IMAGE PROCESSING APPARATUS, IMAGE DISPLAY DEVICE, IMAGE PICKUP DEVICE AND IMAGE PRINTER, GRADATION CONVERSION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide an image processing apparatus capable of improving visibility of a dark area and improving contrast feeling, an image display device, an image pickup device, and an image printer.SOLUTION: An image processing apparatus includes: a first illumination light distribution calculation unit that calculates an illumination light distribution from an input image; a first gradation conversion unit that performs gradation conversion using the illumination light distribution calculated by the first illumination light distribution calculation unit; a second illumination light distribution calculation unit that calculates an illumination light distribution of the image subjected to the gradation conversion by the first gradation conversion unit; and a second gradation conversion unit that performs gradation conversion using the illumination light distribution calculated by the second illumination light distribution calculation unit. The image processing apparatus makes a reference pixel area of the first illumination light distribution calculation unit larger than a reference pixel area of the second illumination light distribution calculation unit.