Convexity-based camouflage breaking

This paper presents biological evidence for camouflage breaking using the convexity of the intensity function. Some animals use apatetic coloring especially to prevent their detection by gray-level convexity. This implies that other animals might be able to break camouflage based on gray-level convexity. We demonstrate the effectiveness of convexity-based camouflage breaking using an operator ("D/sub arg/") for detection of 3D convex or concave gray levels. Its high robustness and the biological motivation make D/sub arg/ particularly suitable for camouflage breaking. As will be demonstrated, the operator is able to break very strong camouflage, which might delude even human viewers. Being nonedge-based, the performance of the operator is juxtaposed with that of a representative edge-based operator in the task of camouflage breaking. Better performance is achieved by D/sub arg/ for animal as well as military camouflage breaking.