Basic HTML version of Foils prepared 23 February 97

Foil 11 Compression (11): Motion Estimation in Real Space - Block Matching

From Theory and Practice of Wavelet compression Rome Lab Quarterly Review for CIV -- June 28 96. by Czeslaw Jedrzejek, Tomasz Major *
1 An image is divided into fixed size blocks.
2 The basic assumption is that all the pixels in a block have the same displacement.
3 For each block in frame t, a search is done to try to find its equivalent in frame t-1 and to find the displacement vector of this block.
4 The scheme works for any key frame compression method.
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