Patent ID: 6882444
Filing Date: 2005-04-19
Classification: G06T

Abstract:
1. An image drawing apparatus for complementing an aliasing with an intermediate color, said image drawing apparatus comprising: a calculating unit for calculating a slope of a side of a polygon; a specifying unit for specifying a pixel string of the aliasing to be complemented, based on a difference between pixel positions of pixels forming a part of the polygon and pixel positions of pixels which have been stored previously in an image memory, at the time of storing image information of the pixels forming a part of the polygon in the image memory; a first semi-transparent rate calculating unit for calculating a semi-transparent rate of each pixel forming the pixel string, based on the number of pixels of the pixel string specified by the specifying unit; a second semi-transparent rate calculating unit for performing a predetermined calculation for a value of a decimal fraction part of a column-direction or a row-direction calculated from the calculated slope to generate a second semi-transparent rate of a pixel; and a processing unit for carrying out a semi-transparent processing of each pixel to be complemented, based on the semi-transparent rate or the second semi-transparent rate.