating the part of the object 44 positioned inside the light volume 40 set in the virtual three-dimensional space corresponding to the light source position of the visual field image. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an image processing apparatus, an image processing method, and a program, and more particularly, to a technique for suitably displaying an object located in a spatial region related to a light source such as a light volume using a stencil buffer.
[0002]
[Prior art]
2. Description of the Related Art There is known an image processing apparatus that sets an object, a light source, and a viewpoint in a virtual three-dimensional space, and displays a visual field image showing a state of viewing the virtual three-dimensional space from the viewpoint on a monitor. In such an image processing apparatus, a state in which an object is illuminated by a light source is usually represented in a visual field image.
[0003]
However, in normal light source processing, it is difficult to express a state in which an object located in a certain limited space area is particularly brightly illuminated, such as a spotlight or a sunbeams. In this regard, in a technique called volume light, a light volume that represents a range through which light rays pass, such as a spotlight or a sunbeam, is prepared, and an object located therein is located at that portion (a portion located within the light volume). To increase the brightness.
[0004]
FIG. 7 is a diagram illustrating a conventional volume write technique. As shown in the figure, in this technology, an invisible light volume 102 is arranged in addition to an object 100 in a virtual three-dimensional space. Then, a portion 104 of the object 100 located within the light volume 102 is displayed with the brightness increased.
[0005]
[Problems to be solved by the invention]
However, in the conventional volume light technology, the light direction is not considered, and even if the light should be blocked by the polygon arranged on the upstream side of the volume light, the light is not reflected on the polygon arranged on the downstream side. There was a case where a video expression as if hitting was given. For example, as shown in FIG. 8, when an object illuminated by light is viewed from the back side, if the conventional volume light technique is used, the object 100 located in the light volume 102 is not displayed. As shown in FIG. 9, there is a problem in that the portion 106 is displayed in a state in which the brightness is increased even though it is on the back side when viewed from the light source side.
[0006]
The present invention has been made in view of the above problems, and has as its object to provide an image processing apparatus, an image processing method, and a program capable of suitably displaying an object arranged in a spatial area such as a light volume. Is to do.
[0007]
[Means for Solving the Problems]
In order to solve the above-described problem, an image processing apparatus according to the present invention includes: a visual field image storage unit configured to store a visual field image representing a state in which a virtual three-dimensional space in which an object is arranged is viewed from a given viewpoint; From an area of the image that represents the portion of the object located in the first space area set in the virtual three-dimensional space corresponding to the light source position, the virtual 3D based on the light source position and the position of the object And a brightness increasing unit for increasing the brightness of the brightness increasing region, which is a region excluding a region representing the portion of the object located in the second space region set in the dimensional space.
[0008]
Further, the image processing method according to the present invention includes a step of storing, in a visual field image storage means, a visual field image representing a state in which a virtual three-dimensional space in which objects are arranged is viewed from a given viewpoint; From the area representing the part of the object located in the first space area set in the virtual three-dimensional space corresponding to the light source position, set in the virtual three-dimensional space based on the light source position and the position of the object A lightness increasing step of increasing the lightness of the lightness increasing area, which is an area excluding the area representing the portion of the object located in the second space area.
[0009]
Further, the program according to the present invention includes a visual field image storage unit that stores a visual field image representing a state in which a virtual three-dimensional space in which objects are arranged is viewed from a given viewpoint, and a visual field image corresponding to a light source position in the visual field image. Then, based on the light source position and the position of the object, a second region set in the virtual three-dimensional space from a region representing the portion of the object located in the first space region set in the virtual three-dimensional space A program for causing a computer to function as brightness increasing means for increasing the brightness of a brightness increasing area, which is an area excluding an area representing a portion of the object located in a spatial area.
[0010]
In the present invention, the first and second space regions are set in a virtual three-dimensional space. The first space area is, for example, a light volume and corresponds to a light source position provided in the virtual three-dimensional space. The second space area is, for example, a shadow volume, and is set in a virtual three-dimensional space based on a light source position and an object.
