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Showing 1 to 1 of 1 for “"QDCT"”.
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The contour tree image encoding technique and file format
… a complementary lossy compression system to the QDCT (Quantised Discrete Cosine Transform). The artifacts introduced by the two methods are very different; QDCT produces a general blurring and adds extra highlights in the form of overshoots, whereas contour merging sharpens edges, reduces …