JP2000149052A - Image processor and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image processor which improves the apparent drawing capability, in place of deterioration in image quality of a partial screen and then attains real-time drawing with high resolution. SOLUTION: This image processor draws n image on a display storage means and shows this image via a display means. The image processor consists of a drawing processing means and a display processing means. The drawing processing means sorts the display area parts requiring no high image quality into the low resolution effective and invalid pixels for the image that is shown on the display means and draws the image on the display storage means, excluding the low resolution ineffective pixels by a validity decision means 123 and via a hidden surface processing means 124, a texture mapping means 125 and a frame buffer drawing means 126.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image processing apparatus having improved real-time drawing capability and a storage medium therefor.

More specifically, the present invention improves the image quality of a region of interest in view of the fact that the gaze of a player enjoying a game is concentrated in an area where attention is paid in the displayed image. The present invention relates to an image processing apparatus having an apparently improved drawing capability by reducing the image quality of other areas and a storage medium storing a program for causing a computer to realize the processing operation of the image processing apparatus. is there.

[0003]

2. Description of the Related Art It is well known that a still image generally requires the same precision over the entire area of the image. Also, in the case of a moving image displayed in real time, conventionally, the entire area of the image has been drawn with the same precision.

An image processing apparatus for generating and displaying such a moving image draws a screen on a display storage means in real time by executing an application program, and displays the screen drawn on the display storage means on a display means in real time. Is displayed. As an apparatus to which such an image processing apparatus is applied, for example, there is a game apparatus.

In such an image processing apparatus for drawing and displaying in real time, since the time for drawing one screen in the display storage means is predetermined, if the drawing ability is insufficient, , The screen will be displayed without being completely drawn. This drawing capability requires a higher drawing capability as the screen becomes higher in resolution. In other words, since it is important for this drawing capability to express a predetermined image in a limited time, a high-speed rendering performance is required, and the drawing efficiency (for drawing one screen) is required. (Meaning the actual drawing time with respect to the time required) greatly depends on the number of pixels in the display storage means.

[0006]

However, depending on the contents of an application such as a game, it is often not necessary to provide high image quality over the entire screen. For example, in the case of a game like a drive simulator,
Most of the player's eyes are concentrated near the center of the screen,
There is little need to increase the image quality up to the image quality at the periphery of the screen.

Further, in the above-described conventional image generating apparatus, a high-speed display storage means and a processing circuit are required to realize high-speed rendering performance, and components of the circuit are expensive. There are disadvantages.

In view of the above-mentioned characteristics, the present invention enhances the image quality to which the player pays attention, and reduces the image quality of the screen to which the player does not pay attention, thereby increasing the apparent drawing ability. It is an object of the present invention to provide an improved image processing device and a storage medium storing a program for realizing the operation of the device by a computer device.

In short, the present invention is to improve the apparent drawing ability instead of lowering the image quality of a part of the screen, and to provide an image processing apparatus capable of real-time high-resolution drawing. is there.

[0010]

In order to achieve the above object, an image processing apparatus according to the first aspect of the present invention draws on a display storage means and displays the drawn image on the display storage means. In the image processing apparatus for displaying on the means, a display area portion of the image to be displayed that does not require high image quality is defined as a low resolution area, and the low resolution area is defined as a set of low resolution pixels formed of a predetermined number of pixels, Drawing processing means for performing drawing processing for each pixel, and display processing means for displaying pixel data read for each of the low resolution pixels when an image is read from the display storage means and displayed on the display means. It is characterized by having.

In the invention according to claim 2, the drawing processing means includes an effective pixel determination circuit, and determines whether or not the image is in the low resolution area by the effective pixel determination means when drawing an image. Sometimes, drawing is performed for each low-resolution pixel of the display storage unit, and at other times, a unit that performs high-resolution drawing processing on the display storage unit is provided.The display processing unit includes an effective pixel determination circuit. A means for reading out normal pixel data from the display storage means by means of the effective pixel determination means in the area other than the low resolution area, and reading out pixel data for each low resolution pixel in the low resolution area and executing display processing. It is characterized by the following.

According to a third aspect of the present invention, the effective pixel determination circuit is capable of setting an invalid pixel area in accordance with a command from an application program.

