I need to hide a color image into another color image using LSB substitution,The following code hides image into another image.But I have no idea as to how to retrieve it.Please help

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ma da 2017-12-14

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/372878-i-need-to-hide-a-color-image-into-another-color-image-using-lsb-substitution-the-following-code-h

评论： Yogesh Lamture 2019-9-23

Hiding image

cover=imread('D:\Images\falls.jpg');

msg=imread('D:\Images\autumn.jpg');

%Get the R component

cover1=cover(:,:,1);

%set least 3bit zeros

cover1=bitand(cover1,248);

%let secret image bytes shift right by 5 bits

msg1=msg(:,:,1);

shiftmsg3=bitshift(msg1,-5);

%hiding

cover1 =bitor(cover1,shiftmsg3);

%Get the G component

cover2=cover(:,:,2);

%set least 3bit zeros

cover2=bitand(cover2,248);

%let secret image bytes shift right by 5 bits

msg2=msg(:,:,2);

shiftmsg3=bitshift(msg2,-5);

%hiding

cover2=bitor(cover2,shiftmsg3);

%Get the B component

cover3=cover(:,:,3);

%set least 3bit zeros

cover3=bitand(cover3,248);

%let secret image bytes shift right by 5 bits

msg3=msg(:,:,3);

shiftmsg3=bitshift(msg3,-5);

%hiding

cover3=bitor(cover3,shiftmsg3);

%save

stego=cover;

cover(:,:,1)=cover1;

cover(:,:,2)=cover2;

cover(:,:,3)=cover3;

imwrite(cover, 'D:\color\stego.bmp');

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Yogesh Lamture 2019-9-23

Hello,

I am new to MATLAB and also working on the same concept i.e. Image Steganography. I want to hide one color image into another color image. I have seen your code but not able to understand the logic behind this. It will be great if you explain the logic.

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Answer 1

Image Analyst 2017-12-14

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/372878-i-need-to-hide-a-color-image-into-another-color-image-using-lsb-substitution-the-following-code-h#answer_296266

LSB_Watermarking.m

See my attached demo.

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ma da 2017-12-17

LSB_Watermarking.m demo displays the grayscale image but I need the result for color images. Both the cover image,stego image must be color images.No grayscale conversion should be performed.Please help.