Specular highlights detection and reduction with multi-flash photography

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.

Bibliographic Details

Main Authors:	Feris,Rogerio, Raskar,Ramesh, Tan,Kar-Han, Turk,Matthew
Format:	Digital revista
Language:	English
Published:	Sociedade Brasileira de Computação 2006
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0104-65002006000200003
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