کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
388319 660921 2012 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
An improved SVD-based watermarking technique for copyright protection
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر هوش مصنوعی
پیش نمایش صفحه اول مقاله
An improved SVD-based watermarking technique for copyright protection
چکیده انگلیسی

The drawbacks of SVD-based image watermarking are false positive, robust and transparency. The former can be overcome by embedding the principal components of the watermark into the host image, the latter is dependent on how much the quantity (i.e., scaling factor) of the principal components is embedded. For the existing methods, the scaling factor is a fixed value; actually, it is image-dependent. Different watermarks need the different scaling factors, although they are embedded in the same host image. In this paper, two methods are proposed to improve the reliability and robustness. To improve the reliability, for the first method, the principal components of the watermark are embedded into the host image in discrete cosine transform (DCT); and for the second method, those are embedded into the host image in discrete wavelets transform (DWT). To improve the robustness, the particle swarm optimization (PSO) is used for finding the suitable scaling factors. The experimental results demonstrate that the performance of the proposed methods outperforms than those of the existing methods.


► To improve the reliability and robustness, DCT, DWT and PSO are used.
► To improve the reliability, the principal components of the watermark are embedded into the host image either in DCT or DWT.
► To improve the robustness, PSO is used for finding the suitable scaling factors.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Expert Systems with Applications - Volume 39, Issue 1, January 2012, Pages 673–689
نویسندگان
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