[WM]: a question about cox's algorithm

["=?gb2312?B?0dbttQ==?=" <yanmiao06@mails.gucas.ac.cn>]

hi all
	I am new in this field. And I am about to impelment a variance of cox's algorithm.  The image is divided in 8 * 8 block, and
dct transform is applied to each block, then insert watermark into each block. My questions is this:
       1. Dose each pixel in a 8 * 8 block  can only be inserted one bit, which means a block can at most inject 64 bits infomation?
       2. when trasformed using dct, the values are real numbers, but after inject the watermark, I have to round real numbers into
integer, because image gray-level or rgb value is represented by integer. Dose this affect my final result?

best regards





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