Patent ID: 8896729
Filing Date: 2014-11-25
Classification: H04N

Abstract:
1. An image processing apparatus comprising: an input unit for inputting an image captured by an image sensor; a shading correction amount calculation unit for calculating per pixel a shading correction amount to be applied to the image inputted from the input unit; a gamma (γ) correction gain calculation unit for calculating a γ correction gain depending on the shading correction amount and pixel values of the image sensor pixels; and a gain correction unit for applying gain correction to the pixel values based on the γ correction gain; wherein shading correction and γ correction are performed simultaneously by the gain correction with the gain correction unit; wherein the input unit inputs a first input image captured with a short exposure time and a second input image captured with a longer exposure time than the first input image, the image processing apparatus further comprising: a brightness calculation circuit for calculating a brightness by region on-image based on the first input image and the shading correction amount; a first memory unit for storing the result of γ-correcting the first input image; a second memory unit for storing the brightness by region; and a composition unit for merging the image stored in the first memory unit and the γ correction result from the second input image based on the brightness information stored in the second memory unit.