Special Section on Mobile Computational Photography

Compensating specular highlights for non-Lambertian projection surfaces

[+] Author Affiliations
Chen-Tai Kao

National Taiwan University, Graduate Institute of Communication Engineering, Taipei, Taiwan

Tai-Hsiang Huang

National Taiwan University, Graduate Institute of Communication Engineering, Taipei, Taiwan

Hua Lee

University of California, Department of Electrical and Computer Engineering, Santa Barbara, California

Homer H. Chen

National Taiwan University, Graduate Institute of Communication Engineering, Taipei, Taiwan

J. Electron. Imaging. 22(1), 011004 (Jan 31, 2013). doi:10.1117/1.JEI.22.1.011004
History: Received September 5, 2012; Revised November 26, 2012; Accepted December 21, 2012
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Abstract.  This paper concerns the compensation of specular highlight for handheld image projectors. By employing a projector-camera configuration, where the camera is aligned with the viewer, the distortion caused by nonideal (e.g., colored, reflective) projection surfaces can be estimated from the captured image and compensated for accordingly to improve the projection quality. This works fine when the viewing direction relative to the system is fixed. However, the compensation becomes inaccurate when this condition changes, because the position of the specular highlight changes as well. We propose a novel method that, without moving the camera, can estimate the specular highlight seen from any position and integrate it with Grossberg’s radiometric compensation framework to demonstrate how view-dependent compensation can be achieved. Extensive results, both objective and subjective, are provided to demonstrate the performance of the proposed algorithm.

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Citation

Chen-Tai Kao ; Tai-Hsiang Huang ; Hua Lee and Homer H. Chen
"Compensating specular highlights for non-Lambertian projection surfaces", J. Electron. Imaging. 22(1), 011004 (Jan 31, 2013). ; http://dx.doi.org/10.1117/1.JEI.22.1.011004


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