Results 141 to 150 of about 2,172,252 (181)

A Novel Image Authentification Based on Semi-fragile Watermarking

2012 Fifth International Joint Conference on Computational Sciences and Optimization, 2012
The 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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A wavelet-based semi-fragile watermarking with recovery mechanism

2008 IEEE International Symposium on Circuits and Systems, 2008
This paper studied the wavelet transformation based watermarking tamper detection and recovery scheme. By the property of discrete wavelet transform, we design the semi-fragile watermark from low-frequency band and embedding the watermark into the high-frequency band by the help of human visual system (HVS).
Min-Jen Tsai, Chih-Cheng Chien
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Semi-fragile watermarking scheme for authentication of JPEG images

International Conference on Information Technology: Coding and Computing, 2004. Proceedings. ITCC 2004., 2004
With the increasing popularity of JPEG images, a need arises to devise effective watermarking techniques which consider JPEG compression as an acceptable manipulation. In this paper, we present a semi-fragile watermarking scheme which embeds a watermark in the quantized DCT domain.
Chi Kin Ho, Chang-Tsun Li
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Permutation-Based Semi-Fragile Watermark Scheme

IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences, 2005
Tamper proofing is a crucial problem in the watermarking application. Aiming at the credibility of multimedia, we present a semi-fragile watermark based on the image permutation. Watermarking detection is performed without resorting to the host image and it is only controlled by secrete keys, thus the whole scheme does not have certain security gaps ...
Guorui Feng, Ling-ge Jiang, Chen He 0001
openaire   +3 more sources

Semi-Fragile Watermarking Based on SVM for Image Authentication

Multimedia and Expo, 2007 IEEE International Conference on, 2007
A novel semi-fragile watermarking scheme based on support vector machine (SVM) for image authentication is proposed This scheme first gives a definition of wavelet coefficient direction tree, then the relation model between the root node and its offspring nodes is established using SVM, and further watermark is embedded and extracted based on this ...
Chun-hua Li, He-fei Ling, Zheng-Ding Lu
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Semi-fragile watermarking for image content authentication

Proceedings 7th International Conference on Signal Processing, 2004. Proceedings. ICSP '04. 2004., 2005
In this paper, we propose a quantization-based semi-fragile watermarking algorithm for content authentication. The watermark can be blindly extracted. The formulation of judge threshold is given from the point of probability theory. The tempered areas of watermarked image can be distinguished by the predefined threshold.
null Liu Tong, null Hu Xiangyi, null Dai Yiqi   +2 more
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Semi Fragile Watermarking Based on Wavelet Transform

2001
Watermarking schemes are traditionally classified into two classes, robust watermarking and fragile watermarking. Recently a third type of watermarking called semi fragile watermarking has been proposed. Using semi fragile watermarking a user can determine whether the image is tampered with or not for individual applications.
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Multipurpose Semi-Fragile Watermarking for Image Authentication

Second International Conference on Innovative Computing, Informatio and Control (ICICIC 2007), 2007
In this paper, we propose a new scheme in image authenticating and recovering using block-related index and three types of coefficient-scan strategy. Block-related authenticating information makes the feature codes tolerant in compression processes. Besides, a block-classification method is used for classifying blocks into flat, vertical-detailed or ...
null Tsong-Yi Chen, null Da-Jinn Wang, null Thou-Ho Chen, null Shang-Wei Lin   +3 more
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Semi-fragile digital audio watermarking

2013
The digital information has brought many changes to our life in recent decades. With the rapid growth of digital information, a lot of new techniques are coming into being. Digital watermarking is one of them. This thesis presents a semi-fragile audio watermarking scheme which can be applied to content authentication or copyright verification.
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Semi-fragile watermarking for color image authentication and recovery

The 3rd International Conference on Information Sciences and Interaction Sciences, 2010
In this paper, an efficient semi-fragile watermarking scheme for color image tamper proofing and high-quality recovery is proposed. The scheme is efficient because the validity of image blocks is simply proofed by using a dual-option parity check method and morphological operations.
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