Patent ID: 6252993
Filing Date: 2001-06-26
Classification: G06T

Abstract:
A video signal coding method for detecting feature points of an input video signal and for coding coordinates of the feature points, comprising the steps of:detecting feature points of said input video signal by a canny edge detecting method;generating chain coded data by chain coding coordinates of said detected feature points;detecting an edge of said input video signal by extracting high frequency components of said input signal and determining whether an edge intensity of said edge is at least a specified value;generating region length coded data by coding a length of a region including said feature points, of which edge intensity is at least said specified value in an edge intensity maximum change direction at coordinates of said detected feature points; andmultiplexing the chain coded data and the region length coded data,wherein:at said step of coding a length of a region, a mean value of the length of the region is obtained, and then the mean value is coded; andat said step of multiplexing, said chain coded data and said region length coded data for said mean value are multiplexed.