Patent ID: 7756295
Filing Date: 2010-07-13
Classification: G06K

Abstract:
1. A device for detecting a change region in an inputted image, the device comprising: a first change detector which detects a first change region distribution based on the difference between a spatial change pattern of a pixel value of a learned background image and a spatial change pattern of a pixel value of the inputted image; a second change detector which detects a second change region distribution based on the difference between brightness information of the learned background image and brightness information of the inputted image; a spatial frequency detector which detects information on spatial frequencies in respective regions in the learned background image, a weighting calculator which calculates, for each pixel in the inputted image, a first weight parameter for the first change region distribution and a second weight parameter for the second change region distribution such that the first weight parameter is larger than the second weight parameter in a region where a component having a relatively high spatial frequency is stronger than a criterion based on the information on the spatial frequencies in the respective regions; and an integrating calculator which calculates an integrated change region distribution by integrating the first change region distribution and the second change region distribution based on the first and second weight parameters.