前后景分离高斯操作，使用c++实现， 亲测可用，需要搭环景-Before and after the separation of Gaussian operation, the use of c++ implementation, Pro test available, need to take the King

用于计算图片距离操作，使用c++实现， 亲测可用，需要搭环景-Before and after the separation of Gaussian operation, the use of c++ implementation, Pro test available, need to take the King