Progressive transmission of vector-quantized images with security and fault-tolerance

Authors:
Shang-Kuan Chen;Ja-Chen Lin
Affiliations:
Department of Computer Science, National Chiao Tung University, Hsinchu, Taiwan, R. O. C.;Department of Computer Science, National Chiao Tung University, Hsinchu, Taiwan, R. O. C.
Venue:
SIP'06 Proceedings of the 5th WSEAS international conference on Signal processing
Year:
2006

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Abstract

The proposed method is an ((r1, ... rk), n)-threshold sharing system: n shares are created by the sharing system to replace the index file of a given quantized image. Security is achieved through the fact that interceptors cannot view the image if they intercept less than r1 shares. Fault-tolerance is also obtained because the VQ version of the image can be fully recovered using any rk shares. Each share is k / (r1 + r2 + ... + rk) times smaller than the index file. The VQ image can be recovered in a progressive manner, as long as the number of received shares reaches some preset threshold values.