IMSSTRETCH

IMSSTRETCH(r;l;h;m) performs a histogram stretch of the saturation in the RGB image in matrix r; scalar l (default 0) specifies the percentage of pixels to set to 0 (i.e. black), scalar h (default 0) specifies the percentage of pixels to set to white, and scalar m (0≤m≤255; default 128) specifies the colour value in each channel to be set to the middle intensity.