3D Measurement Technology by Structured Light Using Stripe-Edge-Based Gray Code
(0) The key problem of 3D vision measurement using triangle method based onstructured light is to acquiring projecting angle of projecting light accurately. In order to acquire projecting angle thereby determine the corresponding relationship between sampling point and image point, method for encoding and decoding structured light based on stripe edge of Gray code is presented. The method encoded with Gray code stripe and decoded with stripe edge acquired by sub-pixel technology instead of pixel centre, so latter one-bit decoding error was removed. Accuracy of image sampling point location and correspondence between image sampling point and object sampling point achieved sub-pixel degree. In addition, measurement error caused by dividing projecting angle irregularly by even-width encoding stripe was analysed and corrected. Encoding and decoding principle and decoding equations were described. Finally, 3dsmax and Matlab software were used to simulate measurement system and reconstruct measured surface. Indicated by experimental results, measurement error is about 0.05％.
H B Wu Y Chen M Y Wu C R Guan X Y Yu
College of Measurement-Control Tech & Communications Engineering, Harbin University of Science and Technology, Harbin, 150080, China
国际会议
第四届仪器科学与技术国际会议( 4th International Symposium on Instrumentation and Science and Tcchnology)
哈尔滨
英文
537-541
2006-08-08（万方平台首次上网日期，不代表论文的发表时间）