[0013] In the invention described in claim 4, the display storage means comprises a low-resolution area composed of a set of low-resolution pixels consisting of a predetermined number of pixels, and the unit low-resolution pixels are defined as low-resolution effective pixels. Composed of low-resolution non-effective pixels,
It is characterized in that pixel data is written only in low resolution effective pixels.

According to a fifth aspect of the present invention, the drawing processing means includes an effective pixel determination circuit, and determines whether or not the image is in a low resolution area by the effective pixel determination means when drawing an image. In the case of, it is further determined whether the low-resolution pixel is a low-resolution non-effective pixel or a low-resolution effective pixel. Means for performing drawing on the pixel and not performing drawing processing on the display storage means when a low-resolution non-effective pixel is provided. The display processing means includes an effective pixel determination circuit. Determine whether or not the resolution area, if the low-resolution area, further determine whether the low-resolution non-effective pixels of low-resolution pixels or low-resolution effective pixels,
If it is not a low resolution area or it is a low resolution area, but it is a low resolution effective pixel, the drawing data is read from the corresponding pixel of the display storage means, and if it is a low resolution ineffective pixel, the pixel data of the low resolution effective pixel is read and displayed It is characterized by comprising means for executing processing.

According to a sixth aspect of the present invention, there is provided a storage medium storing a program for causing a computer to operate the image processing apparatus according to the first to fifth aspects.

Here, the storage medium includes, for example, a floppy disk, a hard disk, a magnetic tape, a magneto-optical disk, a CD-ROM, a DVD, a ROM cartridge, a RAM memory card with a battery backup, a flash memory cartridge, and a nonvolatile RAM. Including cartridges.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of a game device for a driving game to which the image processing device according to the present invention is applied.

In FIG. 1, reference numeral 1 denotes a game device main body. The game apparatus body 1 includes a housing 2 having a shape similar to the shape of a driver's seat of an automobile, and a display 3 provided in front of the housing 2. This housing 2
It comprises a chair 4 on which a player sits and an operating device 5 provided in front of the chair 4. The chair 4 is provided with a vibration generator 6. A vibration generator 7 is also provided near the operation device 5.

The vibration generator 6 includes a vibration generator 6a
And a vibration generator 6b.
a is provided at the lower part of the chair 4, and the vibration generator 6b is provided at a portion of the chair 4 where the waist of the player touches.

The vibration generator 7 includes a vibration generator 7a
And a vibration generator 7b.
a is provided at the base of the handle terminal 5a of the operating device 5, and the vibration generator 7b is provided at the base of the leg terminal 5b of the operating device 5 such as an accelerator pedal and a brake pedal.

The reason why a plurality of vibration generators 6a and 7b are provided apart from each other, or the reason why a plurality of vibration generators 6b and 7a are provided separately from each other. Are arranged at a distance where the vibration is the same as or similar to the actual vibration when the vibration is detected, so that the player can experience the vibration more realistically.

Speaker mounting holes are provided on both front sides of the housing 2 where the operating device 5 is provided. Inside these holes, a speaker 8a for background music and a speaker for sound effects are provided. 8b. Further, speaker boxes are provided on both sides of the chair 4 of the housing 2, and speakers 8c for sound effects are provided inside these speaker boxes.

The housing 2 is provided with a shift lever 5c, and a view change switch, various instruments, lamps and the like (not shown) are provided beside the handle terminal 5a. The game processing board 10 and other circuits are provided inside the housing 2.

FIG. 2 is a block diagram of the game device according to the present embodiment. The game device generally includes a display 3, an operation device 5, an output device 9 including various lamps and instruments, and vibration generating devices 6 and 7, and a speaker 8.

The game processing board 10 includes a central processing unit (CPU) 101, a ROM 102, a RAM 103, a sound device 104, an input / output interface 106, a scroll data processing unit 107, a coprocessor (auxiliary processing unit) 108, and terrain data. ROM 109, geometalizer 110, shape data ROM 111, drawing device 112, texture data ROM 113, texture map RAM 114, display storage means (frame buffer) 115, image synthesizing device 116, D / A converter 117
have.

