Machine Vision, Pattern Recognition

Projector calibration from the camera image point of view

[+] Author Affiliations
Xu Zhang

Shanghai Jiao Tong University,School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai 200240 China

Limin Zhu

Shanghai Jiao Tong University,School of Mechanical Engineering, State Key Laboratory of Mechanical System and Vibration, Shanghai 200240 China

Opt. Eng. 48(11), 117208 (November 25, 2009). doi:10.1117/1.3265551
History: Received July 16, 2009; Revised September 30, 2009; Accepted October 02, 2009; Published November 25, 2009; Online November 25, 2009
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The traditional projector calibration always assumes that the reprojection errors on the projector image are independent and identically distributed and utilize the same method as the camera calibration. Actually, even if the measured points on the camera image are independent and identically distributed Gaussian variables, it is impossible to obtain the statistical characteristics of the reprojection errors on the projector image, because the relation between the original measurement error and the reprojection error is nonlinear. We propose a method to estimate the projector parameters according to the camera image reprojection error. It does not require us to know the statistical characteristics of the projector image point and makes full use of the background knowledge of the camera image noise, because our cost function does not concern the reprojection error on the projector image as is the case in the traditional method. The simulations and experiments affirm that this method has higher precision, even if the real noise is not normal.

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© 2009 Society of Photo-Optical Instrumentation Engineers

Citation

Xu Zhang and Limin Zhu
"Projector calibration from the camera image point of view", Opt. Eng. 48(11), 117208 (November 25, 2009). ; http://dx.doi.org/10.1117/1.3265551


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