| 摘要 |
For obtaining motion information by using a convention motion estimator, a composite signal obtained from both the luminance signal and the chrominance signal is applied to this motion estimator. Based on the signals (Cb, Cr) of the two chrominance components (U, V), the contour of the colored elements of the image is extracted by means of Sobel filters (9, 10), i.e. high-pass two dimensional filters generating colour contours, and the output signals of these filter are added to the Iuminance signal (2) in an adder (14), the resultant signal (3) being applied to the motion estimator. The method ensures the detection of motion even when luminance is constant across an image without the need for separate luminance and chrominance motion detectors. <IMAGE> |
