Image Tiling Using Columnar Transposition

Abstract

Columnar transposition is a technique commonly used in text encryption to produce cipher text which is a permutation of its original text. In this study, the columnar transposition and pixels reposition is applied to the image to produce a tile structure where each tile segment is a miniature of the original image. The number of tiles produced is n^2, n is the key value which is the number of columns of the transposition matrix. The size of each tile segment is n^(-2) of its original image size. The similarity of each tile was measure using SSIM. From the test result shows that SSIM values vary depending on the given key value.