行人检测代码（PAC+CCF）

代码说明：

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Copyright (C) 2015, Wei Ke, Qixiang Ye and Jianbin Jiao: Electrical Engineering,  Chinese Academy of Science This software is permitted to freely use for acdemic purpose, by a permission should be granted for any commercial purpose. Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantia