Optical flow as camera motion calculation unit using a correlation match the system model in the video, that allows to calculate the optical flow by using a correlation match the system model, even if it real time, and the image rotation, zoom phenomenon to calculate the optical flow from the video generation , the characteristic point extraction means for extracting a feature point of the input image is continuous (previous image and current image); Optical flow calculation means for calculating an optical flow by using the feature points extracted from a specific point extracting means; A first camera motion calculation means by using the optical flow calculated by the optical flow calculation means for calculating the movement of the camera; After removal of the wrong optical flow of the calculated optical flow in the optical flow calculating unit, a second camera motion calculation means for re-calculating the motion information of the camera; A second optical flow position estimation means in accordance with the camera, the camera motion calculation unit calculating motion estimates a characteristic point distance difference and the estimated position information of the current position of the feature point in the previous image to the optical flow calculation means provided; The second, the camera moves according to the movement of the camera calculated in the calculation means sets the correlation matching, matching the position error, the weight of the edge intensity matching is provided by the weight calculation means includes weight calculation sudanreul provided with optical flow calculation means.
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