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| Image matting evaluation results | Competition: Low resolution High resolution Error type: SAD MSE Gradient Connectivity |
| Sum of Absolute Differences |
overall |
avg. small |
avg. large |
avg. user |
Troll (Strongly Transparent) Input |
Doll (Strongly Transparent) Input |
Donkey (Medium Transparent) Input |
Elephant (Medium Transparent) Input |
Plant (Little Transparent) Input |
Pineapple (Little Transparent) Input |
Plastic bag (Highly Transparent) Input |
Net (Highly Transparent) Input |
||||||||||||||||
| rank | rank | rank | rank | small | large | user | small | large | user | small | large | user | small | large | user | small | large | user | small | large | user | small | large | user | small | large | user | |
| Improved color matting | 1.8 | 1.8 | 1.9 | 1.8 | 14.9 2 | 24.5 4 | 20 3 | 6.7 2 | 9.5 2 | 8.5 2 | 4.6 1 | 6.1 2 | 4.3 2 | 2.6 3 | 5.4 2 | 3.4 3 | 7.5 2 | 9.9 1 | 12.5 1 | 6 1 | 10.1 1 | 8.4 1 | 26.1 2 | 26.7 2 | 23.6 1 | 23.8 1 | 25.6 1 | 26.7 1 |
| Closed-Form Matting | 2.9 | 2.8 | 2.4 | 3.5 | 12.7 1 | 21.9 3 | 17.2 1 | 5.9 1 | 8.5 1 | 8.6 3 | 4.7 2 | 6 1 | 4.3 1 | 2.2 1 | 4.6 1 | 3.3 2 | 9.3 5 | 12.1 2 | 19.3 5 | 8.3 5 | 14.9 5 | 13.4 6 | 34.2 5 | 32.4 4 | 27.4 3 | 26.5 2 | 25.7 2 | 48.3 7 |
| Large Kernel Matting | 3.4 | 3.8 | 3.4 | 3 | 17.2 3 | 21.8 2 | 20.7 4 | 7.2 3 | 9.6 3 | 8.4 1 | 5.3 5 | 6.6 5 | 4.6 3 | 2.9 5 | 8.2 5 | 4.2 4 | 8.6 4 | 12.1 3 | 14.7 2 | 8 4 | 13.4 3 | 11.2 4 | 33 3 | 31.8 3 | 26.1 2 | 32.1 3 | 32 3 | 38.4 4 |
| Robust Matting | 3.9 | 3 | 4.4 | 4.3 | 17.3 4 | 28.4 6 | 21.1 5 | 10.1 5 | 16.9 7 | 11.4 5 | 4.8 3 | 6.5 4 | 5 5 | 2.8 4 | 7.3 4 | 4.4 5 | 7.3 1 | 14 5 | 18.1 4 | 6.8 2 | 14.6 4 | 10.6 3 | 22.7 1 | 26.1 1 | 32.1 4 | 34.4 4 | 37 4 | 38 3 |
| High-res matting | 4.8 | 4.5 | 5.4 | 4.4 | 18.6 6 | 25.8 5 | 24.6 6 | 8.6 4 | 14.1 4 | 11.1 4 | 5 4 | 6.2 3 | 4.8 4 | 2.5 2 | 8.3 6 | 3.2 1 | 7.8 3 | 14 4 | 21.4 6 | 8.5 6 | 18.1 8 | 12.2 5 | 35.3 6 | 38.1 6 | 42.6 7 | 38.7 5 | 54.6 7 | 36.8 2 |
| Random Walk Matting | 6.7 | 7.3 | 6 | 6.8 | 17.9 5 | 20.3 1 | 19.4 2 | 11.3 6 | 15.6 5 | 11.8 6 | 5.8 6 | 7 6 | 6.3 8 | 3.4 6 | 6.7 3 | 4.6 6 | 13.1 8 | 22.1 8 | 27.4 8 | 12.3 9 | 18 7 | 15.7 9 | 44.1 9 | 43.5 9 | 41 6 | 75.1 9 | 81.8 9 | 80.6 9 |
| Geodesic Matting | 7.3 | 7.8 | 6.9 | 7.1 | 26.9 9 | 38.5 9 | 32.5 9 | 14.2 7 | 16.5 6 | 17.4 7 | 11.7 10 | 14 11 | 9.4 10 | 7.6 10 | 15.1 9 | 8.7 10 | 12.8 7 | 16.7 7 | 15.1 3 | 7.3 3 | 12.1 2 | 9.8 2 | 37.3 8 | 37.4 5 | 42.8 8 | 48.6 8 | 50 6 | 48.6 8 |
| Iterative BP Matting | 7.7 | 7.1 | 7.8 | 8.1 | 23.6 7 | 29.9 7 | 27.2 7 | 16.7 8 | 24.3 9 | 20.7 10 | 6.7 8 | 9 8 | 6.3 7 | 3.8 7 | 11.3 8 | 6.8 9 | 14.1 9 | 22.8 9 | 27.9 9 | 11.4 8 | 19 9 | 14.7 7 | 33.4 4 | 39.3 7 | 47.5 10 | 40.6 6 | 48.1 5 | 45.1 6 |