[0011]
According to the present invention, the brightness increasing area in the visual field image is displayed with the brightness increased. The brightness increase area is an area obtained by removing the area representing the part of the object located in the second space area from the area representing the part of the object located in the first space area. According to the present invention, the second space area is set in the virtual three-dimensional space in relation to the light source position and the object position, and the area representing the part of the object located in the second space area is excluded from the brightness increasing area. Therefore, it is possible to suitably display an object arranged in a spatial area such as a light volume.
[0012]
The lightness increasing means includes a numerical information storage means for storing numerical information in association with each pixel constituting the visual field image, and the first spatial area in the visual field image stored in the visual field image storing means. First numerical information changing means for changing numerical information stored in the numerical information storage means in association with pixels constituting an area representing a portion of the object located in the image processing apparatus; Second numerical information changing means for changing numerical information stored in the numerical information storage means in association with pixels constituting an area representing a portion of the object located in the second space area in the visual field image; And a brightness-increase area determining means for determining the brightness-increase area based on the numerical information stored in the numerical information storage means.
[0013]
Further, the image processing apparatus according to the present invention includes: a visual field image storage unit configured to store a visual field image representing an appearance of a virtual three-dimensional space where a plurality of objects are arranged from a given viewpoint; From a region representing a portion of the plurality of objects located in a first space region set in the virtual three-dimensional space corresponding to a position, the light source position and the positions of the plurality of objects are set in the virtual three-dimensional space. And a brightness increasing unit for increasing the brightness of the brightness increasing area, which is an area excluding an area representing a portion of the plurality of objects located in the first space area.
[0014]
Also, the image processing method according to the present invention includes a visual field image storing step of storing a visual field image representing a state of viewing a virtual three-dimensional space in which a plurality of objects are arranged from a given viewpoint in a visual field image storage unit; Based on the light source position and the positions of the plurality of objects, from an area representing a portion of the plurality of objects located in the first space area set in the virtual three-dimensional space corresponding to the light source position, of the image, A brightness increasing step of increasing the brightness of the brightness increasing area, which is an area excluding an area representing a portion of the plurality of objects located in the second space area set in the virtual three-dimensional space. .
[0015]
Further, the program according to the present invention includes a visual field image storage unit configured to store a visual field image representing a state in which a virtual three-dimensional space in which a plurality of objects are arranged is viewed from a given viewpoint, and a light source position in the visual field image. The virtual three-dimensional based on the light source position and the positions of the plurality of objects from a region of the view image representing a portion of the plurality of objects located in a first space region correspondingly set in the virtual three-dimensional space. A program for causing a computer to function as lightness increasing means for increasing the lightness of a lightness increasing area, which is an area excluding an area representing a portion of the plurality of objects located in a second space area set in a space.
[0016]
In the present invention, the first and second space regions are set in a virtual three-dimensional space. The first space area is, for example, a light volume and corresponds to a light source position provided in the virtual three-dimensional space. The second space area is, for example, a shadow volume, and is set in a virtual three-dimensional space based on a light source position and each object.
[0017]
According to the present invention, the brightness increasing area in the visual field image is displayed with the brightness increased. The brightness increase area is an area obtained by removing the area representing the part of the object located in the second space area from the area representing the part of the object located in the first space area. According to the present invention, the second space area related to the light source position and the object position is set in the virtual three-dimensional space, and the area representing the part of the object located in the second space area is excluded from the brightness increasing area. , An object arranged in a spatial area such as a light volume can be suitably displayed.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
[0019]
FIG. 1 is a diagram showing a configuration of a game device (image processing device) according to an embodiment of the present invention. A game device 10 shown in FIG. 1 is an embodiment of an image processing device according to the present invention, and a DVD-ROM 25 as an information storage medium is mounted on a home game machine 11 connected to a monitor 18 and a speaker 22. It is constituted by. Here, the DVD-ROM 25 is used to supply the game program to the consumer game machine 11, but any other information storage medium such as a CD-ROM or a ROM card can be used. In addition, a game program and game data can be supplied to the home game machine 11 from a remote place via a communication network such as the Internet.
[0020]
The consumer game machine 11 is a known computer game system, in which a microprocessor 14, an image processing unit 16, a main memory 26, and an input / output processing unit 30 are connected via a bus 12 so as to enable mutual data communication. The controller 32, the audio processing unit 20, and the DVD-ROM playback unit 24 are connected to the unit 30. Each component of the consumer game machine 11 other than the controller 32 is housed in a housing. For example, a home television receiver or the like is used as the monitor 18, and the built-in speaker or the like is used as the speaker 22, for example.
