combining RGB to get a full image
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prem preet
le 23 Oct 2011
Commenté : Srivatsan N
le 21 Juil 2020
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
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Image Analyst
le 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 commentaires
Chrissie Nyssen
le 1 Juil 2019
Modifié(e) : Chrissie Nyssen
le 1 Juil 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)
Plus de réponses (2)
Wayne King
le 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 commentaires
tablo tofiq
le 6 Mai 2016
Modifié(e) : Stephen23
le 6 Mai 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 commentaire
Stephen23
le 6 Mai 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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