Patent ID: 6018595
Filing Date: 2000-01-25
Classification: G06T

Abstract:
An apparatus for decoding an object contour from a bitstream of contour information encoded using a chain code, the contour decoding apparatus comprising:a demultiplexing means for separating the bitstream of the contour information into start contour pixel information and chain code information;a start contour pixel decoder for decoding the start contour pixel information separated by the demultiplexing means and outputting horizontal and vertical coordinate values of the start pixel; anda chain code decoding means for storing horizontal and vertical coordinate values of a previous contour pixel, selecting an incremental/decremental value as indicated by the chain code information output from the demultiplexing means, calculating coordinate values of a next contour pixel using said selected incremental and decremental values and said stored coordinate values, and outputting horizontal and vertical coordinates at which a contour pixel is located.