Variational uncalibrated photometric stereo under general lighting
Haefner B, Ye Z, Gao M, Wu T, Queau Y, Cremers D (2019)
Publication Type: Conference contribution
Publication year: 2019
Publisher: Institute of Electrical and Electronics Engineers Inc.
Book Volume: 2019-October
Pages Range: 8538-8547
Conference Proceedings Title: Proceedings of the IEEE International Conference on Computer Vision
Event location: Seoul, KOR
ISBN: 9781728148038
Abstract
Photometric stereo (PS) techniques nowadays remain constrained to an ideal laboratory setup where modeling and calibration of lighting is amenable. To eliminate such restrictions, we propose an efficient principled variational approach to uncalibrated PS under general illumination. To this end, the Lambertian reflectance model is approximated through a spherical harmonic expansion, which preserves the spatial invariance of the lighting. The joint recovery of shape, reflectance and illumination is then formulated as a single variational problem. There the shape estimation is carried out directly in terms of the underlying perspective depth map, thus implicitly ensuring integrability and bypassing the need for a subsequent normal integration. To tackle the resulting nonconvex problem numerically, we undertake a two-phase procedure to initialize a balloon-like perspective depth map, followed by a 'lagged' block coordinate descent scheme. The experiments validate efficiency and robustness of this approach. Across a variety of evaluations, we are able to reduce the mean angular error consistently by a factor of 2-3 compared to the state-of-the-art.
Involved external institutions
Technische Universität München (TUM)
Germany (DE)
Artisense GmbH
Germany (DE)
Groupe de Recherche en Informatique, Image, Automatique et Instrumentation de Caen (GREYC)
France (FR)
Germany (DE)
Artisense GmbH
Germany (DE)
Groupe de Recherche en Informatique, Image, Automatique et Instrumentation de Caen (GREYC)
France (FR)
How to cite
APA:
Haefner, B., Ye, Z., Gao, M., Wu, T., Queau, Y., & Cremers, D. (2019). Variational uncalibrated photometric stereo under general lighting. In Proceedings of the IEEE International Conference on Computer Vision (pp. 8538-8547). Seoul, KOR: Institute of Electrical and Electronics Engineers Inc..
MLA:
Haefner, Bjoern, et al. "Variational uncalibrated photometric stereo under general lighting." Proceedings of the 17th IEEE/CVF International Conference on Computer Vision, ICCV 2019, Seoul, KOR Institute of Electrical and Electronics Engineers Inc., 2019. 8538-8547.
BibTeX: Download