Xiaofeng Ren, Liefeng Bo. Discriminatively Trained Sparse Code Gradients for Contour Detection. In Peter L. Bartlett, Fernando C. N. Pereira, Christopher J. C. Burges, Léon Bottou, Kilian Q. Weinberger, editors, Advances in Neural Information Processing Systems 25: 26th Annual Conference on Neural Information Processing Systems 2012. Proceedings of a meeting held December 3-6, 2012, Lake Tahoe, Nevada, United States. pages 593-601, 2012. [doi]