write a function to match thermal imagery to rgb imagery in matlab

One way to match thermal imagery to RGB imagery in MATLAB is to use the imfuse function. imfuse performs an image fusion operation on two images. The function aligns the two specified input images, specifies how to blend the images, and then displays the fused image.

Here's an example function that takes in a thermal image and an RGB image and matches them:

main.m
function fusedIm = matchThermalToRGB(thermalIm, rgbIm)

    % Convert thermal image to grayscale so it can be fused with RGB image
    grayIm = mat2gray(thermalIm);
    % Resize grayscale image to match size of RGB image
    grayIm = imresize(grayIm, size(rgbIm(:,:,1)));
    % Fuse the two images using the 'falsecolor' blending method
    fusedIm = imfuse(rgbIm, grayIm, 'falsecolor', 'Scaling','joint','ColorChannels',[1 2 2]);
    % Display the fused image
    imshow(fusedIm);
end
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This example function converts the thermal image to grayscale using the mat2gray function, resizes the grayscale image to match the size of the RGB image using imresize, fuses the two images using the imfuse function with the 'falsecolor' blending method and the red and green channels from the RGB image, and then displays the fused image using imshow. You can adjust these settings to match your specific needs.