Algorithm of Gray Image Encryption and Compression Based on Knight's Tour
DU Heyao · Video Engineering · 2012
In order to improve the storage and transmission efficiency of confidential images,an algorithm of gray image encryption and compression based on knights tour is proposed.In this algorithm original image is divided into blocks of 8×8,then every block is transformed by DCT to build coefficient blocking matrix.The coefficient blocking matrix is scrambled by the knights tour to get encrypted image,then the encrypted compressed image could be gained after JPEG compression.The experimental results and analysis show that the algorithm has good effects such as the huge key space and the strong sensitivity.It gets higher compression efficiency on premise of some degree of scrambling.