DocumentCode :
2957625
Title :
A Pixel-Based Robust Imagewatermarking System
Author :
Lu, Wenming ; Li, Wanqing ; Safavi-Naini, Rei ; Ogunbona, Philip
Author_Institution :
Wollongong Univ., NSW
fYear :
2006
fDate :
9-12 July 2006
Firstpage :
1565
Lastpage :
1568
Abstract :
Robust image watermarking systems are required to be resistant to geometric attacks in addition to common image processing tasks, such as JPEG compression. However, robustness against geometric attacks, such as rotation, scaling and translation, still remains one of the most challenging research topics in image watermarking. We propose a new pixel-based watermarking system in which a binary logo is embedded, a bit per pixel, in the pixel domain of an image. The encoder of the proposed system is based on a sliding window embedding scheme that applies the local average quantization index modulation (QEM), to achieve geometric attack robustness. The decoder employs a maximum a posteriori (MAP) estimation supported by Markov random field (MRF) model to achieve robust decoding. Additionally, we demonstrate that the proposed scheme is also robust against possible watermark removal due to JPEG compression
Keywords :
Markov processes; binary codes; data compression; data encapsulation; image coding; maximum likelihood decoding; maximum likelihood estimation; quantisation (signal); random codes; telecommunication security; watermarking; JPEG compression; MAP estimation; MRF model; Markov random field; QEM; decoder; embedded binary logo; encoder; geometric attack; image processing; image watermarking system; maximum a posteriori; quantization index modulation; Copyright protection; Decoding; Image coding; Image processing; Pixel; Quantization; Robustness; Signal processing; Transform coding; Watermarking;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Multimedia and Expo, 2006 IEEE International Conference on
Conference_Location :
Toronto, Ont.
Print_ISBN :
1-4244-0366-7
Electronic_ISBN :
1-4244-0367-7
Type :
conf
DOI :
10.1109/ICME.2006.262843
Filename :
4036912
Link To Document :
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