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I need help in image steganography

reem-akk
in Computer Science

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Why some people say that Lsb Matching requiring the original cover although it will be removed the fist lsb and reside removed bits from every byte to form secret message, my opinion we dont need it because we shall take every byte sequentially and drag fist bit regardless of if we add or subtract one to pixel value and we dont care of get back the cover as it was ????,

The second question:

what is the meaning between Data distributed uniformly or randomely when we are applying steganography method?

what is Luminance that its formula:

Luminance L = (0.299 x Red) + (0.587 x Green) + (0.114 x Blue

what is relation to pixel properties?

 

 

please if you can't help me tell me about specialized persons in data hiding to deal with it please

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