Results 161 to 170 of about 911 (209)
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A Fragile Watermarking Scheme for Medical Image
2005 IEEE Engineering in Medicine and Biology 27th Annual Conference, 2005The 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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Image authentication by means of fragile CGH watermarking
SPIE Proceedings, 2005In this paper we propose a fragile marking system based on Computer Generated Hologram coding techniques, which is able to detect malicious tampering while tolerating some incidental distortions. A fragile watermark is a mark that is readily altered or destroyed when the host image is modified through a linear or nonlinear transformation.
SCHIRRIPA SPAGNOLO, Giuseppe +2 more
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An improved fragile watermarking algorithm for JPEG images
AEU - International Journal of Electronics and Communications, 2015tIn this paper a new fragile watermarking algorithm is proposed that is built upon the cryptanalysis ofthe CWSA algorithm (Chaotic Watermarking Scheme for Authentication of JPEG Images – Wang et al.[14]). The proposed algorithm preserves the advantages of CWSA, but is robust against cryptanalysis,faster and less perceptible.
Caragata, Daniel +2 more
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An improved block dependent fragile image watermark
2003 International Conference on Multimedia and Expo. ICME '03. Proceedings (Cat. No.03TH8698), 2003Surrounding neighbor blocks dependent fragile watermark scheme has its disadvantages, which couldn't successfully distinguish where the image has been tampered. In this paper, we propose a random block dependant fragile image watermark scheme. Two series, one is generated by this block and its prior block, the other is generated by this block itself ...
Feilong Liu, Yangsheng Wang
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Oblivious fragile watermarking scheme for image authentication
IEEE International Conference on Acoustics Speech and Signal Processing, 2002An efficient fragile watermarking scheme intended for image authentication and integrity verification is proposed in this work. To watermark the underlying image, the gray scale of each pixel is adjusted by an imperceptible quantity according to the consistency between a key-dependent binary watermark bit and the parity of a bit stream converted from ...
Chang-Tsun Li +2 more
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Semi-Fragile Watermarking Based on Image Gradient
2008 International Conference on Computational Intelligence and Security, 2008Semi-fragile watermarking which is robust to given operations and fragile to conscious operations, is a useful authentication technique for digital media. In this paper, a novel semi-fragile image watermarking algorithm that accepts gradient sharpening is proposed.
Jun Xiao 0005, Ying Wang 0030
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Hierarchical Fragile Watermarking Scheme For Image Authentication
Intelligent Automation & Soft Computing, 2011Abstract In this paper, a simple hierarchical fragile watermarking scheme for image authentication is proposed. The important features and parity bits of an image are embedded by modifying the pixel value of the host image. Once an image is tampered by other users or corrupted by transmission, the parity bits and important features can be used to ...
Shinfeng D. Lin, Zong-Lin Yang
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Region of Interest Fragile Watermarking for Image Authentication
First International Multi-Symposiums on Computer and Computational Sciences (IMSCCS'06), 2006Digital watermarking plays an important role in image verification and copyright protection. A watermarking scheme for authenticating ROI (region of interest) of image has been proposed in the paper. To embed the watermark in the interior of ROI, Poisson matting technique is introduced to extract the region of interest of image.
Yiping Chu +3 more
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Fragile Watermarking Scheme for Image Authentication
2012 5th International Conference on Human System Interactions, 2012In this paper, we propose a fragile watermarking scheme in wavelet domain which is sensitive to all kinds of modifications and has the ability to localize the tampered regions. The proposed scheme is a key-dependent, content based and non-deterministic neighborhood-dependent method so that it can resist the well-known attacks including the ...
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Fragile Watermarking for Color Image Authentication
2007 4th International Conference on Electrical and Electronics Engineering, 2007In this paper, we describe a watermarking system for digital color image authentication. This work is an extension of the Wong's work which is based on a Hash function to construct fragile watermarking system. The system is able to detect any change in the image even though it is minimal. Also the system indicates the regions where suffered alterations.
M. Monzoy-Villuendas +3 more
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