Patent ID: 6496198
Filing Date: 2002-12-17
Classification: G06T

Abstract:
A method for rendering a color image using a binarized image representing the color image and a hierarchical tree structure representing the color image, the hierarchical tree structure including nodes representing respective blocks of image data within the color image, the nodes containing color information for respective blocks, the method comprising:defining, in a memory, a color image rendering area corresponding to a block of image data in the color image; obtaining foreground color information from a node corresponding to the block of image data; detecting black pixel locations in the binarized image within an area of the binarized image corresponding to the block of image data; assigning the foreground color to pixels at locations in the color image rendering area corresponding to the detected black pixel locations; obtaining background color information from the node corresponding to the block of image data; and assigning the background color to pixels at each location in the color image rendering area which does not correspond to the detected black pixel locations.