A two stage hybrid model for image encryption and compression to enhance security and efficiency

Image information transmission is always a challenge for public network because of its larger size and visual contents. To provide the secure and efficient transmission, some cryptographic and compression based approaches are suggested by the researchers. One of such combined approach is suggested in this work. The work has provided a dictionary based approach for image compression and a Milline Transformation based Fourier approach is defined for image encoding. The cryptography approach defined in this work is based on the phase adaptive variation and transformation. The results are here obtained in terms of MSE and PSNR values. The approach is tested on real time images and the obtained results are satisfactory in terms of accuracy parameters.).