Scalable Coding of PRNG Encrypted Images
Journal Title: International Journal of Science Engineering and Advance Technology - Year 2013, Vol 1, Issue 5
Abstract
This paper proposes a unique scheme of scalable coding for PRNG encrypted images. In the encryption stage, the original pixel values are masked by a modulo-256 addition with pseudorandom numbers that are resulting from a secret key. After decomposing the encrypted data into a down sampled sub image and some data sets with a multipleresolution construction, an encoder quantizes the sub image and the Hadamard coefficients of each data set to condense the data quantity. Then, the data of quantized sub image and coefficients are observed as a set of bit streams. At the receiver side, while a sub image is decrypted to provide the uneven information of the original content, the quantized coefficients can be used to reconstruct the detailed content with an iteratively updating procedure. Because of the hierarchical coding mechanism, the principal original content with advanced resolution can be reconstructed when more bit streams are received.
Authors and Affiliations
Mr. Y. Sridhar| M.Tech Scholar, Assistant Professor ECE Dept., GITAS, Piridi, Bobbli, Vijayanagaram, Mr. Bighneswar Panda| M.Tech Scholar, Assistant Professor ECE Dept., GITAS, Piridi, Bobbli, Vijayanagaram
Keywords
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