Patent ID: 6738159
Filing Date: 2004-05-18
Classification: H04N

Abstract:
An apparatus useful for processing a digital image comprised of picture elements, the image having present therein at least one edge defined by a transition from a first color to a second color, the apparatus comprising:a frame buffer operative to store a plurality of the picture elements, the picture elements each being encoded to indicate whether the edge is present in the each picture element; a table having stored therein data on a plurality of colors, the table being configured such that pairs of the plurality of colors are each associated with a trapping color and the table being selectively addressable based on the encoded picture elements; a bitmap generator operative to selectively generate bit maps based on the encoded picture elements; a processor operative to determine whether a selected picture element has the edge present therein based on the encoding, determine the colors present in the selected picture element based on the encoding and the pairs of colors stored in the table, determine whether a trapping operation should be performed based on the colors determined to be present in the picture element and the pairs stored in the table, determine which trapping color should be used for the trapping operation based on the pairs of colors stored in the table and the trapping color associated with the each pair of colors stored in the table, and perform the trapping operation based on the trapping color and a one of the generated bit maps.