Modeling and Calibration for Multicolor Pseudo-random Encoded Flashlight Projector
LIAO Su-yin1, WU Xian-liang2, WEI Min1, LI Gui-hua1, ZHANG Mei1
1.Electrical Engineering and Automatization College of Anhui University, Hefei, Anhui 230039, China;2.Hefei Teachers College, Hefei, Anhui 230001, China
Abstract：To realize the 3D Euclidean reconstruction expecielly for dynamic 3D sciene based on single image,active vision technique , multicolor pseudo-random encoded flash projection system need to be modeled precalibrated. When the system parameters change, using pseudo random coding patterns of geometric constrains can realize the adaptive reconstruction of 3D scene without recalibration. A linear model is used for projector imaging process modeling based on the projector image quality without abnormal denaturation analysis. A high precision direct calibration method is presented for the projection system by measuring three-dimensional homogeneous coordinates of each projection coding feature points on the target to pre calibrate the internal and external parameters.Calibration accuracy is 0.1 cell. Euclidean reconstruction results is ideal.
［1］ Batlle J, Mouaddib E, Salvi J. Recent progress in coded structured light as a technique to solve the correspondence problem: a survey［J］. Pattern Recognition, 1998, 31(7):963-982.
［2］ Zemcik P, Frydrych M, Kalviainen H, et al. Multispectral Image Colour Encoding［C］// Barcelona.In Proceedings of the 5th International Conference on Pattern Recognition, Spain, 2000, 605-612.
［3］ 郎小虎,陈晓怀,等. 投影系统像差分析及优化设计［J］. 黑龙江科技学院学报, 2005,15(3):144-146,156.
［4］ 刘志健,费业泰,卢荣胜,等. 彩色伪随机编码闪光投影仪及其像质分析［J］. 合肥工业大学学报, 2004, 27(10):1119-1122.
［5］ 廖素引,马修水,李桂华,等. 机器视觉中基于彩色伪随机编码特征点匹配问题的研究［J］. 现代制造工程,2008,4(4) :16-18,57.
［6］ Jessie F, Williams M, et al. Pseudo-random sequences and arrays［J］. Proceedings of the IEEE, 1976, 64(12): 1715-1729.
［7］ 马颂德,张正友. 计算机视觉［M］.北京：科学出版社,2008.
［8］ Philippe Lavoie, Dan Ionescu, Emil Petriu. A high precision 3D object reconstruction method using a color-coded grid and NURBS［J］.Image Analysis and Processing, 1999:370-375.
［9］ 廖素引,吴先良,卫敏,等. 不标定三维欧氏重构中单幅彩色伪随机编码图像特征点提取方法研究［J］. 计量学报,2010, 31(3):214-218.
［10］ 张勇斌. 基于单幅编码图像三维场景不标定欧氏重构技术［D］. 合肥：合肥工业大学,2004.
［11］ 范利勤, 金施群, 唐黎莺,等. 基于彩色伪随机编码单幅图像的三维欧氏重构［J］.合肥工业大学学报(自然科学版), 2007,30(5):533-537.
2013, Vol. 34 
