矩阵对数是矩阵指数的逆运算。
即先用RSA方法加密密钥矩阵，然后用二叉树的遍历产生的不同密钥数据矩阵对数据进行加密。
First, produce key with RSA and construct a binary tree, then traverse the binary tree to produce new keys. And there must be a certain key to encrypt data with all the other encoding methods.
针对数码相机的某一状态，先确定其内部参数矩阵，再通过采集的图像求出外部参数矩阵。
First, intrinsic camera parameter matrix is solved under a state. Then, extrinsic camera parameter matrix of images is solved.
它以矩阵为基本的数值计算单元，对数据进行分析处理、可视化等。
It takes matrix as the basic numerical calculation unit and analyses or visualizes data.
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