MATLAB Answers

how to embed a watermark in a color image

조회 수: 26(최근 30일)
shafaq innam
shafaq innam 2013년 4월 14일
답변: cui 2021년 9월 13일
i=imread('golf.jpg'); imshow(i); j=rgb2gray(i); imshow(j); n=imread('copy.jpg'); l=imresize(n,0.5); m=rgb2gray(l); imshow(m); [r,c]=size(j); startrow=1; startcol=1; j(startrow:startrow+size(m,1)-1,startcol:startcol+size(m,2)-1) = m; imshow(j); i used this code for watermarking a grayscale image and i can embed the watermark anywhere by replacing the values but it doesnot work for color images how can i watermark a color image?

답변(2개)

Image Analyst
Image Analyst 2013년 4월 14일
You can do that same thing in every color channel.
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Now put in watermark, then recombine
newRGBImage = cat(3,watermarkedRed, watermarkedGreen, watermarkedBlue);
  댓글 수: 4
Image Analyst
Image Analyst 2019년 7월 26일
But you didn't answer my two questions. And I'd have to research it just like you would, but since it's your project, not mine, and it will probably take more than about 5 minutes, I can't afford to donate that much time to you. Sorry. I'm sure you'd do just as good a job of delving into the intricate details as I could.

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