DocumentCode :
681438
Title :
Logarithmic Spread-Transform Dither Modulation watermarking Based on Perceptual Model
Author :
Wenbo Wan ; Ju Liu ; Jiande Sun ; XiaoHui Yang ; Xiushan Nie ; Feng Wang
Author_Institution :
Sch. of Inf. Sci. & Eng., Shandong Univ., Jinan, China
fYear :
2013
fDate :
15-18 Sept. 2013
Firstpage :
4522
Lastpage :
4526
Abstract :
Logarithmic Quantization Index Modulation (LQIM) is an important extension of the original quantization-based watermarking method. However, it is well known that it is sensitive to valumetric scaling attack and easy to result in sign error after quantization and attacks. For that, in this paper, we propose a new method, namely Logarithmic Spread-Transform Dither Modulation Based on Perceptual Model (LSTDM-WM). In this regard the host signal is first projected onto a random vector and transformed using a novel Logarithmic Quantization function. Then the transformed signal is quantized regarding the watermark data and the watermarked signal is obtained by applying inverse transform to the quantized signal. The perceptual model is further exploited to adjust the quantization step adaptively for watermark embedding. Experimental results indicate that our proposed scheme overcomes two challenges cited above and has superior performance in comparison with conventional LQIM and former proposed schemes of STDM.
Keywords :
inverse transforms; quantisation (signal); random processes; vectors; watermarking; LQIM; LSTDM-WM; inverse transform; logarithmic quantization function; logarithmic quantization index modulation; logarithmic spread-transform dither modulation based on perceptual model; logarithmic spread-transform dither modulation watermarking; quantization-based watermarking method; quantized signal; random vector; volumetric scaling attack; watermark data; watermark embedding; watermarked signal; Digital Watermarking; LQIM; LSTDM-MW; STDM; Watson´s perceptual model;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Image Processing (ICIP), 2013 20th IEEE International Conference on
Conference_Location :
Melbourne, VIC
Type :
conf
DOI :
10.1109/ICIP.2013.6738931
Filename :
6738931
Link To Document :
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