The CPU 101 includes, via a bus line, a ROM 102 storing a predetermined program and an image processing program, a RAM 103 storing data, sound devices 104a to 104c, an input / output interface 106, a scroll data calculation device 107. , A co-processor 108 and a geometallizer 110. The RAM 103 functions as a buffer, and writes various commands to the geometallizer (display of objects, etc.) and writes data necessary for various calculations. Input / output interface 106
Is a handle terminal 5a, a leg terminal 5b of the operating device 5,
It is connected to a shift lever 5c, a view change switch, and the like.
a, operation signals of the leg terminal 5b, the shift lever 5c, and the like are taken into the CPU 101 as digital quantities. Also,
The output device 9 is connected to the input / output interface 106, and the vibration generation devices 6a, 6b, 7a and / or 7b in the output device 9 operate according to a vibration generation command from the CPU 101, and the chair 4 of the housing 2 and And / or vibrates the operation device 5 according to the content of the game.

Sound devices 104a, 104b, 104
c is connected to the speakers 8a, 8b, 8c via power amplifiers 105a, 105b, 105c, respectively. The sound signals individually generated by the sound devices 104, 104b, 104c are amplified by the speaker 8a after power amplification.
a, 8b and 8c, respectively. In this embodiment, the CPU 101 controls the operation signal from the operation device 5 and the terrain data from the terrain data ROM 109 or the terrain data from the shape data ROM 111 based on the program stored in the ROM 102 as a storage medium. And three-dimensional data such as “terrain, sky, background of various structures, etc.” are read, and at least the behavior calculation (simulation) and the calculation of special effects are performed. The behavior calculation simulates the movement of an enemy in a virtual space. After a coordinate value in a three-dimensional space is determined, a transformation matrix for transforming the coordinate value into a visual field coordinate system and a shape data are used. Data (polygon data) is specified to the geometalizer 110.

The co-processor 108 has the terrain data RO
M109 is connected, and therefore, a predetermined graphic data
Is passed to the co-processor 108 (and the CPU 101). The co-processor 108 is primarily designed to handle floating point operations. As a result, various determinations are made by the co-processor 108 and the determination results are given to the CPU 101, so that the calculation load on the CPU can be reduced. Geometalizer 1
Reference numeral 10 is connected to the shape data ROM 111 and the drawing device 112. As described above, the shape data ROM 111 previously stores shape data composed of a plurality of polygons (three-dimensional data such as characters composed of vertices, terrain, background, etc.). -Data is geometallizer 11
Passed to 0. The geometalizer 110 perspectively transforms the shape data designated by the transformation matrix sent from the CPU 101, and obtains data converted from a coordinate system in a three-dimensional virtual space to a visual field coordinate system.

The drawing device 112 attaches a texture to the converted shape data of the visual field coordinate system, and the frame buffer 1
15 is output. In order to paste the texture, the drawing device 112 is connected to a texture data ROM 113 and a texture map RAM 114, and also to a display storage means (frame buffer) 115. The polygon data is a polygon (polygon: mainly triangular or quadrilateral) composed of a set of a plurality of vertices.
Of the vertices of the square). The terrain data ROM 109 stores relatively coarsely set polygon data that is sufficient for executing a predetermined determination.

On the other hand, the shape data ROM 111 stores information on the shapes constituting the screen such as the enemy and the background.
Data of polygons set more precisely is stored.

The scroll data calculation device 107 calculates data of a scroll screen such as characters (stored in the ROM 102). The calculation device 107 and the frame buffer 115 are composed of an image synthesizing device 116 and D
The display 3 is reached via the / A converter 117. As a result, the polygon screen (simulation result) such as the enemy and the terrain (background) temporarily stored in the frame buffer 115 and the scroll screen of the necessary character information are synthesized according to the specified priority, and the final frame image data is created. -Data is generated. This image data is D
The signal is converted into an analog signal by the / A converter 117 and sent to the display 1a, where the game image is displayed in real time.

FIG. 3 is a block diagram showing a drawing processing means used in the embodiment. In this figure, the drawing processing means 120 sets a display area portion of an image to be displayed which does not require high image quality as a low resolution area, and sets the low resolution area as a set of low resolution pixels constituted by a predetermined number of pixels. The rendering process is executed for each resolution pixel, and specifically includes the following components.

