Patent ID: 7469061
Filing Date: 2008-12-23
Classification: G06K,H04N

Abstract:
1. A method of photo/text separation of a document image, comprising the steps of: converting the document image into a plurality of source color planes; setting a source color consecutive point threshold (Tc), performing an intensity operation for each of the source color planes, including (1) dividing each of the source color planes into a plurality of pixel sections, each section being a square window of pixels; (2) performing an intensity falling point operation for the pixels in each of the pixel sections, (3) setting a state value for each of the pixels in each of the pixel sections, according to the set source color consecutive point threshold (Tc), and (4) accumulating the state values of the pixels in each of the pixel sections; and assigning photo/text types to the document image according to a connected length density threshold (Td) and a result of the intensity operation.