what is the optimal block size while dealing with gray scale images?

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Raman 2013-2-13

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采纳的回答： Walter Roberson

i need to know the optimal block size

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Walter Roberson 2013-2-13

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It depends on the details of the hardware caches in your processor, and on the datatype of your data, and upon how your processing function manipulates the data. If your blocksize is too small then you make too many function calls, but as it gets larger the mathematics of the calculation might get more complex.