RC—Reflective Contrast

This index quantifies the difference in reflectivity between the hills and valleys of the surface topography. The algorithm separates the surface data into valleys and hills using a parameterized threshold height. It then calculates the mean reflectivity values for both areas and uses the contrast formula:

contrast = (hill + valley) / (hill − valley)

This provides a measure of how much the reflectivity differs between the elevated and depressed areas of the surface.