zigzagdemo

说明：  在视频处理中经常要用到Zigzag序号及其逆序号，本文提供了一个新的类CZigzag，可以求任意m×n块的Zigzag序号及其逆序号。 由于所求的Zigzag序号及其逆序号为一次性遍历生成，其时间复杂度仅为O（m×n）。
(In video often use to deal with the serial number and its reverse No. Zigzag, the paper provides a new category CZigzag, can seek arbitrary m × n block Zigzag its serial number and its reverse. Zigzag As the demand for its serial number and its reverse traversal generates one-time, its time complexity is only O (m × n).)