Results 131 to 140 of about 1,433 (182)
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SIFT features in semi-fragile video watermarks
SPIE Proceedings, 2010Semi-fragile video watermarking is a technology for detecting manipulations. It provides robustness against content-preserving manipulations as well as sensitivity to content-changing manipulations. To achieve this, robust content-describing features are applied.
Stefan Thiemert, Martin Steinebach
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Speech Authentication by Semi-fragile Watermarking
2005This paper proposes a semi-fragile speech watermarking scheme by quantization of Linear Prediction (LP) parameters, i.e. the inverse sine parameters. The watermark decoding performance is analyzed by modelling the parameters estimation error as Laplace distributed noises.
Bin Yan 0001 +3 more
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Semi-fragile watermarking for gesture authentication
2011 IEEE Conference on Open Systems, 2011Digital watermarking is the process of embedding a piece of information into a digital image. Our proposed method is a semi-fragile watermarking algorithm that can be used for identification systems. The algorithm is using Discrete Wavelet Transform (DWT) and calculates the coefficients of the image to be watermarked.
Woo Chaw Seng +2 more
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New semi-fragile authentication watermarking
Journal of Shanghai University (English Edition), 2002In this paper we propose a semi-fragile watermarking scheme, which can be used for image authentication. Let the original image be performed by 1-level discrete wavelet transformation. An approximate wavelet coefficient matrix of the original image and real-value chaotic sequences are than used to generate the content-based and secure watermark.
Xin Sun, Kai-Xiang Yi, Min-Rui Fei
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New Semi-fragile Authentication Watermarking
2001In this paper we propose a semi-fragile watermarking scheme, which can be used for image authentication. Let the original image be performed by the l-level discrete wavelet transformation. Then the approximate wavelet coefficient matrix of the original image and the real-value chaotic sequences are used to generate the content-based and secure ...
Jiaoying Shi, Kaixiang Yi
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Semi-fragile Watermarking For Text Document Images Authentication
2005 IEEE International Symposium on Circuits and Systems, 2005The proposed novel semi-fragile watermarking method makes use of prioritized noise suppression patterns; it takes into account the smoothness and connectivity in a 5/spl times/5 neighborhood. This is particularly necessary when the original text document image is noisy.
Huijuan Yang, Alex C. Kot, Jun Liu 0069
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A Survey of Semi-fragile Watermarking Authentication
2018In order to improve security and detection of tampered area, in the meantime be able to resist common image processing operation such as: JPEG, Gaussian Filter or other compression techniques, semi-fragile watermarking technology are considered to be the solution.
Chin-Feng Lee, Jau-Ji Shen, Fang-Wei Hsu
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A region-adaptive semi-fragile dual watermarking scheme
Multimedia Tools and Applications, 2014Since existing watermarking schemes usually have only a single function, a region-adaptive semi-fragile dual watermarking scheme is proposed, taking into account both watermark embedding capacity and security. The dual watermarks refer to the robust watermark and the fragile watermark.
Hui Shi +3 more
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Semi-fragile Watermarking Algorithm Based on Image Character
2008 International Conference on Computer Science and Software Engineering, 2008Embedding watermark based on the attacks' characteristic was brought up, and it brought forward the region division algorithm and the double steps embedding method, put forward the characteristic and its representation in DWT transform domain based on visual features model, and brought forward the quantized central limit theorem which was applied to ...
Shengbing Che +3 more
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A Novel Image Authentification Based on Semi-fragile Watermarking
2012 Fifth International Joint Conference on Computational Sciences and Optimization, 2012The research and application of semi-fragile digital watermark is being paid more and more attention now, especially for content authentification. We proposes a novel design for image content authentification based on semi-fragile digital watermark using side information, which combines the modern RSA public key encryption technique with communication ...
Run Zhang, Haibo Wang, Yongbin Wang
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