Patent ID: 8368959

Claim:
An image processing system, comprising: an image type classification circuit to identify inputted image data as picture image data or text/graphics image data; a halftone circuit, operatively connected to said image type classification circuit, to convert the inputted image data, identified as picture image data, to halftone image data; a tile pattern circuit, operatively connected to said image type classification circuit, to replace the inputted image data, identified as text/graphics image data, with tile patterns; an encoding circuit, operatively connected to said tile pattern circuit, to encode non-halftone cluster areas in the tile patterns with a predetermined pattern; a bitmap rendering circuit, operatively connected to said encoding circuit and said halftone circuit, to combine the halftone image data from said halftone circuit with the encoded tile patterns from said encoder circuit to render a bitmap; and a buffer to store said bitmap; said encoding circuit encoding only non-adjacent pixels of the non-halftone cluster areas in the tile patterns with a predetermined pattern, an adjacent pixel being a pixel immediately adjacent to a pixel of a halftone cluster.