[0021]
The microprocessor 14 controls each unit of the consumer game machine 11 based on an operating system stored in a ROM (not shown) and a game program read from the DVD-ROM 25. The bus 12 is used for exchanging addresses and data between the respective parts of the consumer game machine 11. The main memory 26 is configured to include a RAM, and a game program (including game data) read from the DVD-ROM 25 is read / written as necessary, and various data is used for the operation of the microprocessor 14. Read and write. The image processing unit 16 is configured to include a VRAM, receives image data sent from the microprocessor 14, draws a game screen on the VRAM, converts the content into a video signal, and outputs the video signal to the monitor 18 at a predetermined timing. Output.
[0022]
The input / output processing unit 30 is an interface for relaying data communication between the controller 32, the audio processing unit 20, the DVD-ROM reproducing unit 24, and the microprocessor 14. The controller 32 is input means for the player to perform a game operation. The input / output processing unit 30 acquires operation states of various buttons of the controller 32 at a fixed period (for example, every 1/60 second), and passes an operation signal representing the operation state to the microprocessor 14 via the bus 12. The microprocessor 14 determines a game operation of the player based on the operation signal. The audio processing unit 20 includes a sound buffer, and reproduces data such as music and game sound effects read from the DVD-ROM 25 and stored in the sound buffer in accordance with an instruction from the microprocessor 14, and 22. The DVD-ROM playback unit 24 reads a game program recorded on the DVD-ROM 25 according to an instruction from the microprocessor 14.
[0023]
Hereinafter, a procedure for executing an improved light volume process using the image processing apparatus having the above configuration will be described.
[0024]
FIG. 2 is a perspective view showing a part of the virtual three-dimensional space. As shown in the figure, an object 44, an invisible light volume 40, and an invisible shadow volume 42 are arranged in this space. The light source position and the light irradiation direction are virtually set in the virtual three-dimensional space, and the light volume 40 is set to extend in the light irradiation direction. The shadow volume 42 defines a shadow area (spatial area) formed by blocking light emitted from the light source by the object 44. The light source side surface of the object 44 is defined as an end face, and the light irradiation direction is defined. It is set to stretch. The light volume 40 and the shadow volume 42 can be easily set using, for example, various known techniques. The end face of the shadow volume 42 does not always need to coincide with the side face of the object 44 itself, but is prepared in advance in relation to the object 44 and coincides with the side face of the shadow volume object that follows the object 44. You may make it do.
[0025]
In the image processing apparatus according to the present embodiment, a viewpoint is set in the virtual three-dimensional space, and an image showing a state of viewing the virtual three-dimensional space from the viewpoint, that is, a visual field image is stored in the image processing unit 16. Is displayed on the monitor 18. At this time, the visible object 44 is displayed on the monitor 18, and the invisible light volume 40 and shadow volume 42 are not displayed. Instead, a brightness change process is performed on an image area set according to the relationship between the light volume 40 and the shadow volume 42 and the object 44. That is, in the present embodiment, the numerical data (stencil buffer) corresponding to the visual field image shown in FIG. 3 is stored in the image processing unit 16, and the data corresponds to each pixel constituting the visual field image. In addition, numerical information is stored. Then, in the present embodiment, in the same data, “+1” is stored for pixels constituting a screen area representing a portion where the object 44 is located in the light volume 40 in association with those pixels. ing. Further, for pixels constituting a screen area representing a portion where the object 44 is located in the shadow volume 42, "-1" is added to the numerical value associated with those pixels.
[0026]
For this reason, “1” is associated with an area representing a portion inside the light volume 40 and outside the shadow volume 42 of the object 44, and a portion inside the light volume 40 and a portion outside the shadow volume 42 of the object 44. “0” is associated with an area representing a portion in the shadow volume 42, and “−1” is associated with an area representing a portion of the object 44 outside the light volume and representing a portion in the shadow volume 42. Can be “0” is associated with the other areas. When the numerical data corresponding to the visual field image is generated as described above, in the present image processing apparatus, the brightness of the pixel of the visual field image to which a value larger than zero is associated in the numerical data is increased. . When increasing the brightness, it is possible to change the brightness by changing the color information by a predetermined ratio or adding a certain amount based on the color information originally stored in association with each pixel in the visual field image. Thus, according to the present embodiment, the display of the visual field image shown in FIG. 4 can be obtained, and problems such as light penetration can be prevented.
