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Geometric calibration based on B-spline with multi-parameter and color correction based on transition template and decay function

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Abstract

To achieve low-cost and fast multi-channel surface projection geometric correction, the quadratic quasi-uniform B-spline surface is used to reconstruct the deformation screen, and the coordinates of the boundary mesh node are calculated as the texture mapping vertex coordinates by adjusting the position of the control point. On the DirectX platform, the main desktop image is obtained through frame buffer copy, by adjusting the shape parameters and moving the control points as a whole, the multi-projection screen is corrected and the coordinates are saved to realize the surface reconstruction. Compared with the no-parameter curve, by adding a plurality of shape parameters, the distance and the relationship between the control point and the curve are more precisely adjusted, and better correction can be realized. Then, feature image projection is performed between adjacent channels, and the color template is calculated according to the collected color information to apply to a video frame of one channel, thereby eliminating chromatic aberration caused by different projector lamp problems. Finally, a smooth luminance decay function is used to attenuate the highlights appearing in overlapping areas between adjacent channels. The experimental results of the two-channel stereoscopic projection system show that the method is simple and highly efficient, and it has lower requirements for equipment, which is easy to operate in the adjustment process, and has strong adaptability to the engineering environment.

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Acknowledgments

This work was financially supported by national science and technology support program (2015BAG20B05) and Hubei Provincial key laboratory of open fund (2016znss08B).

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Authors and Affiliations

  1. College of Computer Science and Technology, Wuhan University of Science and Technology, Wuhan, China

    Ya-ting Xue, Yao-jie Chen & Min Jiang

  2. Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System, Wuhan, China

    Ya-ting Xue & Yao-jie Chen

  3. College of Shipping, Wuhan University of Technology, Wuhan, China

    Yao-jie Chen

  4. Department of Computer Science, Portland State University, Portland, OR, USA

    Min Jiang

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  1. Ya-ting Xue
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  2. Yao-jie Chen
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Correspondence to Ya-ting Xue.

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Xue, Yt., Chen, Yj. & Jiang, M. Geometric calibration based on B-spline with multi-parameter and color correction based on transition template and decay function. Multimed Tools Appl 79, 4333–4346 (2020). https://doi.org/10.1007/s11042-018-6930-4

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  • DOI: https://doi.org/10.1007/s11042-018-6930-4

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