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Specular highlights detection and reduction with multi-flash photography

Abstract

We present a novel method to reduce the effect of specularities in digital images. Our approach relies on a simple modification of the capture setup: a multi-flash camera is used to take multiple pictures of the scene, each one with a differently positioned light source. We then formulate the problem of specular highlights reduction as solving a Poisson equation on a gradient field obtained from the input images. The obtained specular reduced image is further refined in a matting process with the maximum composite of the input images. Experimental results are demonstrated on real and synthetic images. The entire setup can be conceivably packaged into a self-contained device, no larger than existing digital cameras.

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Correspondence to Rogerio Feris.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License ( https://creativecommons.org/licenses/by/2.0 ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Feris, R., Raskar, R., Tan, KH. et al. Specular highlights detection and reduction with multi-flash photography. J Braz Comp Soc 12, 35–42 (2006). https://doi.org/10.1007/BF03192386

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  • DOI: https://doi.org/10.1007/BF03192386

Keywords

  • Specularities
  • Multi-Flash Imaging
  • Poisson Equation