Results 121 to 130 of about 2,172,252 (181)

3D Convex Hull-Based Registration Method for Point Cloud Watermark Extraction. [PDF]

Sensors (Basel), 2019
Lipuš B, Žalik B.
europepmc   +1 more source

Integrating Artificial Intelligence into Circular Strategies for Plastic Recycling and Upcycling. [PDF]

Polymers (Basel)
Valle-Bravo AV, González CL, González-Soto RA, Serrano LAG, García JAC, Flores-Huicochea E.   +5 more
europepmc   +1 more source

Applying interest operators in semi-fragile video watermarking

SPIE Proceedings, 2005
In this article we present a semi-fragile watermarking scheme for authenticating intra-coded frames in compressed digital videos. The scheme provides the detection of content-changing manipulations while being moderately robust against content-preserving manipulations. More generally, we mean by content-preserving manipulations those, which are applied
Stefan Thiemert, Hichem Sahbi, Martin Steinebach   +2 more
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Content-Adaptive Semi-Fragile Watermarking for Image Authentication

2007 14th IEEE International Conference on Electronics, Circuits and Systems, 2007
This paper presents a content-adaptive semi-fragile watermarking method for image authentication. The method is based on the semi-fragile watermark of Lin, Podilchuk, and Delp. However, the proposed method adapts the strength of the watermark and the detector type according to the content features of the image. Simulation results show that the proposed
Mohammed E Al-Mualla
exaly   +2 more sources

A Restorable Semi-Fragile Watermarking Combined DCT With Interpolation

Lecture Notes in Computer Science, 2014
In this paper, a semi-fragile watermarking with interpolation method is proposed to improve recovery performance with less recovery watermark capacity. The original image is 2-fold down sampled to reduce the watermark payload and DCT (Discrete Cosine Transformation) is calculated on each 4 × 4 block in the down-sampled image.
Hongjie He, Yaoran Huo
exaly   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

Semi-Fragile Watermarking Based on Image Gradient

2008 International Conference on Computational Intelligence and Security, 2008
Semi-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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A Semi-fragile Watermarking Tolerant of Laplacian Sharpening

2008 International Conference on Computer Science and Software Engineering, 2008
Semi-fragile watermarking technique which aims to discriminate malicious manipulations from admissible manipulations, is drawing many attentions in image authentication. In this paper, a novel semi-fragile image watermarking algorithm that accepts Laplacian sharpening is proposed.
Jun Xiao 0005, Ying Wang 0030
openaire   +1 more source

New Semi-fragile Authentication Watermarking

2001
In 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
openaire   +1 more source