| abstract |
(57) [Summary] [Problem] Conventionally, corrections that do not take skin color into consideration are not performed, and in the case of weak backlight, even if a person's face is slightly dark, correction has not been performed so much, and even stronger. In the case of backlight, it is not known how bright the face is, even if the face is determined to be backlight. SOLUTION: Under-exposure under-exposure, over-exposure over-exposure processing or linear pre-processing is performed based on a luminance histogram feature amount and various curve data (steps 103 to 107). Other than overexposure, When the second feature value is a positive value in both the highest region and the lowest region of the input luminance level, it is determined that the backlight is strong backlight and the backlight flag is set to 1 (steps 108 to 11). 4). Then, after performing a face part recognition process for recognizing a face area of the input image, a gradation curve correction level correction process is performed (steps 110 and 116). In the gradation curve correction level correction processing, in the case of backlight, correction is performed at the level center obtained by skin color recognition. |