Image compression and encryption scheme via satellite

摘要

Satellite communication systems are now designed according to an outdated Shannon information theory where all data is transmitted in meaningless bit streams. In this article, a novel noise free digital image communication via satellite has been developed. The proposed scheme is based on fractional compression and a new block cipher cryptosystem based on S-8 substitution boxes transformation. The fractal compression technique is selected to compress the aerial images due to its high compression capability. The fractal image compression of the input aerial image is the first stage in the encoding phase. The fractal compression technique divides the original image into two different block sizes called range and domain blocks. The best match between the range and domain blocks is known as the transformation mapping. All the transformation mappings are recorded as the output-compressed file of the input aerial image.