Patent ID: 6191793
Filing Date: 2001-02-20
Classification: G06T

Abstract:
In a computer image generation system for generating an image of an object by controlling the value of pixels forming the image of the object, the value for each pixel being derived from stored data including texture data for applying texture to the object, the texture data being stored in a sequence of texture maps consisting of a plurality of levels of detail (LODs) versions of the texture data, a method of transitioning between LODs for applying the texture to the object, the method comprising:computing a texture LOD value for each pixel representing the image of the object;providing a dithering offset value for and an LOD bias value each pixel;for each pixel, combining the dithering offset value, the LOD bias value, and the computed LOD value for the pixel to obtain a dithered pixel LOD value for each said pixel; andoutputting the dithered pixel LOD value for each pixel for selecting an associated texture LOD map.