کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
453542 694961 2010 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Improving the robustness of DCT-based image watermarking against JPEG compression
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Improving the robustness of DCT-based image watermarking against JPEG compression
چکیده انگلیسی

A DCT-based image watermarking technique is proposed in this article. To improve the robustness of watermark against JPEG compression, the most recently proposed techniques embed watermark into the low-frequency components of the image. However, these components hold significant information of the image. Directly replacing the low-frequency components with watermark may introduce undesirable degradation to image quality. To preserve acceptable visual quality for watermarked images, we propose a watermarking technique that adjusts the DCT low-frequency coefficients by the concept of mathematical remainder. Simulation results demonstrate that the embedded watermarks can be almost fully extracted from the JPEG-compressed images with very high compression ratios.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computer Standards & Interfaces - Volume 32, Issues 1–2, January 2010, Pages 54–60
نویسندگان
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