Encryption-then-Compression System using Haar and Symlet Wavelet Transform

Image compression is the important task for the medical images. Economic and effective image compression techniques are hardly required to minimize the storage volume of medical database in hospitals as well as maintaining the image quality. But the transmission and storage of such a large data could be a tedious job. There are various methods to encrypt the images while transmission. In this research, the proposed system is Encryption then Compression of medical images where Haar and Symlet wavelets can be exploited to efficiently compress the encrypted images. The proposed encryption technique is conducted on the basis of Prediction Error Clustering and Random Permutation to provide the high security at the transmission and the compression of the encrypted image is operated by the Haar and Symlet wavelets. The greater compression efficiency is expected at the compression of the encrypted image with high level of security.