dct quantisation on image

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vaishali il 6 Nov 2014

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Risposto: SRI il 6 Nov 2014

Hello

I am writing code for dct image steganography. There I have divided the cover image into 8*8 block. later I subtracted 128 from each pixel value. Then how to apply quantization on each block?

thanks in advance

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SRI il 6 Nov 2014

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Hi Vaishali

Now go through the command blkproc(which is nothing but a block processing) just apply the 8x8 matrix into this block

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