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[WM]: wavelet based watermarked
dear watermarkers
I'm working on a wavelet based watermarked...I'm really new in this field and I have lot to ask...
I try a simple wavelet based watermarked just decomposed the image and change the details coeffecients of the lowest level by adding
it with 1 or -1 (randomly) after that inverse DWT, the problem is...the watermarked image is not perceptual invisibility...can
antone tell me why and how to fix this. I follow the step from some papers but the result is not the same. Am I miss some step? Ok
thanks. please don't laugh,,I really new in these field,,,ok you can laugh but please answer my question.
regards
Bo
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