Patent ID: 8368779
Filing Date: 2013-02-05
Classification: G06T,H04N

Abstract:
1. An image processing apparatus comprising: a gradation correction unit configured to perform gradation correction upon a subject image to be processed to generate a corrected image, the gradation correction comprising processing for lowering contrast in the subject image; a gradation information acquisition unit configured to acquire gradation information indicating relative balance of brightness in each portion of the subject image; and an adjustment unit configured to adjust a brightness of the corrected image on a pixel basis based on the gradation information; wherein the gradation information acquisition unit comprises an information image generation unit configured to generate information image data comprising luminance information reflecting a high-frequency component contained in the subject image, and wherein the gradation information acquisition unit is configured to acquire the information image data as the gradation information; wherein the information image generation unit comprises a global luminance image generation unit configured to perform filter processing to generate global luminance image data forming a global luminance image indicating a global condition of brightness in the subject image; and wherein the information image generation unit is configured to generate the information image data by performing processing comprising subtraction processing in which a luminance value of each pixel in the global luminance image data is subtracted from a luminance value of a corresponding pixel in the subject image.