徐奕博士长期从事视频图像处理与分析领域的研究，在信号处理、智能视频分析等方面有近20年的研究经验。在图像处理与应用研究方面，将超复数代数引入到数字媒体分析与处理、计算机视觉等领域的基本问题中，在超解析信号构建、多通道/多模态图像分析与处理方面积累了一系列的学术成果。相关成果得到海外专家的认可，并多次被邀请在国际会议和国外高校做特邀报告。在智能信息处理研究方面，着重研究基于视频内容分析的人脸识别（包括年龄、性别）、行为理解和异常事件检测。曾指导学生参加TRECvid2008和TRECvid2009视频检索国际比赛的事件检测单元，获得4个单项第一的优异成绩。2017年参加阿里云天池医疗大赛——肺部结节智能诊断，在全球2887个参赛团队中获得复赛第一名。2018年3月，参与筹建上海交通大学-加州大学洛杉矶分校机器学习与视觉联合研究中心，担任智慧医疗研究方向的local chair。

在IEEE Trans. on Image Processing, Pattern Recognition，CVPR，ICCV，ECCV，ICASSP，ICIP等英文学术期刊和会议上发表论文60余篇。授权发明专利12项，多次担任IEEE国际会议TPC委员，包括通信领域的BMSB、Asia-Pacific Conference on Communications国际会议；信号处理领域的ICASSP、SiPS国际会议等。担任IEEE Trans. on Image Processing、IEEE Trans. on Multimedia、Digital Image Processing等英文学术期刊的审稿人，编著英文书籍Geometric Algebra Computing for Engineering and Computer Science（章节：QWT: retrospective and new Applications），重点给出了四元小波在图像处理与分析中的创新技术与应用前景。

数字图像处理（B类，2009-2017）

图像处理与内容分析（2018-）

1、 Jie Zhang, Yi Xu, Bingbing Ni, “Geometric Constrained Joint Lane Segmentation and Lane Boundary Detection,” ECCV, 2018.

2、 Xuanyu Zhu, Yi Xu, Hongteng Xu, Changjian Chen, “Quaternion Convolution Neural Networks,” ECCV, 2018.

3、 Zan Shen, Yi Xu, Bingbing Ni, Minsi Wang, Jianguo Hu, Xiaokang Yang, “Crowd Counting via Adversarial Cross-Scale Consistency Pursuit,” CVPR, 2018.

4、 Peng Zhou, Bingbing Ni, Cong Geng, Jianguo Hu, Yi Xu, “Scale-Transferrable Object Detection, ” CVPR, 2018.

5、 He Wang, Yi Xu, Bingbing Ni, Lixue Zhuang, Hongteng Xu, “Flexible Network Binarization With Layer-Wise Priority,” ICIP, 2018.

6、 Mengyu Zhu, Yi Xu, Bingbing Ni, Xiaokang Yang, “Enhancing Pulmonary Nodule Detection via Cross-Modal Alignment,” 2017 IEEE Visual Communications and Image Processing, Florida, USA, Dec. 2017.

7、 Qiaobo Chen, Yi Xu, Bingbing Ni, Zan Shen, Xiaokang Yang, “Rain Removal via Residual Generation Cascading,” 2017 IEEE Visual Communications and Image Processing, Florida, USA, Dec. 2017.

8、 Zhenyu Duan, Jinpeng Lan, Yi Xu, Bingbing Ni, Lixue Zhuang, Xiaokang Yang, “Pedestrian Detection via Bi-directional Multi-scale Analysis,” ACM Multimedia, 2017.

9、 Rui Yang, Bingbing Ni, Chao Ma, Yi Xu, Xiaokang Yang, “Video Segmentation via Multiple Granularity Analysis,” CVPR, 2017.

10、 Chao Ma, Yi Xu, Bingbing Ni, Xiaokang Yang, “When Correlation Filters Meet Convolutional Neural Networks for Visual Tracking,” IEEE Signal Processing Letters, 23(10): 1454 - 1458, 2016.

11、Y. Zeng and Yi Xu, “Saliency detection using tensor sparse reconstruction residual analysis,” The 41st IEEE International Conference on Acoustics, Speech and Signal Processing, 2961-2965, Mar. 2016.

12、 Yi Xu, Licheng Yu, Hongteng Xu, Hao Zhang, Truong Nguyen, “Vector sparse representation of color images using quaternion matrix analysis,” IEEE Transactions on Image Processing, 2015, 24(4):1315-1329.

13、 Qing Yan, Yi Xu, Xiaokang Yang, Truong Nguyen, “Single Image Super-Resolution Based on Gradient Profile Sharpness”, IEEE Transaction on Image Processing, 24 (10) :3187-3202, Feb. 2015.

14、 Qing Yan, Yi Xu, Xiaokang Yang, Truong Nguyen, “HEASK: Robust homography estimation based on appearance similarity and keypoint correspondences,” Pattern Recognition，2014，47(1): 368-387.

15、 Qing Yan, Yi Xu, Xiaokang Yang, Truong Nguyen, “Separation of Weak Reflection from a Single Superimposed Image,” IEEE Signal Processing Letters, 2014, 21(10): 1173-1176.

16、Erkang Chen, Yi Xu, Xiaokang Yang, Wenjun Zhang, “Quaternion base optical flow estimation for robust object tracking,” Digital Signal Processing, 2013, 23(1): 118-125.

17、Lianyang Ma, Xiaokang Yang, Yi Xu, Jun Zhu, “A generalized EMD with body prior for pedestrian identification,” Journal of visual communication and image representation, 2013, 24(6): 708-716.