| Easy Matting | 8 | 8.1 | 7.9 | 8 | 23.9 8 | 32.6 8 | 30 8 | 17.1 9 | 21.8 8 | 19.4 9 | 6.3 7 | 7.5 7 | 5.8 6 | 4.7 8 | 10.5 7 | 5.6 7 | 12.1 6 | 15.7 6 | 22.9 7 | 11.2 7 | 17 6 | 14.8 8 | 49.5 10 | 49.6 10 | 46.2 9 | 77.8 10 | 108.6 11 | 109.2 10 |
| Bayesian Matting | 9 | 9 | 9.5 | 8.4 | 30.3 10 | 42.4 10 | 33.4 10 | 19.2 10 | 25.8 10 | 18.4 8 | 10.8 9 | 12.4 9 | 10.8 11 | 6.6 9 | 18.5 11 | 6.2 8 | 14.2 10 | 29.8 10 | 33.2 10 | 15.4 10 | 30.6 10 | 19.7 10 | 35.8 7 | 40.6 8 | 39.6 5 | 45.3 7 | 76.8 8 | 43.6 5 |
| Poisson Matting | 10.8 | 11 | 10.6 | 10.8 | 51.8 11 | 56.2 11 | 52 11 | 28.3 11 | 43.5 11 | 30.7 11 | 12.1 11 | 13.7 10 | 9.2 9 | 11.7 11 | 18.4 10 | 11.2 11 | 22.4 11 | 36.8 11 | 55.5 11 | 21.4 11 | 32.2 11 | 22.7 11 | 53.6 11 | 72.9 11 | 58.4 11 | 125.5 11 | 84.8 10 | 139.7 11 |
| Troll - Input image   Drag the window to change the zoom. |
References
| Method | Reference and notes | Implementation details |
| Closed-Form Matting | A. Levin, D. Lischinski, Y. Weiss, A Closed Form Solution to Natural Image Matting, CVPR, 2006 | Matlab implementation on a Intel Core2 Quad with 2.4 GHZ |
| Bayesian Matting | Y.Y. Chuang, B. Curless, D. Salesin, R. Szeliski, A Bayesian Approach to Digital Matting, CVPR, 2001 | C++ implementation on a Intel Core2 Quad with 2.4 GHZ |
| Poisson Matting | J. Sun, J. Jia, C.K. Tang, H.Y. Shum, Poisson matting, SIGGRAPH, 2004 | Matlab implementation on a Intel Core2 Quad with 2.4 GHZ |
| Easy Matting | Y. Guan, W. Cheny, X. Liang, Z. Ding, Q. Peng, Easy Matting: A Stroke Based Approach for Continuous Image Matting, Eurographics, 2006 | C++ implementation on a Intel Core2 Quad with 2.4 GHZ |
| Random Walk Matting | L. Grady, T. Schiwietz, S. Aharon, Random Walks For Interactive Alpha-Matting, VIIP, 2005 | Matlab/C++ implementation on a Intel Core2 Quad with 2.4 GHZ |
| Robust Matting | J. Wang, M. Cohen, Optimized Color Sampling for Robust Matting, CVPR, 2007 | C++ implementation on a Intel Core2 Quad with 2.4 GHZ |
| Geodesic Matting | Xue Bai, Guillermo Sapiro, A geodesic framework for fast interactive image and video segmentation and matting, ICCV 2007 | C++ implementation on a Intel Core2 Duo with 2.53 GHZ |
| Iterative BP Matting | Jue Wang, Michael Cohen, Jue Wang and Michael F. Cohen. An iterative optimization approach for unified image segmentation and matting. ICCV 2005. | c++ implementation on a Intel Core2 Quad with 3 GHZ |
| Improved color matting | C. Rhemann, C. Rother, M. Gelautz, Improving Color Modeling for Alpha Matting. BMVC, 2008 | Matlab implementation on a Intel Core2 Duo with 2.4 GHZ |
| High-res matting | C. Rhemann, C. Rother, A. Rav-Acha, M. Gelautz, T. Sharp, High ResolutionMatting via Interactive Trimap Segmentation. CVPR, 2008 | Matlab/C++ implementation on a Intel Core2 Duo with 2.4 GHZ |
| Large Kernel Matting | Kaiming He, Jian Sun, and Xiaoou Tang, Fast Matting using Large Kernel Matting Laplacian Matrices, CVPR 2010 | C++ implementation on a Intel Core Duo with 2 GHZ |