本文提出了一种滤波源码来简化图像抠图中的一个大型稀疏矩阵算法，从而优化了算法，提高了效率。-This paper presents a filter in the source code to simplify the image matting, a large sparse matrix algorithm, to optimize the algorithm and improve efficiency.

The missing code with resources on http://www.alphamatting.com, matlab implementation for [1] A. Levin D. Lischinski and Y. Weiss. A Closed Form Solution to Natural Image Matting.