Interactive Media Systems, TU Vienna

A Perceptually Motivated Online Benchmark for Image Matting

By Christoph Rhemann, Carsten Rother, Jue Wang, Margrit Gelautz, Pushmeet Kohli, and Pamela Rott


The availability of quantitative online benchmarks for low-level vision tasks such as stereo and optical flow has led to significant progress in the respective fields. This paper introduces such a benchmark for image matting. There are three key factors for a successful benchmarking system: (a) a challenging, high-quality ground truth test set; (b) an online evaluation repository that is dynamically updated with new results; (c) perceptually motivated error functions. Our new benchmark strives to meet all three criteria. We evaluated several matting methods with our benchmark and show that their performance varies depending on the error function. Also, our challenging test set reveals problems of existing algorithms, not reflected in previously reported results. We hope that our effort will lead to considerable progress in the field of image matting, and welcome the reader to visit our benchmark at


C. Rhemann, C. Rother, J. Wang, M. Gelautz, P. Kohli, P. Rott: "A Perceptually Motivated Online Benchmark for Image Matting"; Poster: IEEE Conference on Computer Vision and Pattern Recognition, 2009. CVPR '09, Miami, Florida, USA; 06-20-2009 - 06-25-2009; in: "Proceddings of the IEEE Conference on Computer Vision and Pattern Recognition", (2009), 8 pages.


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