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Red-Eyes Removal through Cluster-Based Boosting on Gray Codes

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Author(s): Battiato Sebastiano | Farinella GiovanniMaria | Guarnera Mirko | Messina Giuseppe | Ravì Daniele

Journal: EURASIP Journal on Image and Video Processing
ISSN 1687-5176

Volume: 2010;
Issue: 1;
Start page: 909043;
Date: 2010;
Original page

ABSTRACT
Since the large diffusion of digital camera and mobile devices with embedded camera and flashgun, the redeyes artifacts have de facto become a critical problem. The technique herein described makes use of three main steps to identify and remove red eyes. First, red-eye candidates are extracted from the input image by using an image filtering pipeline. A set of classifiers is then learned on gray code features extracted in the clustered patches space and hence employed to distinguish between eyes and non-eyes patches. Specifically, for each cluster the gray code of the red-eyes candidate is computed and some discriminative gray code bits are selected employing a boosting approach. The selected gray code bits are used during the classification to discriminate between eye versus non-eye patches. Once red-eyes are detected, artifacts are removed through desaturation and brightness reduction. Experimental results on a large dataset of images demonstrate the effectiveness of the proposed pipeline that outperforms other existing solutions in terms of hit rates maximization, false positives reduction, and quality measure.
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