1. A method comprising: receiving an inverse synthetic aperture radar image from an inverse synthetic aperture radar; generating a standard deviation profile from the image, the standard deviation profile representing a standard deviation of the image; normalizing the standard deviation profile to form a normalized standard deviation profile; generating a mean value profile from the image, the mean value profile representing a mean value deviation of the image; normalizing the mean value profile to form a normalized mean value profile; and combining the normalized standard deviation profile and the normalized mean value profile to form a sum normalized range profile.