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question for digital watermark ?

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ghassan78
ghassan78 2014-1-27
关闭： MATLAB Answer Bot 2021-8-20
if we are used this code for recover watermark .... the result is ok with gray watermark ... but way not ok with color watermar? pls help me... and thank you for all...
%determined the size of watermarked image
mw=size(image1,1); %heigth of the watermarked image
nw=size(image1,2); %width of the watermarked image
for ii = 1: mw
for jj = 1 : nw
watermark (ii,jj) = bitget(image1(ii,jj),1);
end
end
figure(2)
imshow(watermark);
title('extracted image'); % watermark image for watermarking

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回答（1 个）

Walter Roberson
Walter Roberson 2014-1-27
Replace the code with
watermark = bitget(image1, 1);
figure(2);
imshow(watermark);
title('extracted image');
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ghassan78
ghassan78 2014-1-29
thank you (Walter Roberson): but my question for color watermark : I mean , if I hide gray scale image inside color image then the result : color watermark : I want extracted this watermark ....... this code is ok with gray watermark but it doesn't work with color watermark , thankful

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