Affiliation: | * Department of Computing Studies, Hong Kong Baptist University, Kowloon Tong, Kowloon, Hong Kong † Department of Computer Science, Korea University, 1, 5-ka, Anamdashdong, Seongbuk-ku, Seoul 136–701, Korea ‡ Centre for Pattern Recognition and Machine Intelligence, Concordia University, 1455 de Maisonneuve Blvd., West Montreal, Quebec H3G 1M8, Canada |