Patent ID: 7489830
Filing Date: 2009-02-10
Classification: H04N

Abstract:
1. An image rendering system comprising: a scanner that scans an image and produces image data and high resolution binary data; an encoder that is coupled to the scanner and encodes the image data to provide encoded image data including anti-aliased grayscale text or lineart data that includes an identification of boundary pixels and associated pixel values, wherein the encoder separates the boundary pixels into interior boundary pixels and exterior boundary pixels; and a decoder that is coupled to the encoder and decodes the encoded image data to provide decompressed data including anti-aliased text or lineart data and renders the decompressed data, wherein the decoder stores default global grayscale values including first and second default global grayscale values and sets the interior boundary pixels to the first default global grayscale value and sets the exterior boundary pixels to the second global default grayscale value.