IMAGE PROCESSING APPARATUS, IMAGE PROCESSING METHOD, PHOTOGRAPHIC IMAGING APPARATUS, AND RECORDING DEVICE RECORDING IMAGE PROCESSING PROGRAM

摘要

An image processing apparatus includes: a gray-scale conversion characteristic deriving unit that sets a reference image out of a plurality of input images obtained by shooting an identical object with a different amount of exposure and derives a gray-scale conversion characteristic from the reference image; a normalizing unit that generates a correction image by correcting brightness of the reference image based on an amount of exposure of the reference image and an amount of exposure of a non-reference image other than the reference image; a position alignment processing unit that computes a positional deviation between the correction image and the non-reference image and generates a position alignment image by aligning a position of the non-reference image with the reference image based on the positional deviation; and an image synthesis processing unit that derives a new pixel value for each pixel using a pixel value of a single or a plurality of images selected out of a plurality of the input images based on the gray-scale conversion characteristic to generate a synthesized image.