Patent ID: 7570836
Filing Date: 2009-08-04
Classification: G06T

Abstract:
1. An image processing device that makes a judgment on whether a shot image is a backlit image, based on image data that is comprised of plural pixels, the device comprising: an acquiring module that acquires the image data; an analysis module that partitions the plural pixels constituting the acquired image data into inner region pixels corresponding to the central region of the shot image and outer region pixels corresponding to the non-central region of the shot image, and thereby analyzes the respective groups of pixels; an inner luminance distribution characteristic acquiring module that acquires an inner luminance distribution characteristic by using the result of the analysis, the inner luminance distribution characteristic being a luminance distribution characteristic regarding the inner region pixels; an outer luminance distribution characteristic acquiring module that acquires an outer luminance distribution characteristic by using the result of the analysis, the outer luminance distribution characteristic being a luminance distribution characteristic regarding the outer region pixels; an inner similarity calculation module that calculates an inner similarity by using the acquired inner luminance distribution characteristic, the inner similarity indicating a degree of similarity between the central region of a backlit image and the central region of the shot image; an outer similarity calculation module that calculates an outer similarity by using the acquired outer luminance distribution characteristic, the outer similarity indicating a degree of similarity between the non-central region of the backlit image and the non-central region of the shot image; and a judgment module that makes a judgment on whether the shot image is a backlit image by using the calculated inner similarity and outer similarity.