31 January 2013 Compensating specular highlights for non-Lambertian projection surfaces
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J. of Electronic Imaging, 22(1), 011004 (2013). doi:10.1117/1.JEI.22.1.011004
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.
© 2013 SPIE and IS&T
Chen-Tai Kao, Tai-Hsiang Huang, Hua Lee, Homer H. Chen, "Compensating specular highlights for non-Lambertian projection surfaces," Journal of Electronic Imaging 22(1), 011004 (31 January 2013). http://dx.doi.org/10.1117/1.JEI.22.1.011004
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KEYWORDS
Cameras

Calibration

Projection systems

Image quality

3D modeling

Distortion

Visualization

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