Patent ID: 7826093
Filing Date: 2010-11-02
Classification: H04N

Abstract:
1. A method for scan-to-print color rendering in a system including a scanner engine and a print engine, comprising: storing an index table of respective scanned values in a scanner color space corresponding to each output color of a set of output colors printed by the print engine; storing a color palette index table of values defining how the print engine prints each said output color of said set of output colors in a print engine color space; scanning a color target using a scanner system to provide digital image data comprising image-scan pixels in said scanner color space; for each image-scan pixel in said scanner color space, selecting from said index table the closest scanned value for a corresponding output color; using the selected closest scanned value to select a print engine color space value from the color palette index table and send the selected value from the color palette index table to the print engine; determining a color difference between the image-scan pixel and said closest value as an error for said image-scan pixel; applying color error diffusion to compensate for said color difference by distributing said error to neighbor pixels; printing an output image pixel or pixels using said corresponding output color as adjusted by said color error diffusion.