The first step in image watermarking using DCT is to divide the image into 8 x 8. My question is do I have to divide the image as a whole or divide them by RGB channels so that for each channel I will divide them by 8x8.
Any comments will be appreciated.Thanks
Just a follow up am I supposed to the divide the host image only by 8 x 8 or both the host image and the cover image?
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