Patent ID: 8836850
Filing Date: 2014-09-16
Classification: H04N

Abstract:
1. An image composition apparatus comprising: an image pickup unit configured to take an optical image of a subject; an exposure-level-difference setting unit configured to set different exposures when the images are taken; a small region measuring unit configured to divide each of the images taken by said image pickup unit with the exposures set by said exposure-level-difference setting unit into small regions, and to find a measured value based on brightness values in each of the small regions; a small region comparing unit configured to calculate a comparison value for each of the small regions based on the measured value of a small region of one image and the measurement value of the same small region of another image; a representative value calculation unit configured to calculate a representative value based on the comparison values calculated for the respective small regions; a level setting unit configured to set a level-matching gain used for compositing the image data of the images based on an exposure level difference set by said exposure-level-difference setting unit and the representative value calculated by said representative value calculation unit; and a composition unit configured to composite the image data of the images of which the image levels are adjusted by multiplying the gain set by said level setting unit.