[1] Philips Res Europe, Image & Video Proc Dept, NL-5656 AE Eindhoven, Netherlands
[2] Civolut Technol, Eindhoven, Netherlands
[3] Chinese Acad Sci, Xian, Peoples R China
[4] Eindhoven Univ Technol, NL-5600 MB Eindhoven, Netherlands
[5] Univ Chicago, Chicago, IL 60637 USA