recovered the color watermark

can anyone please help me for recovered image watermark by using ( LSB ) if I hide gray image inside color image ( I want recovered the color watermark )

[Walter Roberson]

If you hide a gray image inside a color image, then where is the color watermark? Or do you mean that the watermark is encoded over all three color planes of the color image? If so then the method of retrieving it is going to depend upon how it is encoded, which you have not specified.

[ghassan78]

i want a simple method for color watermark ... thank you very much

Answer 1

[Image Analyst]

Here's a grayscale example (attached). Hopefully you can adapt it. Good luck.

[ghassan78]

thank you very much (Image Analyst) for your example , but this grayscale ... i am sorry i want recovered color watermark

[Walter Roberson]

Hide the image in one of the bitplanes of the colored image.

[Image Analyst]

That's what I thought he could do. Hide the red channel of the color watermark in some bitplane of the red channel of the colored image, the green channel in the green channel, and the blue channel in the blue channel. I have not heard why he could not make this adaptation.

[Walter Roberson]

His question would seem to indicate that he has a grayscale secret that he wants to put into a color image. The easiest way to do that is to embed in one of the planes.

[Image Analyst]

Right, there does seem to be a discrepancy between his original question where he said "hide gray image", and his comment to that where he said "color watermark", and his comment to me above where he said "i want recovered color watermark". He should use precise wording like I want a hidden (or visible/not-hidden) color (or grayscale) watermark in a color image so the desired situation is known precisely. Plus, I gave probably the "dumbest" of the algorithms, other than simple averaging. I don't know the more modern and sophisticated methods that are in use now.

[ghassan78]

thank you very much for your comments ......

[Image Analyst]

If my code helped you, then you can mark it as "Accepted". Thanks in advance.