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Optical Engineering

Photometric stereo for general isotropic reflectances by spherical linear interpolation
Author(s): Si Li; Boxin Shi
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Paper 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.

Paper Details

Date Published: 21 August 2015
PDF: 11 pages
Opt. Eng. 54(8) 083104 doi: 10.1117/1.OE.54.8.083104
Published in: Optical Engineering Volume 54, Issue 8
Show Author Affiliations
Si Li, Brandeis Univ. (United States)
Boxin Shi, Singapore Univ. of Technology & Design (Singapore)

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