Mutilspectral image to RGB

I would like to convert the attached multispectral images to RGB in matlab. Please help with the code.

[Walter Roberson]

https://www.mathworks.com/matlabcentral/fileexchange/76796-image-processing-toolbox-hyperspectral-imaging-library

Answer 1

[Bjorn Gustavsson]

To simply put each image into one of the R, G or B-layers of an RGB-image just do this:

img = peaks(12); % just something to give 
img1 = img;      % us three different
img2 = img1*0.7; % images with different
img3 = img2*0.7; % intensities
C1 = 1; % Possible 
C2 = 1; % intensity
C3 = 1; % scaling-factors
rgbimg = cat(3,img1*C1,img2*C2,img3*C3);

Now matlab expects RGB-images in double format to be between 0 and 1 to display them with functions like imagesc, so you might want to rescale rgbimg:

rgbimg = (rgbimg - min(rgbimg(:)))/(max(rgbimg(:)) - min(rgbimg(:)));

HTH

[Walter Roberson]

Note that rescaling can be done with rescale() in current versions of MATLAB, or with the deceptively named mat2gray() in older versions.