You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither SPIE nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the SPIE website.
1 March 2008Easy calibration technique for stereo vision using a circle grid
Combined with the digital image correlation (DIC), the stereo vision calibrated by a circle grid can be used to measure the surface deformation of a deformable body. The grid dot centers are taken as the calibration points. A subpixel localization technique was developed to precisely find the location of the edge points of a dot. A conical section was then fitted to the obtained edge points to locate the dot center so that the intrinsic and extrinsic camera parameters can be accurately extracted after the camera calibration. The baseline measurement error of the stereo vision was evaluated by performing rigid body translation tests. By using the DIC to find the conjugate pairs in stereo images, the calibrated stereo vision is used to measure the strain field of a tension test specimen to evaluate its applicability to the surface deformation measurement of a deformable body.
The alert did not successfully save. Please try again later.
Perng-Fei Luo, Joyce Wu, "Easy calibration technique for stereo vision using a circle grid," Opt. Eng. 47(3) 033607 (1 March 2008) https://doi.org/10.1117/1.2897237