Foremost, I would like to express my sincere gratitude to my advisor Prof. Ying Wu for the
continuous support of my Ph.D study and research, for his patience, motivation, enthusiasm, and
immense knowledge. His guidance helped me in all the time of research and writing of this thesis. I
could not have imagined having a better advisor and mentor for my Ph.D study.
Besides my advisor, I would like to thank the rest of my thesis committee: Prof. Aggelos
K.Katsaggelos, Prof. Thrasyvoulos N.Pappas, and Dr. James Crenshaw, for their encouragement,
insightful comments, and hard questions.
My sincere thanks also goes to Dr. James Crenshaw, Dr. Senthil Periaswamy, and Dr. Qiong Liu,
for offering me the summer internship opportunities in their groups and leading me working on
diverse exciting projects.
I thank my fellow labmates in Northwestern Vision Group: Gang Hua, Ting Yu, Zhimin Fan,
Shengyang Dai, Junsong Yuan, Jiang Xu, Jialue Fan, and Neelabh Gupta, for the stimulat