How to concatenate only two planes of an image.

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Aditya
Aditya 2016-3-24
评论： Image Analyst 2023-1-14
I have split an RGB image into its 3 different components, now i need a new image that is just the combination of the red and green planes. How do I do this? I used the 'cat' function, and then displayed the image, but it just displays these images next to each other.

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回答（2 个）

Image Analyst
Image Analyst 2016-3-24
Try this
blackImage = zeros(size(redChannel), 'uint8');
rgbImage = cat(3, redChannel, greenChannel, blackImage);
imshow(rgbImage);
  2 个评论
Aditya
Aditya 2016-3-24
Thank you for helping, I have tried this already but i want the new image to be only in 2 dimensions not 3.
Image Analyst
Image Analyst 2016-3-25
Then to get a 2D image, stitch them together either side by side or top and bottom
tallImage = [redChannel; greenChannel];
wideImage = [redChannel, greenChannel];
Of course the images will be gray scale not color since to be color you need a third dimension.

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Azzi Abdelmalek
Azzi Abdelmalek 2016-3-24
img = imread('ngc6543a.jpg');
red = img(:,:,1); % Red
green = img(:,:,2); % Green
blue = img(:,:,3); % Blue
[n,m,~]=size(img)
a = zeros(n, m);
out=cat(3,red,green,a)
  3 个评论
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Vivek
Vivek 2023-1-14
Same problem Aditya I have two images and I want to make a single image from these two but using these commands the output image is in 3d dimension but I want to in 2D dimension.

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