My research interests mainly lie in the areas of computer vision and machine learning. I am interested in developing statistical models that can accurately describe the imaging process but still allow for efficient inference algorithm to solve problems of visual inference.
My current research focuses on optical flow estimation. Enabled by naturalistic sequences associated with ground truth flow fields, we have learned a complete probabilistic model of optical flow (ECCV 2008 paper). We have also implemented the most widely cited Horn & Schunck method using currently common practices in optical flow estimation and found it performs on par with some more sophisticated methods published in the last few years (Middlebury flow evaluation results).
Deqing Sun and Wai-Kuen Cham. Postprocessing of Low Bit Rate Block DCT Coded Images based on a Fields of Experts Prior. IEEE Trans. Image Proc., 16(11), pp. 2743- 2751, Nov. 2007. [pdf] [ Matlab code] [more ]
Ce Liu and Deqing Sun. A Bayesian Approach to Adaptive Video Super Resolution. IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2011. Oral presentation. [pdf]
Deqing Sun, Erik Sudderth, and Michael J. Black. Layered image motion with explicit occlusions, temporal consistency, and depth ordering. Advances in Neural Information Processing Systems (NIPS) 2010. [pdf]
Deqing Sun, Stefan Roth, and Michael J. Black. Secrets of optical flow estimation and their principles. IEEE Conference on Computer Vision and Pattern Recognition (CVPR) 2010.[pdf] [MATLAB code] [technical report] [CIFAR talk slides] [Results on Middlebury training set]
Deqing Sun, Stefan Roth, J.P. Lewis, and Michael J. Black. Learning Optical Flow. European Conference on Computer Vision (ECCV) 2008 Oral presentation. [pdf] [abstract] [ECCV talk slides] [extra training data]
Deqing Sun and Wai-Kuen Cham. An Effective Postprocessing Method for Low Bit Rate Block DCT Coded Images. IEEE Conference on Acoustics, Speech, and Signal Processing (ICASSP) 2007. [pdf]
Yifeng Jiang, Jun Xie, Deqing Sun, and Hung-Tat Tsui. Shape Registration by Simultaneously Optimizing Representation and Transformation. Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI) 2007. [pdf]
Deqing Sun, Wai-Kuen Cham, and Junhao Xie. A New Postprocessing Algorithm of Low Bit Rate JPEG Coded Images. SPIE Conference on Visual Communication and Image Processing (VCIP) 2005.
Deqing Sun. Postprocessing of Images Coded Using Block DCT at Low Bit Rates. M.Phil. thesis, The Chinese University of Hong Kong, July 2007 (Supervised by Prof. Wai-Kuen Cham).
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