Title :
A Modified Feature Based Image Watermarking Scheme in NSCT Domain
Author :
Yang, Liu ; Guo, Baolong ; Lv, Jianmin
Author_Institution :
Sch. of Electro-Mech. Eng., Xidian Univ., Xi´´an, China
Abstract :
In this article, we present a modified robust image watermarking scheme based on the scale-invariant feature transform (SIFT). The watermark is embedded into some local regions extracted from the original image. During embedding, the initial region is divided into some cirque sub-regions with the same area, and each watermark bit is embedded into one sub-region. Besides, it is embedded in the non-subsampled contourlet transform (NSCT) domain to enhance watermark robustness. Experimental results have demonstrated the efficiency of the proposed scheme.
Keywords :
feature extraction; image coding; transforms; watermarking; NSCT domain; SIFT; homocentric cirque subregion; image watermarking scheme; local region feature extraction; nonsubsampled contourlet transform; scale-invariant feature transform; Filtering; Image coding; Image processing; Information security; Protection; Quantization; Robustness; Shape; Signal processing algorithms; Watermarking;
Conference_Titel :
Information Assurance and Security, 2009. IAS '09. Fifth International Conference on
Conference_Location :
Xi´an
Print_ISBN :
978-0-7695-3744-3
DOI :
10.1109/IAS.2009.339
