Research Interest

Image/Video Indexing and Search, Search Engine, Machine Learning, Data Mining, Mobile Computing and Applications, Computer Vision and Photography, Social Networks;

Selected Publications   

• "On the Difficulty of Nearest Neighbor Search", Junfeng He, Sanjiv Kumar and Shih-Fu Chang, ICML 2012. Supplemental material Poster
• "Mobile Product Search with Bag of Hash Bits and Boundary Reranking", Junfeng He, Xianglong Liu, Tao Cheng, Jinyuan Feng, Tai-Hsu Lin, Hyunjin Chung and Shih-Fu Chang, CVPR 2012. Poster
• "Spherical Hashing", Jae-Pil Heo, YoungWoon Lee, Junfeng He, Shih-Fu Chang and Sung-eui Yoon, CVPR 2012 .
• "Mobile Product Search with Bag of Hash Bits", Junfeng He, Tai-hsu Lin, Jinyuan Feng and Shih-Fu Chang, ACM MM 2011 (Demo session) .
• "Compact Hashing with Joint Optimization of Search Accuracy and Time", Junfeng He, Regu Radhakrishnan, Shih-Fu Chang and Claus Bauer, CVPR 2011 (Oral) .
• "Scalable Similarity Search with Optimized Kernel Hashing", Junfeng He, Wei Liu and Shih-Fu Chang, KDD 2010 (Full Presentation).
• "Large Graph Construction for Scalable Semi-supervised Learning", Wei Liu, Junfeng He, and Shih-Fu Chang, ICML 2010.
• "Columbia University/VIREO-CityU/IRIT TRECVID2008 High-Level Feature Extraction and Interactive Video Search",  Shih-Fu Chang, Junfeng He, Yu-Gang Jiang, Elie El Khoury, Chong-Wah Ngo, Akira Yanagawa and Eric Zavesky, In NIST TRECVID Workshop 2008.
• "Fast Kernel Learning for Spatial Pyramid Matching", Junfeng He, Shih-Fu Chang and Lexing Xie, CVPR 2008. 
• "Limits of Learning-Based Superresolution Algorithms", Zhouchen Lin, Junfeng He, Xiaoou Tang, and Chi-Keung Tang, ICCV 2007.
• "Doctored JPEG Image Detection via DCT Coefficients Analysis" , Junfeng He, Zhouchen Lin, Lifeng Wang, and Xiaoou Tang, ECCV 2006.
• " Optimal Parameters for Locality-Sensitive Hashing", Malcolm Slaney, Yury Lifshits, and Junfeng He, Proceedings of IEEE, 2012 .
• "Limits of Learning-Based Superresolution Algorithms", Zhouchen Lin, Junfeng He, Xiaoou Tang, and Chi-Keung Tang, IJCV Vol. 80, No. 3, pp. 406-420, 2008.
• "Fast, Automatic and Fine-Grained Doctored JPEG Images Detection via DCT Coefficient Analysis",  Zhouchen Lin, Junfeng He, Lifeng Wang, and Xiaoou Tang, Pattern Recognition, 2009.
• "Table Detection in Online Ink Notes", Zhouchen Lin, Junfeng He, Zhicheng Zhong, Rongrong Wang, and Heung-Yeung Shum, IEEE Transaction on PAMI , Vol. 28, No. 8, pp. 13 41-13 46, August 2006.

International/US Patent

• Projection Based Hashing That Balances Robustness and Sensitivity of Media Fingerprints (Publication No. US 2011/0299721)
• Non-parametric Measurement of Media Fingerprint Weak Bits (Publication No. US 2012/0011128)
• Detecting Doctored JPEG Images (U.S. Patent Number: 7,439,989)
• Table Detection in Ink Notes (U.S. Patent Number: 7,583,841)
• Framework for Detecting a Structured Handwritten Object (U.S. Patent Number: 7,664,325)

Activities

• Reviewer for conferences: SIGGRAPH, ICCV, CVPR, ACM MM, etc.
• Reviewer for journals: TPAMI, TMM, TKDE, TCSVT, TIFS, TIP, etc.