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Contour compression is to encode the boundaries of objects and important for object-orient image compression and cartoon-like image compression. In this paper, we propose an advanced algorithm to perform lossy compression for contours. First, we find that among all curves, the 3rd order polynomial is most suitable for contour compression. Second, we suggest that, instead of encoding the coefficients...
Integer transform are the discrete transforms whose entries are summations of 2-k. If for an integer transform, we can perfectly recover the input from the output, we call it the reversible integer transform. In 2001, Hao and Shi developed an algorithm that can convert any reversible non-integer transform into a reversible integer transform. In this paper, we improve their works. First, we simplify...
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