Estimating Illumination Chromaticity Based on Structured Support Vector Machine

Abstract

Illumination estimation is crucial to the color constancy problem. Most existing color constancy algorithms assume uniform illumination. However, in real-world scenes, this is not often the case. Thus, we propose a novel framework for estimation the colors of multiple illuminants and their spatial distribution in the scene. We formulate this problem as an illuminant color estimate is obtained independently from distinct image main-regions. We think there is only one kind of light in each main-regions. From these main-regions a robust local illumination color is computed by consensus. So we can solve the problem of multiple illumination estimation using single illuminant color constancy method. The performance if our method is evaluated on multiple data sets. Experimental results show that we can reliably process mixed illuminant scenes.