生物医学图像处理：CT原理与算法（中）

洛书 九宫图,幻方

洛书 九宫图，幻方 8 1 6 7 9 2 5 4 3

洛书 九宫图,幻方 000000 15|000111000 55 000000111 100100100 xxxxxx 15|010010010 15|001001001 00010001 151001010100 x& 稀疏矩阵 p=RX

洛书 九宫图，幻方                                                       =                           9 8 7 6 5 4 3 2 1 0 0 1 0 1 0 1 0 0 1 0 0 0 1 0 0 0 1 0 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 0 1 0 0 0 0 0 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 1 1 1 0 0 0 0 0 0 15 15 15 15 15 15 15 15 x x x x x x x x x p = Rx 稀疏矩阵