That is, the drawing processing means 120 includes a geometry calculation means 121, a pixel calculation means 122, an effective pixel determination means 123, a hidden surface processing means 124, a texture mapping means 125, a frame buffer drawing means 126, It comprises a Z buffer 127, a texture map RAM 114, and a frame buffer 115. In addition, the geometry calculation means 121 is realized by the geometalizer 110 shown in FIG. A pixel calculation unit 122, an effective pixel determination unit 123,
Hidden surface processing means 124 and texture mapping means 12
5 and the frame buffer drawing means 126 are realized by the drawing device 112 shown in FIG. The geometry calculation means 121 operates under the control of the CPU 101.

FIG. 4 is a block diagram showing a display processing means used in the embodiment. In this figure, the display processing means 130
When an image is read from the display 5 and displayed on the display 3, the pixel data read for each of the low-resolution pixels is displayed, and specifically includes the following components.

That is, the display processing means 130 includes a horizontal / vertical synchronization counter 131, an effective pixel determination means 132,
It comprises a frame buffer display means 133, a frame buffer 115, and a D / A converter 117.
Here, the horizontal / vertical synchronization counter 131 is the image synthesizing device 1
16 is provided inside the effective pixel determination means 132
And the frame buffer display means 133 are realized by the image synthesizing device 116.

The operation of the embodiment having such a configuration will be described.

<Operation of Drawing Processing Unit> FIGS. 5 to 8 are diagrams for explaining the operation of the drawing processing unit. FIG. 5 is a flowchart of the operation, and FIGS. 6 to 8 are used in the embodiment. FIG. 4 is a schematic diagram for explaining the principle of a method of using a frame buffer.

First, the principle of how to use the frame buffer 115 will be described with reference to the schematic diagram shown in FIG. One screen displayed on the display 3 is a frame buffer 115.
It corresponds to. Therefore, for example, it is assumed that one screen is configured by the frame buffer 200 as shown in FIG. It is assumed that the frame buffer 200 for one screen includes 10 × 10 pixels 201 as shown in FIG. An area below the frame buffer 200 for one screen is defined as a low-resolution area 202. This low resolution area 202 is composed of 2 × 2 pixels 20
1 constitutes one low-resolution pixel 203. In the low-resolution area 202, one pixel at the upper left is a low-resolution effective pixel (pixel shaded in the drawing) 201a, and the other three pixels are low-resolution pixels 201b to 201b.
01c.

Next, a general method of using the frame buffer will be briefly described. For example, in FIG. 7, the frame buffer 200 for one screen is arranged from left to right in the figure,
It is also assumed that the raster L moves sequentially from top to bottom. For example, when rendering a triangular polygon 250 in the frame buffer 200, this triangular polygon 2
50 are drawn in the order of the numbers in the figure by rasterization.

Further, when the definition of FIG. 6 is applied to the drawing of the triangular polygon shown in FIG. 7, the drawing effective pixels are the pixels in FIG.

As described above, in the low-resolution area, writing is performed only on the low-resolution effective pixels, and is not performed on the low-resolution non-effective pixels. Therefore, the time required for drawing is reduced, and the apparent drawing performance is improved. Become.

Next, a description will be given with reference to the flowchart shown in FIG. First, the CPU 101 sends a command for setting a low resolution area to the valid pixel determination units 123 and 13.
1 (S501). As a result, the values are set in the registers of the effective pixel determination units 123 and 131.

Next, the vertex data of, for example, the triangular polygon 250 generated by the CPU 101 is sent to the geometalizer 110. The geometry calculation means 121 of the geometallizer 110 converts the coordinate of the triangular polygon 250 and the perspective conversion and converts them into screen coordinates (S).
502, see FIG. 8).

Polygon 25 converted to screen coordinates
The vertex of 0 is further calculated by the pixel calculation unit 122.
The image is decomposed into pixels on the screen, that is, rasterized (S503).

