IMAGE CORRECTION DEVICE FOR IMAGE PROCESSOR, IMAGE CORRECTION METHOD AND MACHINE READABLE RECORDING MEDIUM RECORDING IMAGE CORRECTION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an image correction device for an image processor, an image correction method and a recording medium recording an image correction program capable of correcting both the contrast and lightness of source images, especially suppressing the emphasis of the contrast for the complesion area of a human body image of the like and correcting the contrast and lightness of the image. SOLUTION: For the correction of the contrast of the source image, the source image is divided into plural rectangular areas (P7), a lightness histogram for indicating frequency distribution for each lightness of pixels for the respective areas is prepared and a lightness conversion curve which is the cumulative value is prepared (P9). Based on the lightness conversion curve, the lightness of the pixels of the divided respective rectangular areas is converted to new lightness (P12). Whether or not it is the complexion area is judged from the most frequent hue value of the area and when it is the complexion area, the clipping level of the lightness histogram is adjusted, the emphasis of the contrast is suppressed and the contrast and lightness of the image are corrected.