Combining Color Images as one
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PenguinForce
el 2 de Oct. de 2016
Editada: Jang geun Choi
el 2 de Oct. de 2016
SO I have three separate green, blue, and red images. I want to display these three separate images as one combined image, while displaying them each individually as well, like in the picture below. However, my code is not working and only returns an error message instead. Could someone help me out? Thanks!
Bimage = zeros(256, 256, 3, 'uint8');
Bimage(:, :, 3) = repmat(255:-1:0, 256, 1);
imagesc(Bimage)
Gimage = zeros(256, 256, 3, 'uint8');
Gimage(:, :, 2) = repmat(0:1:255, 256, 1);
imagesc(Gimage)
Rimage = zeros(256, 256, 3, 'uint8');
Rimage(:, :, 1) = repmat(0:1:255, 256, 1);
R2= imrotate(Rimage,90); %Rotate image by 90 degrees
imagesc(R2)
subplot(2,2,1), mesh(Bimage); title('Blue Image');
subplot(2,2,2), mesh(Gimage); title('Green Image');
subplot(2,2,3), mesh(R2); title('Red Image');
subplot(2,2,4), mesh(Bimage,Gimage,R2); title('Rainbow Image');
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Jang geun Choi
el 2 de Oct. de 2016
Bimage = zeros(256, 256, 1, 'uint8');
Bimage(:, :, 3) = repmat(255:-1:0, 256, 1);
Bimage=Bimage(:,:,3);
imagesc(Bimage)
Gimage = zeros(256, 256, 1, 'uint8');
Gimage(:, :, 2) = repmat(0:1:255, 256, 1);
Gimage=Gimage(:,:,2);
imagesc(Gimage)
Rimage = zeros(256, 256, 1, 'uint8');
Rimage(:, :, 1) = repmat(0:1:255, 256, 1);
R2=imrotate(Rimage,90); %Rotate image by 90 degrees
R2=R2(:,:,1);
imagesc(R2)
subplot(2,2,1), imshow(Bimage); title('Blue Image');
subplot(2,2,2), imshow(Gimage); title('Green Image');
subplot(2,2,3), imshow(R2); title('Red Image');
subplot(2,2,4), imshow(cat(3,Bimage,Gimage,R2)); title('Rainbow Image');
5 comentarios
Jang geun Choi
el 2 de Oct. de 2016
To express amount of base color, two dimensional matrix is enough. In your code,
Bimage(:, :, 3) = repmat(255:-1:0, 256, 1);
This is used to express lack of blue as dark color.
And, cat function is used to merge matrix. Color image is considered as 3 dimensional matrix, image(x,y,c), in matlab. x and y are spatial coordinate, c is each base color.
image_data=cat(3,R2,Gimage,Bimage);
imshow(image_data)
Like this, we can stack base color matrix using cat function.
Sorry, my english is not good.
Jang geun Choi
el 2 de Oct. de 2016
Editada: Jang geun Choi
el 2 de Oct. de 2016
Yes, you can. You already use rotation in red color matrix using function "imrotate"
Gimage = zeros(256, 256, 1, 'uint8');
Gimage(:, :, 2) = repmat(0:1:255, 256, 1);
Gimage=Gimage(:,:,2);
Gimage=imrotate(Gimage,-90);
imagesc(Gimage)
Change code like this.
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Image Analyst
el 2 de Oct. de 2016
Try this:
workspace; % Make sure the workspace panel is showing.
format long g;
format compact;
fontSize = 20;
greenImage = uint8(repmat(0:255, 256, 1));
redImage = imrotate(greenImage, 90);
blueImage = imrotate(greenImage, 180);
subplot(2, 2, 1);
imshow(redImage);
title('Red Image', 'FontSize', fontSize);
subplot(2, 2, 2);
imshow(greenImage);
title('Green Image', 'FontSize', fontSize);
subplot(2, 2, 3);
imshow(blueImage);
title('Blue Image', 'FontSize', fontSize);
% Recombine separate color channels into a single, true color RGB image.
rgbImage = cat(3, redImage, greenImage, blueImage);
subplot(2, 2, 4);
imshow(rgbImage);
title('Color Image', 'FontSize', fontSize);
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