How return my image from binary to grayscale
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I hide my image "mouse" in image " pigs". Firstly I convert the image "mouse" to binary in encryption code .secondly I return it from decryption code .Now I want to return it to gray-scale. how can help please.
encryption code
main = imread('mouse.tif');
cover = imread('pigs.tif');
main2= im2bw(main);
bitNo = 1;
steg = zeros(size(cover), 'uint8');
for i = 1:size(cover,1)
for j = 1:size(cover,2)
coverTmp = dec2bin(cover(i,j), 8);
msgTmp = dec2bin(main2(i,j));
coverTmp(9-bitNo) = msgTmp;
steg(i,j) = bin2dec(coverTmp);
end
end
imwrite(steg,'S1.tif');
decryption code
stego = imread('S1.tif');
steg1 = zeros(size(stego));
for i = 1:size(stego,1)
for j = 1:size(stego,2)
mTmp = dec2bin(stego(i,j), 8);
msTmp = mTmp(9-bitNo);
steg1(i,j) = bin2dec (msTmp);
end
end
grayImage = 255*uint8(steg1);
figure, imshow(grayImage);
2 Comments
Image Analyst
on 29 Dec 2016
You forgot to attach s1.tif, mouse.tif, and pigs.tif. If you want an bitplane watermarking demo, see my attached demo.
Answers (1)
John D'Errico
on 29 Dec 2016
Edited: John D'Errico
on 29 Dec 2016
If your image is at the end in binary form, so 0-1 only, then nothing can convert it back into a full grayscale, with additional information per pixel. You have thrown that information away. That information is lost forever. If you wanted to retain more information, then you needed to do a better job of storing the additional information before you lost it.
1 Comment
snehal gaikwad
on 3 Oct 2020
if we have rescaled the binary image which gives area of interest from grayscale image then how we can convert binary image back to that input garyscaled image of same size (size of resized binary image)
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