Coupled lighting direction and shape estimation from single images

Dimitrios Samaras, Dimitris Metaxas

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations


This paper presents a new method for the simultaneous estimation of lighting direction and shape from shading. The method estimates the shape and the lighting direction using a two step iterative process. We assume an initial (possibly incorrect) estimate of the lighting position. A stiff deformable model is then fitted to the image, assuming this lighting position. Next, a least-squares estimate of the lighting position is derived from the model using the Levenberg-Marquart method. The two steps - model fitting and lighting-position estimation - are iterated. Once the light direction has converged to a stable solution the deformable model stiffness is lowered and the model fits accurately given the lighting model. In addition, we show how the method can be used with either orthographic or perspective projection assumptions. In a variety of experiments on real and synthetic data, the method is robust to errors both to the initial light position and shape estimates.

Original languageEnglish (US)
Pages (from-to)868-874
Number of pages7
JournalProceedings of the IEEE International Conference on Computer Vision
StatePublished - 1999
Externally publishedYes
EventProceedings of the 1999 7th IEEE International Conference on Computer Vision (ICCV'99) - Kerkyra, Greece
Duration: Sep 20 1999Sep 27 1999

All Science Journal Classification (ASJC) codes

  • Software
  • Computer Vision and Pattern Recognition


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