Patent ID: 6271848
Filing Date: 2001-08-07
Classification: G06T

Abstract:
An image processing device for generating image data by conducting rendering for a plurality of polygons, said image processing device comprising:a polygon data generating section for generating polygon data containing, at the least, two-dimensional co-ordinates in a display screen, a Z value (depth value) indicating a depth in the display screen, and attribute data indicating the type of polygon, for polygons positioned in a display screen, said attribute data including a semi-transparent polygon, an opaque polygon, a polygon containing transparency portion, and a polygon not containing transparency portion;a polygon buffer memory for storing said polygon data, said polygon data to be stored separately according to said attribute data; anda rendering section, which is supplied with said polygon data in a prescribed order of priority of said attribute data and generates said image data for pixels in said polygons from said polygon data,wherein said prescribe order is set such that the generation of the image data for pixels in the polygons is carried out for the semi-transparent polygon after the opaque polygon, and is carried out for the polygon containing transparency portion after the polygon not containing transparency portion.