The rasterized pixels are sent to the effective pixel determining means 123. The effective pixel determining unit 123 determines whether the pixel is a pixel to be actually drawn (a drawing effective pixel or a constant resolution effective pixel) or not (S504).

The effective pixel determination means 123 determines whether a pixel is a drawing effective pixel (drawing effective pixel or low resolution effective pixel).
(S504; YES), the hidden surface processing by the next hidden surface processing unit 124, the texture mapping process by the texture mapping unit 125, and the frame buffer drawing process by the frame buffer drawing unit 126 are executed (S505).

If the pixel is not a drawing effective pixel (S504; NO), the valid pixel determining means 123 returns to the processing of step 503.

Then, for example, one triangular polygon 25
The process of steps S503 to S505 is repeatedly performed for each pixel for drawing 0.

Here, a triangular polygon 250 shown in FIG.
, The processing of the numbers “1” to “19” is performed in step S
503 to S505 are performed and the frame buffer 2
Written to 00. Also, this triangular polygon 250
When drawing a portion in the low-resolution area 202, the numbers “20”, “21”, “22”, “23”,
In the process of “24”, the processes of steps S503 to S505 are performed and written in the frame buffer 200.
No writing is performed on the other pixels of 0, which has been processed only in steps S503 and S504.

<Operation of Display Processing Unit> FIGS. 9 and 10 are diagrams for explaining the operation of the display processing unit, and FIG. 9 is a flowchart of the operation. FIG. 10 is a diagram showing the principle relationship between the state of the frame buffer used in the embodiment and the display state on the display means. FIG. 10 (a) shows the frame buffer, and FIG. 10 (b) shows the display. Indicates the state of the screen.

In these figures, the effective pixel judging means 1
32, a low-resolution area is set by the CPU 101 as described above. First, the display process will be described. Generally, display is performed by sequentially reading out the frame buffer 115 one pixel at a time in the horizontal direction from the upper left. An address for reading a pixel from the frame buffer 115 is generated by a horizontal / vertical counter 131 synchronized with a video signal. Therefore, the horizontal / vertical counter 131 is
Is initialized (S551). Thereby, the frame buffer 115 (the frame buffer 200 in FIG. 10)
Is set at the upper left of the buffer.

The address of the pixel generated by the horizontal / vertical counter 131 is sent to the effective pixel determining means 132. The valid pixel determining unit 132 determines whether the address of the pixel is a drawing valid pixel (S552).

Here, when the effective pixel judging means 132 judges that it is the address of a pixel which is not in the low resolution area or the address of a pixel which is in the low resolution area but has a low resolution effective pixel (S552; YES), that pixel is judged. Is taken out (S553). This address is sent to the frame buffer display means 133.

On the other hand, when the effective pixel judging means 132 judges that the address of the pixel corresponds to the low-resolution non-effective pixel (S552; NO), the effective low-resolution pixel 203 of the same low-resolution pixel 203 is determined. The address is taken out (S554). This address is sent to the frame buffer display means 133.

The frame buffer display means 133 is based on the address sent from the effective pixel determination circuit 132.
The pixel data is read from the frame buffer 115 (the frame buffer 200 in FIG. 10) and the display process is executed (S555). Therefore, the frame buffer 11
5 (the frame buffer 200 in FIG. 10) is read out by the frame buffer display means 133 and sent to the display 3 as a display means through the D / A converter 117 to be displayed.

Next, the address of the pixel to be read is moved next (S556), and the flow returns to step 552. The above processing (steps S552 to S556) is repeatedly performed on all the pixels to be displayed, so that the screen is displayed on the display 3 as the display means in real time.

That is, in the low resolution area 202 of the frame buffer 200, in the top row, the pixels "A", "none (blank)", "B", "none", "C", "none",
“D”, “None”, “E”, and “None” are written, and these are read out and displayed on the screen 30 on the display 3.
As 0, "A", "A", "B",
"B""C","C","D","D","E",
"E" will be displayed. Also, in the horizontal row next to the low resolution area 202 of the frame buffer 200,
"None (blank)", "None", "None", "None",
None, None, None, None, None,
The screen on the display 3 with "None" indicates that "A", "A", "B",
"B""C","C","D","D","E",
"E" will be displayed.

