% 4 patterns for 2+2 phase shifting algorithm (800*600 pixel % resolution for ACER 1161PA)
% 
% Related Reference:
% C. Zuo, Q. Chen, G. Gu, S. Feng, F. Feng,"High-speed three-dimensional profilometry for multiple objects with complex  
% shapes",Optics Express 20, 19493-19510 (2012). 
%
% last modified on 15/08/2016
% by Chao Zuo (surpasszuo@163.com, zuochao@njust.edu.cn)