MATLAB: I cant display the image

Question

O have an image and its size 832x2016x8 uint16. It is a satellite image and i tried rgb combinations. But imshow figure is always black. What else i can do it? I resized the image but it is not a solutions? How can i display a multispectral image on matlab?

Answer 1

RGB images use 3 channels. You image has 8 channels. Therefor you have to consider how to reduce the channel size.

img = randi([0, intmax('uint16')], 832, 2016, 8, 'uint16');  % Test data
rgb = im2double(img(:, :, 1:3));  % For example
imshow(rgb)

Or perhaps:

img = double(img);
rgb = cat(3, sum(img(:, :, [1,2,3]), 3), ...
             sum(img(:, :, [4,5,6]), 3), ...
             sum(img(:, :, [7, 8]),  3));
rgb = rgb / max(rgb(:));