ML Anthology

Photometric Stereo for Outdoor Webcams

Jens Ackermann, Fabian Langguth, Simon Fuhrmann, Michael Goesele
CVPR 2012 pp. 262-269
doi:10.1109/CVPR.2012.6247684 /cvpr/2012/ackermann2012cvpr-photometric/

Abstract

We present a photometric stereo technique that operates on time-lapse sequences captured by static outdoor webcams over the course of several months. Outdoor webcams produce a large set of uncontrolled images subject to varying lighting and weather conditions. We first automatically select a suitable subset of the captured frames for further processing, reducing the dataset size by several orders of magnitude. A camera calibration step is applied to recover the camera response function, the absolute camera orientation, and to compute the light directions for each image. Finally, we describe a new photometric stereo technique for non-Lambertian scenes and unknown light source intensities to recover normal maps and spatially varying materials of the scene.

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Text

Ackermann et al. "Photometric Stereo for Outdoor Webcams." IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2012. doi:10.1109/CVPR.2012.6247684

Markdown

[Ackermann et al. "Photometric Stereo for Outdoor Webcams." IEEE/CVF Conference on Computer Vision and Pattern Recognition, 2012.](https://mlanthology.org/cvpr/2012/ackermann2012cvpr-photometric/) doi:10.1109/CVPR.2012.6247684

BibTeX

@inproceedings{ackermann2012cvpr-photometric,
  title     = {{Photometric Stereo for Outdoor Webcams}},
  author    = {Ackermann, Jens and Langguth, Fabian and Fuhrmann, Simon and Goesele, Michael},
  booktitle = {IEEE/CVF Conference on Computer Vision and Pattern Recognition},
  year      = {2012},
  pages     = {262-269},
  doi       = {10.1109/CVPR.2012.6247684},
  url       = {https://mlanthology.org/cvpr/2012/ackermann2012cvpr-photometric/}
}