Reproduce “Near-light Photometric Stereo with Symmetric Lights” on OpenResearch
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About this paper
Lilika Makabe, Heng Guo, Hiroaki Santo, Fumio Okura, Yasuyuki Matsushita
Researchers at Osaka University developed a near-light photometric stereo method that determines absolute surface normals and depth from symmetric light sources. The approach leverages a linear formulation and a light fall-off relaxation to provide a globally optimal solution without requiring an initial depth map or extensive light calibration.
Key insights
- Exploiting symmetric light source arrangements provides linear constraints that implicitly handle the unknown global light offset and surface point position, simplifying the problem.
- A principled relaxation of the light fall-off model, in conjunction with symmetric lights, transforms the non-linear near-light photometric stereo into a solvable linear system.
- The formulation ensures that the recovery of scaled distance and subsequently surface shape achieves a global optimum under the applied light fall-off relaxation.
Summary by alphaXiv.
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