Abstract: The object is to increase the efficiency of processing by conferring the residual image function on hardware and to provide an image processing device wherein processing is implemented at higher speed. In an image processing device equipped with an image memory and a control section that writes generated image data to the image memory, there is provided a blend circuit that reads image memory or image data from image memory and attenuates the read image data and that writes this together with newly generated image data into another image memory, thereby producing a residual image effect.

Abstract: A transparency conversion circuit 40 is provided between a matrix conversion circuit 4 and an intensity calculation circuit 5 in a geometry processing unit 20. The transparency conversion circuit 40 is provided with a converter 41 and a parameter register 42. The converter 41 converts the transparency at the vertex that is input by the matrix conversion circuit 4 in correspondence to the Z component of the unit normal vector at the vertex, and the results are output to the intensity calculation circuit 5. The parameter register 42 holds a parameter value that is used for the conversion performed by the converter 41. As a result, the transparency at a polygon can be corrected while taking into consideration the angle formed by the planar surface of the polygon and the direction of the line-of-sight and the environment in which the polygon is placed. Therefore, a method for and an apparatus for transparency conversion whereby a translucent polygon is rendered to produce an impression of solidity are provided.

Abstract: The present invention relates to a image processing apparatus and the method thereof which can change image to be shown on a reflection surface of an object.