得到如下样式的二维数组 *zigzag数组（JPEG编码取像素数据的排列顺序） * 0, 1, 5, 6,14,15,27,28, * 2, 4, 7,13,16,2 9,42, * 3, 8,12,17,25,30,41,43, * 9,11,18,24,31,40,44,53, * 10,19,23,32,39,45,52,54, * 20,22,33,38,46,51,55,60, * 21,34,37,47,50,56,59,61, * 35,36,4