| 摘要 |
<p>A method for encoding a video signal of a contour of an object, which is capable of reducing the amount of transmission data through selectively transforming the approximation errors, is disclosed. The method divides the contour into a multiplicity of contour segments, and approximates each of the contour segments by a line segment, thereby determining positions of vertices on the contour. Then, it calculates a set of errors between the contour segment and the line segment, wherein the set of errors is a difference between each contour segment and the line segment corresponding thereto, and then calculates a value for determining the difference between the contour segment and the line segment. Thereafter, the method encodes and generates the positions of the vertices on the contour and the set of errors if the calculated value for determining the difference between the contour segment and the line segment is larger than a threshold value TH. Alternatively, if the calculated value is smaller than the threshold value TH, the method encodes and generates only the positions of the vertices on the contour, thereby reducing the amount of transmission data. <IMAGE></p> |
