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1 dimensional DCT vs 2 dimensional DCT

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  1. vladant

    2009-02-21 21:36:13 UTC
    Hi,

    As far as I know 1-D transform performs N*N computations, to perfotm 2-D DCT we have to transform (by 1-D DCT) the rows and then the columns. The result is sad: 2*N*N*N computations, fot an 8x8 image we get 2*8*64 = 1024.

    Regards,
    Vladimir
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