[0027]
FIG. 5 is a functional block diagram of the image processing apparatus according to the present embodiment. As shown in the figure, the image processing apparatus according to the present embodiment functionally includes a display unit 52, a visual field image storage unit 54, a numerical information storage unit 56, a drawing unit 58, an environment information storage unit 60, and an environment processing unit. 62 are included. These functions are realized by the home game machine 11 executing a program stored in the DVD-ROM 25.
[0028]
Here, the visual field image storage unit 54 is configured to include a VRAM provided in the image processing unit 16, and converts a virtual three-dimensional space constructed in the main memory 26 into a given space set in the same space. Is stored in a field-of-view image representing a state seen from the viewpoint of the camera. This field-of-view image stores color information for each pixel constituting the image. The display unit 52 displays the visual field image stored in the visual field image storage unit 54, and includes the monitor 18 here. The numerical information storage unit 56 is configured to include a VRAM (stencil buffer) provided in the image processing unit 16 and stores numerical information for each pixel constituting the visual field image. Here, the numerical information corresponding to each pixel indicates whether the pixel represents a portion of the object 44 located in the light volume 40 or a portion located in the shadow volume 42. The corresponding value will be stored.
[0029]
Specifically, “+1” is stored when representing a portion that is inside the write volume 40 and outside the shadow volume 42, and “0” is shown when representing a portion that is inside the write volume 40 and inside the shadow volume 42. Is stored, and “0” is stored when representing a portion outside the light volume 40 and outside the shadow volume 42, and “−1” when representing a portion outside the light volume and inside the shadow volume 42. Is stored.
[0030]
The environment processing unit 62 performs real-time (for example, every 1/60 second) environmental information including the position and orientation of the object placed in the virtual three-dimensional space, the viewpoint position, the line of sight, the light source position, the color and intensity of light, and the like. , And is mainly configured by the microprocessor 14. The environment information calculated by the environment processing unit 62 is stored in an environment information storage unit 60 including the main memory 26.
[0031]
The drawing unit 58 generates a visual field image that shows the virtual three-dimensional space as viewed from the viewpoint position in the line of sight based on the environment information stored in the environment information storage unit 60, and stores the generated visual field image in the visual field image storage unit 54. To be stored. In addition, the drawing unit 58 includes a region (in the view image stored in the view image storage unit 54) that represents a portion of the object 44 located in the light volume 40 set in the virtual three-dimensional space corresponding to the light source position. Reference numeral 50) excludes a region (see reference numeral 46) representing a portion of the object 44 located in the shadow volume 42 set in the virtual three-dimensional space based on the light source position and the position of the object 44. The storage contents of the visual field image storage unit 54 are updated so as to increase the brightness of the brightness increase area.
[0032]
Specifically, the drawing section 58 associates the numerical information storage section 56 with the pixels constituting the area representing the portion of the object 44 located in the light volume 40 in the view image stored in the view image storage section 54. Is changed so as to increase the numerical information stored in. Also, the numerical information stored in the numerical information storage unit 56 is stored in the numerical information storage unit 56 in association with the pixels constituting the area representing the portion of the object 44 located in the shadow volume 42 in the visual field image stored in the visual field image storage unit 54. Only to decrease. Then, the brightness increasing area is determined based on the numerical information stored in the numerical information storage unit 56, and the brightness of the area in the view image stored in the view image storage unit 54 is increased. Specifically, for a pixel associated with numerical information greater than 0 in the numerical information storage unit 56, the brightness of the color information stored in the visual field image storage unit 54 in association with the pixel increases. Change to
[0033]
FIG. 6 is a flowchart illustrating image processing performed by the image processing apparatus according to the present embodiment. The process shown in the figure is executed at predetermined time intervals (for example, every 1/60 second) according to a program stored in the DVD-ROM 25.
