Patent ID: 7460272
Filing Date: 2008-12-02
Classification: H04N

Abstract:
1. An image processing apparatus for performing one of color correction and density correction with respect to binary image data with using the binary image data and contone image data, which are based on an original image, to obtain output binary data, the image processing apparatus comprising: a correction data generation section that performs the one of the color correction and the density correction with respect to the contone image data to generate correction data that is used to correct the binary image data; a binarization section that binarizes one of (a) the correction data generated by the correction data generation section and (b) the contone image data that has been subjected to the one of the color correction and the density correction, to generate corrected binary data; an edge pixel setting section that sets a pixel, in the binary image data, assumed to be an edge as an edge pixel; and a selection section that selects, for the pixel set by the edge pixel setting section as the edge pixel, the corrected binary data generated by the binarization section as the output binary data and selects, for a pixel not being set by the edge pixel setting section as the edge pixel, the binary image data as the output binary data, wherein: the edge pixel setting section detects presence of the edge from the binary image data; when the correction data generated by the correction data generation section increases a pixel value of the contone image data, the edge pixel setting section sets a pixel located in one of regions sandwiching the edge therebetween as the edge pixel; and when the correction data generated by the correction data generation section lessens the pixel value of the contone image data, the edge pixel setting section sets a pixel located in the other of the regions sandwiching the edge therebetween as the edge pixel.