Color Halftoning Method and Circuit for Printer Model in Uniform Color Space

摘要

The present invention relates to a color halftoning method and circuit for a printer model in a uniform color space, the color output device for outputting a color signal having a natural color through a image input device in a limited color, the standard color coordinates A color converting unit for converting an input color signal into a standard color coordinate matching a human visual characteristic, and an adder for forming a target color by adding up a sum of an input color signal output from the color converting unit and an error propagated from neighboring pixels And a color matching unit for matching a target color output from the adder with a limited color, a model for dot of the target color output from the color matching unit, and a database for combining color values of respective partial regions. In order to quantify the error caused by the overlap between the printer dot modeling unit and the printer dot, Consists of a group and the output color and a subtracter for obtaining the difference between the error of the printer output color dot model portion, the error filter for dispersing a pixel neighboring the quantification error output from the subtracter of. Therefore, there is an advantage in that the quality of color printed images can be realized by accurately evaluating and correcting color distortion errors occurring during printing in an equal color space consistent with human visual characteristics.