Shadow ,detection and removal ,in real ,scene images ,is always ,a challenging but yet intriguing problem. In contrast with the rapidly expanding and continuous interests on this area, the authors are unaware of any comprehensive,surveys on this topic. This paper aimed to give a comprehensive and,critical survey ,of current ,shadow ,detection and ,removal ,methods. Algorithms are categorized into
... [Show full abstract] there sets by their ,different functions and assumptions,about the scenes. A discussion of reasonable evaluation is given at the end of this survey.