MATLAB: How can i observe a 3 dimensional matrix(hdr) using pcolor command

Question

I have with me,

file={'img1.jpg','img2.jpg','img3.jpg','img4.jpg','img5.jpg'};
hdr = makehdr(file);

hdr is 1728x2592x3 single matrix

I want to display this image file in pseudocolor.

my aim is to get the light intensity values. What shall i do?

Thank you

Answer 1

image(rgb2gray(hdr));
colormap(gray(256))