Patent ID: 6683677
Filing Date: 2004-01-27
Classification: G06T

Abstract:
An apparatus for calculating an optical flow and a camera motion of a camera using correlation matching and a system model in moving images, the apparatus comprising:feature point extracting means for extracting a feature point from each of a previous image and a current image in a sequence of input images; optical flow calculating means for calculating an optical flow by determining a maximum edge connecting strength between the feature points extracted by the feature point extracting means; first camera motion calculating means for calculating a camera motion using the optical flow calculated by the optical flow calculating means; second camera motion calculating means for eliminating an incorrect optical flow from the optical flow calculated by the optical flow calculating means and calculating a second camera motion; optical flow location estimating means for estimating a location of the optical flow by estimating a distance difference between an estimated feature point location and a current feature point location in the previous image according to the second camera motion calculated by the second camera motion calculating means; and weighted value calculating means for calculating a plurality of weighted values according to the second camera motion calculated by the second camera motion calculating means and providing the weighted value to the optical flow calculating means, said weighted values changing according to zoom and optical axis rotation of said camera and including weighted values of correlation matching, location error matching and edge strength matching.