Results 171 to 180 of about 250 (209)
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Experiment of Tamper Detection and Recovery Watermarking in PACS
2010 Second International Conference on Computer Research and Development, 2010Medical images such as x-rays, ultrasounds and MRI (Magnetic Resonance Imaging) plays an important role in helping the physicians to diagnose a disease or body conditions. These images can be tampered with existing image processing tools that is easily available.
Siau-Chuin Liew, Jasni Mohamad Zain
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Digital watermarking method for tamper detection and recovery of JPEG images
2010 International Symposium On Information Theory & Its Applications, 2010Digital watermarking is a technique that embeds additional data into digital contents so that the distortion by embedding them is imperceptible, where the additional data are called watermark. One of the applications of digital watermarking is tamper detection and recovery.
Motoi Iwata +3 more
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MEDICAL IMAGE WATERMARKING FOR AUTHENTICATION, CONFIDENTIALITY, TAMPER DETECTION AND RECOVERY
2019 10th International Conference on Computing, Communication and Networking Technologies (ICCCNT), 2019This paper presents a region based blind medical image watermarking (MIW) scheme for ensuring authenticity, integrity and confidentiality of medical images. Medical image is segmented into region of interest(ROI) and region of non interest (RONI). ROI is watermarked for tamper detection and recovery in the spatial domain.
Priyanka Singh 0003, Ashok Kumar Pradhan
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Semi-fragile watermarking for image tamper localization and self-recovery
Proceedings 2014 IEEE International Conference on Security, Pattern Analysis, and Cybernetics (SPAC), 2014This paper proposes a semi-fragile digital watermarking scheme for image tamper localization and self-recovery. Firstly, the authentication watermark is generated for tampered area localization. After that, for content recovery, the recovery watermark is calculated from high frequency band with redundancy free. Then, for the two type of watermarks, the
Yuhang Li, Ling Du
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An encrypted speech authentication and tampering recovery method based on perceptual hashing
Multimedia Tools and Applications, 2021With the progress of speech retrieval technology in the cloud, it brings a lot of conveniences for speech user. Yet, the inquiry encrypted speech results from the speech retrieval system are faced with some secure issues to settle, such as integrity authentication and tampering recovery.
Qiu-yu Zhang, Deng-hai Zhang, Fu-jiu Xu
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Hierarchical recovery for tampered images based on watermark self-embedding
Displays, 2017Abstract In this paper, we propose a new self-embedding watermarking scheme with hierarchical recovery capability. The binary bits in the adopted MSB layers are scrambled and individually interleaved with different extension ratios according to their importance to image visual quality.
Fang Cao +4 more
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Watermarking-based tamper detection and recovery algorithms for official documents
2011 8th International Conference on Electrical Engineering, Computing Science and Automatic Control, 2011This paper proposes two watermarking-based algorithms for temper detection and recovery of the tampered regions, which can be applied to official documents, such as digitized passports and governmental registrations. In both algorithms, a halftone version of the original grayscale image is used as an approximated version of the host image (image digest)
Luis Rosales-Roldan +3 more
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A Robust Algorithm for Digital Watermarking with Tamper Recovery
Applied Mechanics and Materials, 2013A block-wise and content-based image authentication scheme with location and recovery is presented. In this scheme, the watermark of each block is an encrypted form of its content-feature, which is embedded in another block which selected by an ergodic matrix of a chaotic sequence. The randomicity of selected block can robust the VQ attack.
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A refining localization watermarking for image tamper detection and recovery
2012 IEEE 11th International Conference on Signal Processing, 2012In this paper, we propose an efficient watermarking algorithm for image tamper localization and recovery. To enhance the accuracy of tamper localization, the algorithm contains basic authentication and refining authentication. Basic authentication can locate all blocks that contain the tampered pixels by the basic authentication watermark.
Baotian Cheng, Rongrong Ni, Yao Zhao
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Image Tamper Detection and Recovery Using Dual Watermark
2010 6th International Conference on Wireless Communications Networking and Mobile Computing (WiCOM), 2010A novel dual watermark scheme for image tamper detection and recovery is proposed in this paper. In the proposed watermarking algorithm, we embed the watermark information into the original image using the algorithm of the LSB (Least Significant Bit) and the DWT (Discrete Wavelet Transform).
Qiang Song, Hongbin Zhang
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