| Haar
wavelets |
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| n | An
alternative basis to express the picture |
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| block
would be Haar wavelets |
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| n | [1,1,1,1],
[1,1,-1,-1], [1,-1,0,0], [0,0,1,-1] |
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| By
multiplying the patch by these vectors we obtain |
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| a set of 4
coefficients giving the extent to which |
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| each
of these wavelets approximate the image patch |
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