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دسته بندی:
امنیت - Security
سال انتشار:
2017
عنوان انگلیسی مقاله:
An efficient medical image watermarking scheme based on FDCuT-DCT
ترجمه فارسی عنوان مقاله:
یک تصویر پزشکی کارآمد طرح چاپ سفید(نقشاب) مبتنی بر FDCuT-DCT
منبع:
Sciencedirect - Elsevier - Engineering Science and Technology, an International Journal, Corrected proof. doi:10.1016/j.jestch.2017.06.001
نویسنده:
Rohit Thanki, Surekha Borra, Vedvyas Dwivedi, Komal Borisagar
چکیده انگلیسی:
In this paper, a blind medical image watermarking scheme based on Fast Discrete Curvelet Transform (FDCuT) and Discrete Cosine Transform (DCT) is proposed. FDCuT is applied on the medical image to get different frequency coefficients of its curvelet decomposition. On the high frequency curvelet coeffi- cients of the medical image, block wise DCT is applied to get different frequency coefficients. Then mid band frequency coefficients of the medical image are modified by White Gaussian Noise (WGN) sequences according to watermark bit to get watermarked medical image. At extraction end, blind recov- ery of watermark data is performed by correlation of WGN sequences. The proposed scheme is tested for its effectiveness on various types of medical images such as X-ray, Ultrasound (US), Magnetic Resonant Imaging (MRI) and Computerized Tomography (CT). Result analysis shows that imperceptibility of water- marked medical image is better as PSNR is above 45 dB for all types of the medical images. In addition, the robustness of the scheme is better than an existing scheme for a similar set of medical images in terms of Normalized Correlation (NC). Experimental results show that scheme is robust to geometric attacks, signal processing attacks and JPEG compression attacks. An analysis is also carried out to verify the performance of the proposed scheme to support binary watermarks with different details in it: text and logos. Moreover, the proposed scheme resulted in zero false positive rate when tested on 100 non- watermarked images.© 2017 Karabuk University. Publishing services by Elsevier B.V. This is an open access article under the CCBY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
Keywords:Blind watermarking | Fast Discrete Curvelet Transform (FDCuT) | Medical Image Security | Robustness | Telemedicine | White Gaussian Noise (WGN)
قیمت: رایگان
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