[0034]
In this process, first, the environment processing unit 62 performs environment processing based on a program read from the DVD-ROM 25 (S101). In the environmental processing, the positions and orientations of all static and dynamic objects in the virtual three-dimensional space are calculated. Static objects, such as road objects, mountain objects, grassland objects, etc., do not change their position and orientation in the virtual three-dimensional space even after a lapse of time. On the other hand, a dynamic object changes its position and orientation as time elapses, such as a player character or a car object, which is a player's operation target. The position and orientation of the dynamic object change according to an operation signal input from the controller 32. In the environment processing (S101), the viewpoint, the angle of view, and the range of the visual field (calculated based on the line of sight and the angle of view) are also calculated. Then, in the subsequent processing, only objects located within the visual field range are picked up, and they are set as targets of the subsequent game processing.
[0035]
Next, the drawing unit 58 performs a geometry process (S102). In the geometry processing, coordinate conversion is performed from the world coordinate system to a viewpoint coordinate system (a coordinate system in which the viewpoint is the origin, the front is the Z direction, the horizontal direction is the X direction, and the vertical method is the Y direction). Further, the color information of the vertices of each polygon constituting the object is corrected based on the light source information (color and position of the light source). Further, a clipping process is performed. Further, the drawing unit 58 forms a visual field image based on the vertex coordinates, vertex color information, texture coordinates, and alpha value of each polygon belonging to the visual field range, and stores it in the visual field image storage unit 54 (S103).
[0036]
Next, the drawing unit 58 initializes the numerical information storage unit 56 and stores zero in association with all the pixels constituting the visual field image. In particular, for pixels representing the object portion in the light volume 40, 1 is added to the numerical information (0) stored in the numerical information storage unit 56 in association with the pixels (S104). Further, the drawing unit 58 adds −1 to the numerical information stored in the numerical information storage unit 56 in association with the pixels representing the object portion in the shadow volume 42 (S105). Thereafter, the drawing unit 58 refers to the numerical value information storage unit 56 to determine a pixel associated with a numerical value greater than zero, and stores the color information stored in the visual field image storage unit 54 in association with the pixel. Is changed to increase the brightness (S106). The visual field image whose color information has been changed in this way is read from the visual field image storage unit 54 at a predetermined timing and displayed on the display unit 52.
[0037]
According to the image processing described above, it is possible to prevent a problem that a portion located on the back surface side when viewed from the light source position among the object portions located in the light volume 40 is displayed brightly. Similarly, it is possible to prevent a problem that a portion of the object portion located in the light volume 40, which should be shielded by another object arranged on the light source side, is displayed brightly.
[0038]
Note that the present invention is not limited to the above embodiment.
[0039]
For example, in the above description, only one visible object is arranged in the virtual three-dimensional space, but a plurality of objects may be arranged. In this case, a shadow volume may be set for all objects, or a shadow volume may be set for only some objects (for example, objects located in the light volume that are closest to the light source). Also, a plurality of light volumes may be set.
[0040]
【The invention's effect】
As described above, according to the present invention, it is possible to suitably display an object arranged in a spatial area such as a light volume.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating a hardware configuration of an image processing apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram showing an object, a shadow volume, and a light volume arranged in a virtual three-dimensional space.
FIG. 3 is a conceptual diagram of a numerical information storage unit (stencil buffer).
FIG. 4 is a diagram showing a visual field image displayed on a monitor in the image processing apparatus according to the embodiment of the present invention.
FIG. 5 is a functional block diagram of the image processing apparatus according to the embodiment of the present invention.
FIG. 6 is a flowchart illustrating an image display process performed by the image processing apparatus according to the embodiment of the present invention.
FIG. 7 is a diagram illustrating a conventional volume write technique.
FIG. 8 is a diagram illustrating a problem of a conventional volume write technique.
FIG. 9 is a diagram showing an example of a visual field image displayed on a monitor by a conventional volume light technique.
