Easy calibration technique for stereo vision using a circle grid

Perng-Fei Luo; Joyce Wu

doi:10.1117/1.2897237

1 March 2008 Easy calibration technique for stereo vision using a circle grid

Perng-Fei Luo, Joyce Wu

Author Affiliations +

Optical Engineering, Vol. 47, Issue 3, 033607 (March 2008). https://doi.org/10.1117/1.2897237

Abstract

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.

©(2008) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Perng-Fei Luo and Joyce Wu "Easy calibration technique for stereo vision using a circle grid," Optical Engineering 47(3), 033607 (1 March 2008). https://doi.org/10.1117/1.2897237

Published: 1 March 2008

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available