Alexei (Alyosha) Efros

Research Areas

Research Centers

Berkeley Artificial Intelligence Research Lab (BAIR)

Teaching Schedule

Fall 2025

CS 180. Intro to Computer Vision and Computational Photography, TuTh 12:30-13:59, Haas Faculty Wing F295
CS 280A. Intro to Computer Vision and Computational Photography, TuTh 12:30-13:59, Haas Faculty Wing F295

Biography

Alexei (Alyosha) Efros joined UC Berkeley in 2013. Prior to that, he was for a decade on the faculty of Carnegie Mellon University, and has also been affiliated with École Normale Supérieure/INRIA and University of Oxford. His research is in the area of computer vision and computer graphics, especially at the intersection of the two. He is particularly interested in using data-driven techniques to tackle problems where large quantities of unlabeled visual data are readily available. Efros received his PhD in 2003 from UC Berkeley. He is a recipient of CVPR Best Paper Award (2006), Sloan Fellowship (2008), Guggenheim Fellowship (2008), Okawa Grant (2008), SIGGRAPH Significant New Researcher Award (2010), three PAMI Helmholtz Test-of-Time Prizes (1999,2003,2005), the ACM Prize in Computing (2016), Diane McEntyre Award for Excellence in Teaching Computer Science (2019), Jim and Donna Gray Award for Excellence in Undergraduate Teaching of Computer Science (2023), and PAMI Thomas S. Huang Memorial Prize (2023).

Education

2003, PhD, Computer Science, UC Berkeley
1997, BS, Computer Science, University of Utah

Selected Publications

J. Zhu, T. Park, P. Isola, and A. A. Efros, "Unpaired image-to-image translation using cycle-consistent adversarial networks," in Proceedings of the IEEE International Conference on Computer Vision, 2017, pp. 2223--2232.
D. Pathak, P. Agrawal, A. A. Efros, and T. Darrell, "Curiosity-driven Exploration by Self-supervised Prediction," in International Conference on Machine Learning, 2017.
C. Doersch, A. Gupta, and A. A. Efros, "Unsupervised Visual Representation Learning by Context Prediction," in International Conference on Computer Vision (ICCV), 2015.
C. Doersch, S. Singh, A. Gupta, J. Sivic, and A. A. Efros, "What makes Paris look like Paris?," ACM Transactions on Graphics, vol. 31, no. 4, Aug. 2012.
T. Malisiewicz, A. Gupta, and A. Efros, "Ensemble of Exemplar-SVMs for Object Detection and Beyond," in International Conference on Computer Vision (ICCV), 2011.
A. Torralba and A. A. Efros, "Unbiased look at dataset bias," in Proceedings of the 2011 IEEE Conference on Computer Vision and Pattern Recognition, 2011, pp. 1521--1528.
T. Malisiewicz and A. A. Efros, "Beyond categories: The visual memex model for reasoning about object relationships," in Advances in Neural Information Processing Systems (NIPS), 2009, pp. 1222--1230.
J. Hays and A. A. Efros, "Scene completion using millions of photographs," ACM Transactions on Graphics (TOG), vol. 26, no. 3, pp. 4, 2007.
D. Hoiem, A. A. Efros, and M. Hebert, "Recovering surface layout from an image," International Journal of Computer Vision, vol. 75, no. 1, pp. 151--172, 2007.
A. A. Efros and T. K. Leung, "Texture synthesis by non-parametric sampling," in Proceedings of the seventh IEEE international conference on computer vision, Vol. 2, 1999, pp. 1033--1038.