[Explanation of symbols]
Reference Signs List 10 game device, 11 home game machine, 12 bus, 14 microprocessor, 16 image processing unit, 18 monitor, 20 audio processing unit, 22 speakers, 24 DVD-ROM playback unit, 25 DVD-ROM, 26 main memory, 30 Input / output processing unit, 40, 102 light volume, 42 shadow volume, 44, 100 object, 46 shadow volume inside area, 48 outside area, 50, light volume inside area, 52 display unit, 54 view image storage unit, 56 numerical information Storage unit, 58 drawing unit, 60 environment information storage unit, 62 environment processing unit.

Claims (9)

Field-of-view image storage means for storing a field-of-view image representing a state in which a virtual three-dimensional space in which objects are arranged is viewed from a given viewpoint;
Based on the light source position and the position of the object, from the area representing the part of the object located in the first space area set in the virtual three-dimensional space corresponding to the light source position, An image, comprising: a brightness increasing unit that increases brightness of a brightness increasing region, which is a region excluding a region representing a portion of the object located in a second space region set in a virtual three-dimensional space. Processing equipment. The image processing apparatus according to claim 1,
The brightness increasing means includes:
Numerical information storage means for storing numerical information in association with each pixel constituting the visual field image,
Numerical information stored in the numerical information storage means in association with pixels constituting an area representing a part of the object located in the first space area in the visual field image stored in the visual field image storage means First numerical information changing means for changing;
Numerical information stored in the numerical information storage means in association with pixels constituting an area representing a portion of the object located in the second space area in the visual field image stored in the visual field image storage means Second numerical information changing means for changing;
An image processing apparatus comprising: a brightness-increase region determining unit that determines the brightness-increase region based on the numerical information stored in the numerical information storage unit. Storing, in a visual field image storage means, a visual field image representing a state in which the virtual three-dimensional space in which the objects are arranged is viewed from a given viewpoint;
Based on the light source position and the position of the object, from the area representing the part of the object located in the first space area set in the virtual three-dimensional space corresponding to the light source position, A brightness increasing step of increasing the brightness of the brightness increasing area, which is an area excluding an area representing a part of the object located in the second space area set in the virtual three-dimensional space. Processing method. Field-of-view image storage means for storing a field-of-view image representing a state in which a virtual three-dimensional space in which an object is arranged is viewed from a given viewpoint, and, among the field-of-view images, set in the virtual three-dimensional space corresponding to a light source position From the region representing the portion of the object located in the first space region, the position of the object located in the second space region set in the virtual three-dimensional space based on the light source position and the position of the object. A program for causing a computer to function as lightness increasing means for increasing the lightness of a lightness increasing area which is an area excluding an area representing a portion. Field-of-view image storage means for storing a field-of-view image representing a state in which a virtual three-dimensional space in which a plurality of objects are arranged is viewed from a given viewpoint;
From the area representing the part of the plurality of objects located in the first space area set in the virtual three-dimensional space corresponding to the light source position in the view image, the light source position and the position of the plurality of objects are determined. Brightness increasing means for increasing the brightness of the brightness increasing area, which is an area excluding an area representing a portion of the plurality of objects located in the first space area set in the virtual three-dimensional space. Image processing device. A visual field image storing step of storing, in a visual field image storage means, a visual field image representing a state in which a virtual three-dimensional space in which a plurality of objects are arranged is viewed from a given viewpoint;
Based on the light source position and the position of the plurality of objects from a region representing a portion of the plurality of objects located in a first space region set in the virtual three-dimensional space corresponding to a light source position in the view image. A brightness increasing step of increasing the brightness of the brightness increasing area, which is an area excluding an area representing a portion of the plurality of objects located in the second space area set in the virtual three-dimensional space. Image processing method. A field-of-view image storage means for storing a field-of-view image representing a state in which a virtual three-dimensional space in which a plurality of objects are arranged is viewed from a given viewpoint; and among the field-of-view images, the virtual three-dimensional space corresponds to a light source position. A second space area set in the virtual three-dimensional space based on the light source position and the positions of the plurality of objects from an area of the view image representing a portion of the plurality of objects located in the set first space area A program for causing a computer to function as lightness increasing means for increasing the lightness of a lightness increasing area, which is an area excluding an area representing a portion of the plurality of objects located in the area. 6. The image processing apparatus according to claim 1, wherein the first space area is a light volume. 9. The image processing apparatus according to claim 1, wherein the second space area is a shadow volume.

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