GAMMA COMPENSATING METHOD AND APPARATUS, AND DIGITAL PHOTOGRAPHING APPARATUS USING THEREOF

摘要

A gamma compensation method of the present invention comprises the steps of: calculating a first image quality evaluation criterion, which is defined by a number descriptor, for each gamma value by sequentially applying a first to nth gamma value in an original image; calculating a second image quality evaluation criterion, which is defined by the number descriptor, with respect to the original image; evaluating the quality of the original image based on the second image quality evaluation criterion and determining a compensation direction of the original image; drawing a gamma value corresponding to the compensation direction of the original image based on the first image quality evaluation criterion; and carrying out gamma compensation on the original image based on the extracted gamma value. In addition, a gamma compensation apparatus and a digital photographing apparatus of the present invention are configured to perform the processing steps.