Development Of A Scalable Coding For The Encryption Of Images Using Block Truncation Code

Abstract

In today's technology, especially in Lossy Compression image reconstruction which is identical to the original image transmitted is highly unattainable, protection of digital data between buyer and seller especially from intruders and hackers which requires encryption and also to save space and increase speedy transmission which requires image compression has arisen as an important factor of research. This paper proposes a most efficient way of encrypting, compressing and recovering the original image at the receiver side with high PSNR value. The input image is encrypted by using the pseudo random number and compressed using Block Truncation Coding(BTC). The images are transmitted more securely using pseudo random number, which acts as a secret key and it is shared between sender and receiver. The original gray level pixel value is compressed using Block Truncation Coding(BTC). The encrypted image is obtained by adding compressed BTC pixel value with pseudo random number value and then transmitted. At the receiver side, the decryption process is done to recover the compressed pixel value and original image is reconstructed using BTC.