Results 171 to 180 of about 1,461 (222)

A novel fragile watermarking technique

2004 IEEE International Conference on Multimedia and Expo (ICME) (IEEE Cat. No.04TH8763), 2005
Several fragile watermarking techniques cannot detect vector quantization (VQ) attacks; the block-based approach, for example. Celik et al. (IEEE Trans. Image Processing, vol. 11, no. 6, pp. 585-595, 2002) proposed a hierarchical watermarking approach to reveal the VQ attacks. In order to improve the hierarchical watermarking approach, we present a new
Frank Y. Shih, Yi-Ta Wu
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An Improved Fragile Halftone Watermark Method

Sixth International Conference on Intelligent Systems Design and Applications, 2006
Authentication watermarking is a hidden data inserted into an image, in order to detect alterations. This paper introduces a technique of fragile halftone watermark towards static images which is not good enough in the aspect of visual effect. Aiming at this, this paper brings out two ways to improve: evaluate all of the reversible pixels in the image ...
Ruiguo Yu, Pilian He, Xinrong Zhang, Gaofeng Bai   +3 more
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An Effective Fragile Document Watermarking Technique

2008 International Symposium on Electronic Commerce and Security, 2008
Some work is done to improve embedding capacity and locate tampered regions base on the prior research of fragile document watermark in this paper. And an effective fragile document watermarking algorithm is proposed. The wet paper code which adjusts the number of embedding watermark bits dynamically and takes full advantage of turnover pixels is used ...
Jiaxin Yu, Xinsheng Wang, Jianfei Li, Xu Nan   +3 more
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New fragile authentication watermark for images

Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101), 2002
We propose a new fragile watermark for image authentication. Based on the Yeung-Mintzer (see Proc. ICIP'97, Santa Barbara, California, 1997) scheme, the new watermark does not have certain security gaps common to many previously proposed fragile watermarks. A block cipher is used instead of binary look-up tables.
Jiri Fridrich, Miroslav Goljan, Arnold C. Baldoza   +2 more
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Reversible Semi-Fragile Authentication Watermark

Multimedia and Expo, 2007 IEEE International Conference on, 2007
Reversible semi-fragile authentication watermark (RSAW) is required in an integrated and powerful authentication system. An effective RSAW scheme should have the desirable features: tamper detection and localization, good perceptual invisibility, detection without requiring explicit knowledge of the original image, robustness against lossy compression,
Xiaoping Liang, Weizhao Liang, Wen Zhang
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Fragile watermarking of three-dimensional objects

Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269), 2002
There have been many works on watermarking of 2D images and video. However, watermarking of three-dimensional (3D) objects has received little attentions. We introduce and investigate the watermarking of three-dimensional (3D) objects as compared to 2D images, study the watermarking of objects represented by polygonal models, and propose a new fragile ...
Minerva M. Yeung, Boon-Lock Yeo
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Genetic algorithm for fragile audio watermarking

Telecommunication Systems, 2014
A novel genetic-concept-based algorithm is proposed for fragile audio watermarking to reduce the distortion of least significant bits substitution and consequently improve the peak signal-to-noise ratio (PSNR) and increase the payload of results. The result of testing shows that in comparison with ordinary substitution techniques and other presented ...
Mazdak Zamani, Azizah Bt Abdul Manaf
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A Fragile Watermarking Scheme for Medical Image

2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005
The infrastructure to deploy security standards is often lacking during modern telemedicine. As a branch of watermarking technique, the fragile watermarking provides us a good solution to the authentication for telemedicine. A fragile watermarking algorithm based on least significant bit (LSB), hash function and chaotic sequence is presented in this ...
Wang, Gang, Rao, Ni-Ni
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Semi-fragile watermark for sensor data

International Journal of Internet Protocol Technology, 2011
This paper proposes a novel semi-fragile watermarking technique for sensor data. The proposed watermarking technique embeds the secret watermark in the order of the data readings rather than the data values themselves, thus, does not cause distortion to the transmitted data values. Transmitted data readings are organised in groups of fixed length.
Ibrahim Kamel, Osama AlKoky
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Fragile logo watermarking for public authentication

2008 IEEE International Conference on Acoustics, Speech and Signal Processing, 2008
A new fragile logo watermarking scheme is proposed for public authentication and integrity verification of images. The security of the proposed block-wise scheme relies on a public encryption algorithm and a hash function. The encoding and decoding methods can provide public detection capabilities even in the absence of the image indices and the ...
Bravo, S., Gan, Lu, Nandi, A.K., Aburdene, Maurice   +3 more
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