JPH06162165A - Image processor - Google Patents

Abstract

PURPOSE:To paste a moving picture texture to a body by the image processor which is used suitably for a computer game. CONSTITUTION:Moving picture data are compressed and stored on a CD ROM. The compressed moving picture data which are reproduced from the CD-ROM are received through a bus line 1 and expanded. An image composing device 6 is provided with a frame memory 10 composed of a drawing area for displaying the body on a screen and a texture area for decorating the body. The moving data after expansion which are received through the bus line are transferred selectively to both the drawing area and texture area. The texture itself can be rewritten, frame by frame, so a moving picture texture is obtained.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display device suitable for use in playing computer games.

[0002]

2. Description of the Related Art A computer for enjoying computer games is required to have high-speed processing and excellent graphic display ability. Among them, 3D objects can be displayed at high speed,
It is required to realize visual effects such as texture and to display information with a high degree of reality. The texture causes a visual effect peculiar to the three-dimensional object by applying a pattern defined elsewhere on the surface of the three-dimensional object. Conventionally, the pattern pasted on the surface of the object is
It is a geometric pattern or a static pattern such as a photograph or a handwritten pattern.

[0003]

It is desired to realize a variety of computer graphics by using a moving image as a texture pattern. However, in the past,
Since the texture pattern is predetermined and the texture pattern cannot be dynamically rewritten, the texture pattern of the moving image cannot be pasted on the surface of the object.

Therefore, an object of the present invention is to provide an image processing method capable of pasting a texture pattern of a moving image.

[0005]

DISCLOSURE OF THE INVENTION The present invention relates to a data reproducing means for reproducing compressed moving picture data recorded on an information recording medium in which moving picture data is compressed and recorded, and compressed moving picture data reproduced from the data reproducing means. Is transmitted via a bus line, and the image data decompression means for decompressing the compressed moving image data and the image composition means for receiving the decompressed image data from the image data decompression means via the bus line and composing the image data. The image processing device.

In the present invention, the image synthesizing means is provided with the image memory having the drawing area for displaying the object on the screen and the texture area for decorating the object, and the decompression received via the bus line. Subsequent moving image data can be selectively transferred to both the drawing area and the texture area.

[0007]

Since the moving picture information is compressed and recorded on the CD-ROM, the moving picture data can be easily handled. Further, since the texture region is provided in the frame memory, the moving image texture can be realized by rewriting the texture itself for each frame.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. In FIG. 1, the system bus 1 has a CPU
2, a main memory 3, an image decompressor 4, a CD-ROM decoder 5, an image composition device 6, a coordinate conversion device 7, and a DMA controller 8 are connected.

A 32-bit CPU, for example, is used as the CPU 2. The CPU 2 manages the entire system. Further, the CPU 2 performs a sorting process for determining the order of drawing the polygons on the screen.

The image decompressor 4 decompresses an image compressed by the discrete cosine transform (DCT), for example.

The CD-ROM decoder 5 is a CD-ROM
CD-ROM driver 9 connected to driver 9
It decodes the application program and data of the CD-ROM mounted on the. The CD-ROM can record moving image data that is image-compressed by DCT, for example.

The image composition device 6 is connected to the frame memory 10 via a local bus 11. The frame memory 10 is composed of, for example, a two-sided frame memory, and the two-sided frame memory is switched for each vertical cycle. The frame memory 10 has a texture area for storing a texture image and a drawing area for storing an image to be drawn. Furthermore, the frame memory 1
0 is provided with a color lookup table (CLUT). The output image of the image synthesizing device 6 is output via the D / A converter 12.

The image synthesizing device 6 performs gradient calculation and polygon drawing. The polygon data on the main memory 3 sorted by the CPU 2 are transferred to the image synthesizing device 6 in the sorted order. Then, this data is sent to the gradient calculation unit of the image synthesizing device 6 and the gradient calculation is performed. The gradient calculation is a calculation for obtaining the inclination of the plane of the deformed mapping data when filling the inside of the polygon with the mapping data in polygon drawing. In the case of texture, the texture data is used, and in the case of glow shading, the brightness value is used to fill the polygon.

The coordinate transformation device 7 includes a three-dimensional coordinate transformation and a three-dimensional coordinate transformation.
Convert from 2D to 2D on screen. The coordinate conversion device 7 and the main memory 3 are connected to the DMA controller 8
Thus, the data can be DMA-transferred. The coordinate conversion device 7 obtains data from the main memory 3 via the system bus 1, converts the coordinates of the data, and transfers the data to the main memory 3 via the system bus 1 again.

FIG. 2 shows the flow of polygon drawing. When a command is issued from the CPU 2 (step 10
1), the data from the main memory 3 is transferred to the coordinate conversion device 7 via the system bus 1. Three-dimensional coordinate conversion is performed by the coordinate conversion device 7 (step 102), and three-dimensional to two-dimensional conversion is performed (step 103). Then, this data is transferred to the main memory 3 via the system bus 1 and sorted by the CPU 2 (step 104). The data sorted by the CPU2 is
It is sent to the image synthesizing device 6 via the system bus 1. Gradient calculation is performed by the image synthesizing device 6 (step 10
5) A polygon is drawn (step 106). Then, this image is output (step 107).

