Histogram of color image
40 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
I hide message inside image using LSB .It is work but I get a different style of output of histogram.how to solve it?
my code is:
subplot(4, 4, 2);
Red = coverimage(:,:,1);
Green = coverimage(:,:,2);
Blue = coverimage(:,:,3);
%Get histValues for each channel
[yRed, x] = imhist(Red);
[yGreen, x] = imhist(Green);
[yBlue, x] = imhist(Blue);
%Plot them together in one plot
plot(x, yRed, 'Red', x, yGreen, 'Green', x, yBlue, 'Blue');
title('Histogram of Cover image ', 'FontSize', fontSize);
subplot(4, 4, 4);
Red = stegoimage(:,:,1);
Green = stegoimage(:,:,2);
Blue = stegoimage(:,:,3);
[yRed1, x1] = imhist(Red);
[yGreen1, x1] = imhist(Green);
[yBlue1, x1] = imhist(Blue);
plot(x1, yRed1, 'Red', x1, yGreen1, 'Green', x1, yBlue1, 'Blue');
title('Histogram of Stego image ', 'FontSize', fontSize);
0 commentaires
Réponses (3)
muratcan tek
le 27 Mai 2020
I fixed it
coverimage=imread('image.jpg');
Red = coverimage(:,:,1);
Green = coverimage(:,:,2);
Blue = coverimage(:,:,3);
[yRed, x] = imhist(Red);
[yGreen, x] = imhist(Green);
[yBlue, x] = imhist(Blue);
subplot(1, 2, 1);
plot(x, yRed, 'Red', x, yGreen, 'Green', x, yBlue, 'Blue');
title('Histogram of Cover image ', 'FontSize', 1);
subplot(1, 2, 2);
bar(yRed, 'Red') ,hold on , bar(yGreen, 'Green'), hold on ,bar( yBlue, 'Blue');
title('Histogram of Stego image ', 'FontSize', 1);
0 commentaires
muratcan tek
le 27 Mai 2020
this is better
coverimage=imread('image.jpg');
Red = coverimage(:,:,1);
Green = coverimage(:,:,2);
Blue = coverimage(:,:,3);
[yRed, x] = imhist(Red);
[yGreen, x] = imhist(Green);
[yBlue, x] = imhist(Blue);
subplot(1, 2, 1);
plot(x, yRed, 'Red', x, yGreen, 'Green', x, yBlue, 'Blue');
title('Histogram of Cover image ', 'FontSize', 1);
subplot(1, 2, 2);
bar(yRed, 'Red') ,hold on , bar(yGreen, 'Green'), hold on ,bar( yBlue, 'Blue');
title('Histogram of Stego image ', 'FontSize', 1);
0 commentaires
Image Analyst
le 27 Mai 2020
It's because your cover image has a continuous histogram - counts for every gray level - while your stego image does not. The stego image has no counts for some gray levels. It looks like it contains only even or only odd gray levels, probably as an artifact of your encoding process.
0 commentaires
Voir également
Catégories
En savoir plus sur Image Processing Toolbox dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!