A method of eliminating interreflection in 3D reconstruction using structured light 3D camera

Interreflection, which is one of main components of the global illumination effect, degrades the performance of structured light 3D camera. In this paper, we present a method of eliminating interreflection in 3D reconstruction using structured light 3D camera without any modification of the structured light pattern. The key idea is to rely on the patterns in final layer of HOC (Hierarchical Orthogonal Coding), where the effect of interreflection is weakest due to small light stripes in the pattern, to eliminate the reflected boundaries as well as fill the missing boundaries in upper layers. Experimental results show that the effect of interreflection in proposed algorithm is significantly reduced in comparison with original decoding method of HOC. The proposed method can be readily incorporated into existing structured light 3D cameras without any extra pattern or hardware.