NDLI: Accommodative extractor for QIM-based watermarking schemes

Content Provider	IET Digital Library
Author	Kricha, Zied Kricha, Anis Sakly, Anis
Abstract	In quantisation index modulation-based watermarking methods, each host coefficient is replaced by an adequate quantiser according to the embedded bit. However, after the attack, the distribution of the hosts does not remain the same, resulting in a failure to map coefficients to their correct bits. To maintain a good quality, many authors focused on improving the extraction, rather than playing on the embedding parameters. They used a reference message to define the parameters of the channel model after the attack. However, the available solutions were not effective, whereas the reference message cannot describe the channel alteration due to a shortage of samples, and the complexity of attacks modelling. To overcome these problems, the authors relied on a diversification technique, which allowed to enlarge and vary the samples. Then, based on quantisation embedding rules, they generated an accommodative detection model for each attack. At the extraction phase, the suitable detection model was identified by means of a reference message. To reinforce the security of their scheme, the watermark was initially shuffled, which prevents any unauthorised detection attempt. Both geometric and signal processing attacks were used in the validation of their method. The reduction of bit-error rate with respect to the conventional detection method reached up to 100%.
Starting Page	89
Ending Page	97
Page Count	9
ISSN	17519659
Volume Number	13
e-ISSN	17519667
Issue Number	Issue 1, Jan (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-ipr/13/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2018.5814
Journal	IET Image Processing
Publisher Date	2018-10-11
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Accommodative Detection Model Accommodative Extractor Adequate Quantiser Available Solutions Bit-error Rate Channel Alteration Channel Model Computer Vision And Image Processing Technique Conventional Detection Method Correct Bits Data Security Embedded Bit Embedding Parameter Extraction Phase Geometric Signal Processing Attack Good Quality Host Coefficient Hosts Image And Video Coding Image Coding Image Watermarking Map Coefficient QIM-based Watermarking Scheme Quantisation (signal) Quantisation Embedding Rules Quantisation Index Modulation-based Watermarking Method Reference Message Security of Data Statistics Suitable Detection Model Unauthorised Detection Attempt Watermark Watermarking
Content Type	Text
Resource Type	Article
Subject	Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software

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