combining RGB to get a full image
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image_RGB = cat(2,final_red,final_green,final_blue)
imshow(image_RGB);
can anyone suggest me that this code is correct for combining RGB components for getting full image
as soon as possible
0 Comments
Accepted Answer
Image Analyst
on 23 Oct 2011
IMPORTANT NOTE: MATLAB is case sensitive. redchannel is different than redChannel.
It looks like you've taken code I've posted many times and tried to adapt it:
% Extract the individual red, green, and blue color channels.
redChannel = rgbImage(:, :, 1);
greenChannel = rgbImage(:, :, 2);
blueChannel = rgbImage(:, :, 3);
% Recombine separate color channels into an RGB image.
rgbImage = cat(3, redChannel, greenChannel, blueChannel);
I call them "channels" because that is the terminology Photoshop uses. You have to change the name of the arrays from redChannel to what yours are called. After you split apart your color channels and reprocessed them you have final_red. This, NOT redChannel, is what you need to use. You also need to not change from dimension 3 (which I had) to dimension 2. So the final code would be
% Recombine separate color channels into an RGB image.
rgbImage = cat(3, final_red,final_green,final_blue);
8 Comments
Chrissie Nyssen
on 1 Jul 2019
Edited: Chrissie Nyssen
on 1 Jul 2019
It's a 3D image if you are layering the R G B images on top of each other -
imgRGB = cat(3, R, G, B)
imshow (imgRGB)
More Answers (2)
Wayne King
on 23 Oct 2011
Hi, You don't want to concatenate along the column dimension. An RGB image has 3 dimensions. You want to concatenate along the 3rd dimension.
imdata = imread('ngc6543a.jpg');
RC = imdata(:,:,1);
GC = imdata(:,:,2);
BC = imdata(:,:,3);
im = cat(3,RC,GC,BC);
isequal(imdata,im)
imshow(im)
5 Comments
tablo tofiq
on 6 May 2016
Edited: Stephen23
on 6 May 2016
display image in three color red&green&blue
a=imread('autumn.tif');
a1=a;
a1(:,:,2)=0;
a1(:,:,3)=0;
subplot(3,1,1)
imshow(a1)
a2=a;
a2(:,:,1)=0;
a2(:,:,3)=0;
subplot(3,1,2)
imshow(a2)
a3=a;
a3(:,:,1)=0;
a3(:,:,2)=0;
subplot(3,1,3)
imshow(a3)
1 Comment
Stephen23
on 6 May 2016
Without three intermediate variables:
b = imread('autumn.tif');
b(:,:,4) = 0;
subplot(3,1,1)
imshow(b(:,:,[1,4,4]))
subplot(3,1,2)
imshow(b(:,:,[4,2,4]))
subplot(3,1,3)
imshow(b(:,:,[4,4,3]))
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