Patent ID: 8665351
Filing Date: 2014-03-04
Classification: G06T,H04N

Abstract:
1. An image processing device, comprising: an obtaining unit obtaining image data; a low-pass processing unit performing a low-pass processing to an image data obtained by the obtaining unit to generate a low-pass image; a calculating unit performing calculation for correction to improve lightness of dark area gradation of the image data by using the low pass image generated by the low-pass processing unit; a correcting unit performing a correction to improve lightness of the dark area gradation of the image data based on a calculation result of the calculating unit; a first image processing unit performing, on the image data obtained by the obtaining unit, image processing including gradation conversion processing according to an input/output characteristic defined by a gradation curve formed only of an exponential component represented by y =x a second image processing unit performing, on the image data, gradation conversion processing according to an input/output characteristic defined by a gradation curve which is different from the gradation curve in the first image processing unit and has an S-shaped characteristic after the correcting unit performed the correction to improve lightness of the dark area gradation of the image data.