Title :
Dither-modulation data hiding with distortion-compensation: exact performance analysis and an improved detector for JPEG attacks
Author :
Pérez-González, Fernando ; Comesana, P. ; Balado, Felix
Author_Institution :
Dept. Tecnologias de las Comunicaciones, Vigo Univ., Spain
Abstract :
The binary distortion compensated dither-modulation (DC-DM), which can be regarded to as a baseline for quantization-based data-hiding methods, is rigorously analyzed. A novel and accurate procedure for computing the exact probability of bit error is given, as well as an approximation amenable to differentiation which allows to obtain the optimal weights in a newly proposed decoding structure, for significant improvements on performance. The results are particularized for a JPEG compression scenario which allows to show their usefulness. Experimental results validating the proposed theory are presented.
Keywords :
error statistics; image coding; modulation; vector quantisation; watermarking; JPEG compression; binary distortion compensated dither-modulation; bit error probability; data-hiding methods; decoding structure; Additive noise; Bit error rate; Data encapsulation; Decoding; Delta modulation; Detectors; Image analysis; Performance analysis; Quantization; Watermarking;
Conference_Titel :
Image Processing, 2003. ICIP 2003. Proceedings. 2003 International Conference on
Print_ISBN :
0-7803-7750-8
DOI :
10.1109/ICIP.2003.1246727
