ML Anthology

Estimation of Illuminant Direction, Albedo, and Shape from Shading

Qinfen Zheng, Rama Chellappa
CVPR 1991 pp. 540-545
doi:10.1109/CVPR.1991.139750 /cvpr/1991/zheng1991cvpr-estimation/

Abstract

A robust approach to recovery of shape from shading information is presented. Assuming uniform albedo and Lambertian surface for the imaging model, methods are presented for the estimation of illuminant direction and surface albedo. The illuminant azimuth is estimated by averaging local estimates. The illuminant elevation and surface albedo are estimated from image statistics. Using the estimated reflectance map parameters, the surface shape is computed using a procedure that implements the smoothness constraint by enforcing the gradients of reconstructed intensity to be close to the gradients of the input image. Typical results on real images are given to illustrate the usefulness of this approach.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

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Cite

Text

Zheng and Chellappa. "Estimation of Illuminant Direction, Albedo, and Shape from Shading." IEEE/CVF Conference on Computer Vision and Pattern Recognition, 1991. doi:10.1109/CVPR.1991.139750

Markdown

[Zheng and Chellappa. "Estimation of Illuminant Direction, Albedo, and Shape from Shading." IEEE/CVF Conference on Computer Vision and Pattern Recognition, 1991.](https://mlanthology.org/cvpr/1991/zheng1991cvpr-estimation/) doi:10.1109/CVPR.1991.139750

BibTeX

@inproceedings{zheng1991cvpr-estimation,
  title     = {{Estimation of Illuminant Direction, Albedo, and Shape from Shading}},
  author    = {Zheng, Qinfen and Chellappa, Rama},
  booktitle = {IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  year      = {1991},
  pages     = {540-545},
  doi       = {10.1109/CVPR.1991.139750},
  url       = {https://mlanthology.org/cvpr/1991/zheng1991cvpr-estimation/}
}