中文说明：应用背景应用在压缩重构过程，该算法可以降低计算复杂度关键技术梯度投影法是基于l1范数最小进行求解的，解决的是一个受约束的二次规划，相对于其他算法，它降低了计算复杂度。
English Description：
Application backgroundIn the process of the compression and reconstruction, the algorithm can reduce the computational complexity.Key TechnologyThe gradient projection method is based on the L1 norm and is solved by a constrained two time programming. It reduces the computational complexity compared with other algorithms..