图像的仿射变换，共包括4个文件，全都是matlab文件，分别为affine.m,grad.m,wrap.m,paremetric.m：，对于图像仿射变换以及图像的超分辨率重构非常有帮助。-image affine transformation, including a total of four documents, and all of Matlab documents, affine.m respectively, grad.m, wrap.m, paremetric.m :, for th

该压缩文件是用于现代密码学中的仿射映射的程序，希望对学习现代密码学的同学有用-The compressed file is used in modern cryptography in the affine mapping procedures in the hope of learning useful to students of modern cryptography

Plot Lines in the image and estimate homography and remove affine rect and metric rect. It uses image warping function

Hill Ciphers, Affine cipher and Playfair Cipher