jpeg to rgb in matlab

You can convert JPEG image to RGB format in MATLAB as follows:

main.m
% read jpeg image
jpegImage = imread('path_to_jpeg_image.jpg');

% convert jpeg to rgb
rgbImage = ind2rgb(jpegImage, jet(256));

% show the image
imshow(rgbImage);
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In the above code, we first read the JPEG image from the specified path using the imread function. Then we convert the JPEG image to RGB format using the ind2rgb function, which maps the indexed image to a true-color RGB image. We use the jet colormap with 256 colors for the conversion. Finally, we display the RGB image using the imshow function.