The function isrgb can't really tell. Finally, there was this important principle of Image Processing Toolbox function design: Except for functions that MUST associate a value with a particular color, toolbox functions should make no particular assumptions about the valid range of input values.What is RGB image in MATLAB?
In MATLAB, an RGB image is basically a M*N*3 array of colour pixel, where each colour pixel is associated with three values which correspond to red, blue and green colour component of RGB image at a specified spatial location.What does ind2rgb(X) mean?
RGB = ind2rgb(X,map) converts the indexed image X and corresponding colormap map to RGB (truecolor) format.What is the range of colors in MATLAB?
Colors in Matlab are coded with three numbers : the Red, Green and Blue (RGB) values. Go back to the reference page. W hile RGB are usually given on a scale from 0 to 255, the Matlab RGB scale goes from 0 to 1 (yeah, it would be too easy otherwise).