Performance analysis on a new binary amplitude-based phase-only-encoded barcode
Xu Dong Wu, Jiasheng Hu, Kenan Wu, Yong Lin · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2007
In this paper, we propose a new encoding method to make a binary amplitude-based phase-only-encoded barcode in a security system based on the conventional random phase encoding technique. In this method, the values of the phase distribution in the system are quantified with a high phase level, and afterwards the result is encoded into a binary matrix based on the rule of decimal-binary conversion. The binary matrix is arranged specially and printed as the 2-D anti-counterfeit label which can be printed by standard halftoning technology and read by optical scanning device. It is obvious that the higher phase level could be chosen to obtain the better reconstruction image in the improved method and the fabrication is also very convenient. In additions, computer simulations and optical scanning experiments are illustrated in detail. The tolerance to data loss of the encoded barcode is also studied particularly. The results show that the presented encoding method has advantage of robustness and high security, and very convenient to be popularized in practice.