The frame memory 10 has a texture area for storing a texture image and a drawing area for storing an image to be drawn. That is, FIG. 3 shows the memory space of the frame memory 10. The frame memory 10 is addressed by two-dimensional addresses of columns and rows. Area A in this two-dimensional address space
Texture areas are T1, AT2, AT3, ....
A plurality of types of texture patterns can be arranged in these texture areas AT1, AT2, AT3, .... AD1 is a drawing area, and the screen to be drawn is developed in this drawing area AD1. AC1, AC2, and AC3 are color look-up table (CLUT) areas.

When a texture is pasted on the surface of an object, the texture data of the texture areas AT1, AT2, AT3 ... Is two-dimensionally mapped. For example, FIG. 4A
The texture pattern TP1 as shown in FIG. 4 is converted into coordinates on the two-dimensional screen as shown in FIG. 4B. The texture pattern TP1 thus mapped is
As shown in FIG. 8C, it is sent to the drawing area. Then, it is combined on the surface of the object in the drawing area AD1.

For mapping onto polygons, texture patterns T1, T2 and T3 in texture areas AT1, AT2 and AT3 as shown in FIG. Attached to the surface. As a result, as shown in FIG. 5C,
Textures T1, T2, T3 are attached to the surface of the object OB1. This is arranged in the drawing area AD1. The screen of the drawing area AD1 is displayed on the screen.

In the case of a still image texture, the texture pattern in the main memory 3 is transferred to the texture areas AT1 and A in the frame memory 10 via the image synthesizing device 6.
Are transferred to T2, AT3, .... The image composition device 6 attaches this to the polygon. As a result, a still image texture is realized on the object.

In addition, animation textures are possible. That is, in the case of a moving image texture, for example, a CD-ROM
The compressed moving image data from is once read into the main memory 3. Then, this compressed image data is sent to the image decompressor 4. The image decompressor 4 decompresses the image data. Then, this moving image data is transferred to the frame memory 10
It is sent to the upper texture areas AT1, AT2, AT3 .... Since the texture areas AT1, AT2, AT3, ... Are provided in the frame memory 10, the texture pattern itself can be rewritten for each frame. In this way, the texture areas AT1, AT2, AT
When the moving image is sent to 3, the texture is dynamically rewritten and changed every frame, and the texture of the moving image is realized.

The compressed moving image data from the CD-ROM is read into the main memory 3, the compressed image data is decompressed by the image decompressor 4 and sent to the drawing area AD1 on the frame memory 10, and the moving image is directly displayed on the screen. Can be drawn on.

In one embodiment of the present invention, the CD-R
Although the image data is compressed and recorded in the OM, the image data may be compressed and recorded in another recording medium, for example, a semiconductor memory such as a magnetic disk or a memory card.

The image compression method is not limited to DCT, and other compression methods can be used as well.

[0024]

According to the present invention, the moving image information is the CD-R.
Since it is compressed and recorded in the OM, moving image data can be easily handled. A texture area is provided in the frame memory. Therefore, the texture pattern can be rewritten for each frame. in this way,
A dynamic texture can be realized by dynamically rewriting the texture pattern for each frame.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flow chart used to explain an embodiment of the present invention.

FIG. 3 is a schematic diagram used to describe a memory area in an embodiment of the present invention.

FIG. 4 is a schematic diagram used to describe a texture in an embodiment of the present invention.

FIG. 5 is a schematic diagram used for explaining a texture in an embodiment of the present invention.

[Explanation of symbols]

 1 System Bus 2 CPU 3 Main Memory 4 Image Decompressor 5 CD-ROM Decoder

Claims (5)

[Claims] 1. A data reproducing means for reproducing compressed moving picture data recorded on an information recording medium in which moving picture data is compressed and recorded, and compressed moving picture data reproduced from said data reproducing means are received via a bus line. An image processing apparatus comprising image data expansion means for expanding the compressed moving image data, and image composition means for receiving the expanded image data from the image data expansion means via a bus line and synthesizing the image data. 2. An image memory having a drawing area for displaying an object on a screen and a texture area for decorating the object is provided to the image synthesizing means, and the image memory is received via the bus line. The image processing apparatus according to claim 1, wherein the expanded moving image data can be selectively transferred to both the drawing area and the texture area. 3. The image synthesizing apparatus according to claim 1, wherein the data reproducing means reproduces a data recording medium on which information is optically recorded. 4. The image processing apparatus according to claim 1, wherein the data reproducing means reproduces a data recording medium on which information is magnetically recorded. 5. The image processing apparatus according to claim 1, wherein the data reproducing means reproduces an information recording medium including a semiconductor memory.