Patent ID: 8335251
Filing Date: 2012-12-18
Classification: G06F,G06K,G06T,H04N

Abstract:
1. A video signature extraction device, comprising: an each-picture feature extraction unit that extracts a feature as an each-picture visual feature from each picture which is a frame or a field of an input video, the extracting the each-picture feature includes extracting features of a plurality of dimensions from a region corresponding to each of dimensions of a feature based on the video; a matching weight information extraction unit that analyzes, with respect to each of pictures of the video, an image change in a time direction in the region corresponding to each of the dimensions of the feature, and outputs matching weight information which is information describing a weight corresponding to a degree of the image change; a time axial direction change region extraction unit that analyzes an image change in a time direction with respect to a plurality of regions in the picture, obtains a region, among the plurality of regions, having a large image change, and generates change region information which is information designating the region; an each-region feature extraction unit that extracts a feature as an each-region visual feature from the region corresponding to the change region information; and a multiplexing unit that generates a video signature which has the each-picture visual feature, the matching weight information, the each-region visual feature, and the change region information.