1. Zhejiang University, Hangzhou, Zhejiang, China.
2. Key Laboratory of CS&AUS of Zhejiang Province, Hangzhou, China.
3. Fraunhofer IPMS, Dresden, Germany.
4. De La Salle University, Manila, Philippines.
5. University of Notre Dame, Notre Dame, IN 46614, USA.
6. University of California, Irvine, CA 92697, USA.