IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an apparatus which applies a blue noise method to a multi-gradation input image to generate a halftone image. ! SOLUTION: An image processing apparatus comprises: coordinate generation means for generating the coordinates of a pixel of interest; address generation means for generating an address on the basis of the generated coordinates and arrangement information indicating the arrangement of multiple second threshold value matrices which constructs a first threshold value matrix; matrix holding means for holding and referencing one reference threshold value matrix of the multiple second threshold value matrices to output a threshold value according to the address; and comparison means for comparing the multi-gradation color signal of the pixel of interest and the output threshold value to output an image signal of a halftone image. In the arrangement information are arranged the multiple second threshold value matrices composed of the reference threshold value matrix and