Patent ID: 6668017
Filing Date: 2003-12-23
Classification: G06T,H04N

Abstract:
An additional data detection system comprising:an analyzer which receives and analyzes compressed-image data, extracts and outputs image data of a predetermined image, and also outputs image ID (identification) information regarding the analyzed image data; a degree-of-coincidence determinator which determines a degree of coincidence of the image data output by said analyzer and image data of an image including pre-set additional data, and outputs a signal representing presence of additional data when the determined degree of coincidence is equal to or greater than a predetermined reference value; and a setting unit which receives the degree of coincidence output by said degree-of-coincidence determinator and the image ID information output by said analyzer, obtains a correlation between the image ID information and the degree of coincidence, specifies image ID information of an image which is estimated to have a predetermined degree of coincidence, and operates said degree-of-coincidence determinator to determine a degree of coincidence of image data at a timing the specified image ID information is output from said analyzer.