raid 6 的分块原理，和冗余校验，很好的防止节点失效-raid 6 sub-block principle, and the redundancy check, very good to prevent the node failure

以块×块的方式获取图像,解决了现有的CS方法中可压缩采样算子所需存储较大的问题-Way to block × block access to images, the CS method to solve the existing sampling operator for compressible large memory requirements and issues