Imaging Components, Systems, and Processing

Photometric stereo for general isotropic reflectances by spherical linear interpolation

[+] Author Affiliations
Si Li

Brandeis University, Department of Computer Science, 415 South Street, Waltham, Massachusetts 02453, United States

Boxin Shi

Singapore University of Technology and Design, Pillar of Information Systems Technology and Design, 8 Somapah Road, 487372, Singapore

Opt. Eng. 54(8), 083104 (Aug 21, 2015). doi:10.1117/1.OE.54.8.083104
History: Received May 13, 2015; Accepted July 23, 2015
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Abstract.  We present a practical photometric stereo method that works with general isotropic reflectances. Unlike previous approaches that use special hardware setups or dense measurements, our method only requires dozens of random yet known lighting directions. By spherically interpolating the light source directions to approximate the scene appearance under desired lighting directions, our method separately computes azimuth and elevation angles of the surface normal for each pixel. The effectiveness and accuracy of the proposed method are validated using a measured reflectance database with 100 isotropic materials and various real-world objects.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Si Li and Boxin Shi
"Photometric stereo for general isotropic reflectances by spherical linear interpolation", Opt. Eng. 54(8), 083104 (Aug 21, 2015). ; http://dx.doi.org/10.1117/1.OE.54.8.083104


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