•  
  •  
 

International Journal of Image Processing and Vision Science

Abstract

When it is desired to transmit redundant data over an insecure and bandwidth-constrained channel, it is customary to first compress the data and then encrypt it. In this paper, we investigate the efficiency of reversing the order of these steps, i.e., first encrypting and then compressing, without compromise for compression efficiency or the informationtheoretic security. A pseudorandom permutation and a linear encoding scheme is used to encrypt an original image, and the encrypted data are efficiently compressed by discarding the excessively rough and fine information of coefficients generated from orthogonal transform. After receiving the compressed data, based on spatial correlation, a receiver can reconstruct the principal content of the original image by iteratively updating the values of coefficients and the linear decoding procedure.

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.