Calibration and correction of lens distortion for two-dimensional digital speckle correlation measurement |
| |
Authors: | Jian Zhao Dong ZhaoZhe Zhang |
| |
Affiliation: | School of Technology, Beijing Forestry University, Beijing, China |
| |
Abstract: | Lens distortion practically presents in optical imaging system using in two-dimensional digital speckle correlation measurement (2D-DSCM) system, and gives rise to additional errors in the displacement and strain measurement. Camera calibration procedure is performed to obtain the coefficients of radial distortion and tangential distortion. The corrected displacement fields can be calculated using the distortion coefficient. The influence of distortion on displacement and strain measurement errors in experiment is further discussed. The three-point bending test result shows that the camera lens calibration method can effectively eliminate the effect of lens distortion and improve displacement and strain measurement accuracy. |
| |
Keywords: | Lens distortion correction Digital speckle correlation measurement Camera lens calibration Displacement |
本文献已被 ScienceDirect 等数据库收录! |