Title:	Mesh Parameterization for Content-aware Image Retargeting
Date:	July 24, 2009 (Friday)
Time:	3:00 p.m. - 4:00 p.m.
Venue:	Room 121, 1/F, Ho Sin-hang Engineering Building, The Chinese University of Hong Kong, Shatin, N.T.
Speaker:	Prof. Yanwen Guo Department of Computer Science and Technology Nanjing University Nanjing, China

ABSTRACT:

Mobile devices, such as cellular phones and PDAs, are increasingly common in daily uses. Images with much higher resolutions and different aspect ratios than the small screens of these devices need to be adapted to fit the target displays. Effective retargeting requires emphasizing the important content while retaining surrounding context with minimal visual distortion. In this talk, our recent work on content-aware image retargeting using mesh parameterization is presented. We first construct the representation which enables preservation of image structures during retargeting, and further formulate the image retargeting as a constrained image mesh parameterization problem that aims at finding a homomorphous target mesh with desired size. We associate image saliency into the image mesh and regard such structure as constraints for mesh parameterization. Using stretch-based mesh parameterization process, we obtain the homomorphous target mesh, which is then used to render the target image by texture mapping. The retargeting method emphasizes important image content while retaining the surrounding context with minimal visual distortion. Our proposed approach exhibits superior performance in several aspects compared to existing methods.

BIOGRAPHY:

Prof. Yanwen Guo is an associate professor at the National Key Laboratory for Novel Software Technology, Nanjing University. He received the PhD degree from Zhejiang University in 2006, and worked as a visiting researcher in Department of Computer Science, CUHK in 2006, a visiting professor in Department of Computer Science, University of Hong Kong in 2008. His research interests include image and video processing, and interactive geometry processing. He has published more than 20 technical papers refereed in graphics journals and international conferences, including IEEE Transactions on Visualization & Computer Graphics, IEEE Transactions on Multimedia, The Visual Computer, Computer Animation and Virtual Worlds. He has served as the principal/main investigator of several research projects including NSF of China and NSF Key project.

Enquiries: Miss Temmy So at tel 2609 8444

For more information, please refer to http://www.cse.cuhk.edu.hk/seminar