Advanced sensor systems and applications II : 8-12 November, 2004, Beijing, China / Yun-Jiang Rao, Osuk Y. Kwon, Gang-Ding Peng, chairs/editors ; sponsored by SPIE--the International Society for Optical Engineering, COS--Chinese Optical Society ; cooperating organizations, Australian Optical Society [and others] ; supporting organizations, National Natural Science Foundation of China [and others].