Similarly, in the horizontal row further below the low resolution area 202 of the frame buffer 200, the pixels "F", "none", "G", "none", "H", "none", "I" , "None", "J", and "None", which are read out and displayed as a screen 300 on the display 3 in a horizontal row of "F", "F", "G",
"G", "H", "H", "I", "I", "J",
"J" will be displayed. Also, in the horizontal row further below the low resolution area 202 of the frame buffer 200, "none", "none", "none", "none", "none", "none", "none", "none" , “None”, and “none” are displayed on the screen 30 on the display 3.
For 0, "F", "F", "G",
"G", "H", "H", "I", "I", "J",
"J" will be displayed.

In the above-described embodiment, the low-resolution area 102 is set as a partial area on the lower side of the frame buffer 200 in FIGS. 6, 8 and 10, but this low-resolution area is It can be changed arbitrarily by the application.

<Other Embodiments> As described above, according to the embodiments of the present invention, the number of pixels of the entire frame buffer is reduced by lowering the resolution of the area on the screen that is not noticed by the player, The rendering efficiency can be improved. Thereby, the load on the CPU can be reduced.

The present embodiment has the advantage that the number of manufacturing steps can be reduced by simply adding an effective pixel determining means to a general image processing apparatus.

Further, in the present embodiment, since the low resolution area can be arbitrarily set, an image in which the range of the low resolution area is increased or decreased according to the application program can be provided.

In addition, in the above embodiment, as shown in FIG.
Although it was composed of × 2 pixels, the present invention is not limited to this. For example, 2 × 1 pixels, 1 × 2 pixels, 3 ×
3 pixels, 3 × 2 pixels, 2 × 3 pixels, 3 × 1
Pixels, 1 × 3 pixels, 4 × 4 pixels, or more. This may be appropriately selected according to the contents of the application program.

[0065]

FIG. 11 is a diagram for explaining an embodiment of the present invention. In this figure, if one screen 400 has a resolution of, for example, 640 × 480, an area (shaded area) 410 around the screen having a width of ８ of the vertical resolution and the horizontal resolution is a normal 2 × 2 When a double size is assigned to one pixel of the frame buffer to make a low resolution area, the number of pixels of this frame buffer becomes 360
× 480 + (80 × 60 × 28) / 4 = 206,400
(Pixels).

On the other hand, in the case of a normal resolution of 640 × 480 pixels, 640 × 480 = 307,200 (pixels).

Therefore, a comparison between the two results in 206,400 / 307,200 = 0.671875. That is, as in the embodiment of the present invention, when the resolution of a video area to which a player does not pay attention or a video area to which the player does not pay attention is lowered as described above, a normal frame buffer is used. Of about 67%.

As described above, the number of pixels that need to be drawn in the frame buffer can be reduced, so that the time required for drawing can be saved and the real-time drawing capability can be improved.

The area for reducing the resolution is as follows.
Depending on the application program, it is various and it is possible to arbitrarily set this area.

[0070]

As described above, according to the image processing apparatus of the present invention, the number of pixels of the entire frame buffer is reduced by lowering the resolution of the area on the screen to which the player does not pay attention. The rendering efficiency can be improved. Thereby, the load on the CPU can be reduced.

According to the image processing apparatus of the present invention, it is only necessary to add an effective pixel determining means to a general image processing apparatus, and there is an advantage that the number of manufacturing steps can be reduced.

Further, according to the image processing apparatus of the present invention, since the low resolution area can be set arbitrarily, it is possible to provide an image in which the range of the low resolution area is increased or decreased according to the application program.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a game device to which an image processing device according to the present invention is applied.

FIG. 2 is a block diagram of a circuit that executes a game process of the device.

FIG. 3 is a block diagram showing drawing processing means used in the embodiment.

FIG. 4 is a block diagram showing a display processing means used in the embodiment.

FIG. 5 is a flowchart illustrating a display processing operation according to the embodiment;

FIG. 6 is a schematic diagram for explaining the principle of a method of using a frame buffer used in the embodiment.

FIG. 7 is a diagram for explaining the principle of a method of using a frame used in the embodiment.

FIG. 8 is a schematic diagram for explaining the principle of a method of using a frame buffer used in the embodiment.

FIG. 9 is a flowchart for describing a display processing operation in the embodiment.

FIG. 10 is a diagram showing a principle relationship between a state of a frame buffer used in the embodiment and a display state of a display means.

FIG. 11 is a diagram for explaining an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Game device main body 2 Housing 3 Display 4 Chair 5 Operating device 5a Handle terminal 5b Leg terminal 5c Shift lever 6, 6a, 6b, 7, 7a, 7b Vibration generator 8a, 8b, 8c Speaker 9 Output device 10 Game processing Board 101 CPU 102 RAM 103 ROM 107 Scroll data calculation device 109 Test data ROM 110 Geometallizer 112 Drawing device 115 Frame buffer 116 Image synthesis device 121 Geometry calculation means 122 Pixel calculation means 123 Effective pixel determination means 124 Hidden surface processing means 125 Texture mapping means 126 frame buffer drawing means 127 Z-puffer 131 horizontal / vertical synchronization counter 132 effective pixel determination means 133 frame buffer display means

Continued on the front page F-term (reference) 2C001 AA00 AA09 BA00 BA01 BA05 BC00 BC10 BD00 BD07 CA04 CA05 CB01 CB03 CB06 CC02 CC08 5B050 AA10 BA09 BA11 EA26 EA27 5B080 AA13 BA04 CA01 CA09 FA08 GA01 GA22 5C082 AA06 BA27A31A46 CA55 CA81 CB05 DA14 DA15 DA53 DA86 DA87 MM06 MM07 MM10

Claims (6)

[Claims] 1. An image processing apparatus for drawing on a display storage means and displaying an image drawn on the display storage means on a display means, comprising: An area, a low-resolution area is a set of low-resolution pixels configured by a predetermined number of pixels, a drawing processing unit that executes a drawing process for each low-resolution pixel, and an image that is read from the display storage unit and the display unit And a display processing means for displaying the pixel data read out for each of the low resolution pixels when displaying the image data. 2. The image processing device according to claim 1, wherein the image processing unit includes an effective pixel determination circuit.
A means for determining whether or not the image is in a low-resolution area and performing drawing for each low-resolution pixel in the display storage means in the case of the low-resolution area, and executing a high-resolution drawing process in the display storage means in other cases. The display processing means includes an effective pixel determination circuit, and reads out normal pixel data from the display storage means in areas other than the low resolution area by the effective pixel determination means. 2. The image generating apparatus according to claim 1, further comprising: a unit that reads out pixel data and executes a display process. 3. The image processing apparatus according to claim 2, wherein the valid pixel determination circuit is capable of setting an invalid pixel area according to a command from an application program. 4. The display storage means comprises a low-resolution area composed of a set of low-resolution pixels including a predetermined number of pixels,
2. The unit according to claim 1, wherein the unit low-resolution pixel is composed of a low-resolution effective pixel and a low-resolution non-effective pixel, and pixel data is written only in the low-resolution effective pixel. Image processing device. 5. The rendering processing means includes an effective pixel determination circuit, and when rendering an image, the effective pixel determination means
It is determined whether or not it is a low-resolution area, and in the case of a low-resolution area, it is further determined whether or not the low-resolution pixel is a low-resolution ineffective pixel or a low-resolution effective pixel. However, when the pixel is a low-resolution effective pixel, drawing is performed on the pixel in the display storage unit, and when the pixel is a low-resolution ineffective pixel, a unit that does not perform drawing processing on the display storage unit is provided. The effective pixel determination means includes a pixel determination circuit, and determines whether or not the pixel is in the low resolution area. If the pixel is in the low resolution area, further determines whether or not the low resolution pixel is a low resolution ineffective pixel or a low resolution effective pixel. If the pixel is not in the low-resolution area or is in the low-resolution area but is a low-resolution effective pixel, the drawing data is read from the pixel in the display storage means, 5. The image processing apparatus according to claim 2, further comprising a unit that reads out pixel data of a low-resolution effective pixel and executes a display process when the pixel is a pixel. 6. A storage medium storing a program for causing a computer to operate the image processing apparatus according to claim 1.