Results 91 to 100 of about 1,461 (222)
A novel fragile watermarking technique
, 2004 Several fragile watermarking techniques cannot detect vector quantization (VQ) attacks; the block-based approach, for example. Celik et al. proposed a hierarchical watermarking approach to reveal the VQ attacks.
Wu, Yi Ta, Shih, Frank Y.
core
A new robust-fragile double image watermarking algorithm
, 2009 Xie and Shen [1] improved Barni’s basic pixelwise masking model and proposed a more robust wavelet-based watermarking algorithm against attacks including filtering, noise addition and compression.
Hong Shen, Bo Chen, Chen, B., Shen, H.
core +1 more source
Anonymous Authorship Control for User-Generated Content [PDF]
Journal of Systemics, Cybernetics and Informatics, 2007 User-Generated Content (UGC) is opening up new large market in content services, and more and more people are visiting web sites to share and enjoy UGCs. These trends make many authors to move into online.
Suk-Bong LEE +5 more
doaj
A transparent semi-fragile watermarking scheme for 3D models
, 2010 碩士我們的研究主要是在無遠弗屆的網路上利用semi-fragile watermarking來確保3D models的完整性。浮水印是以3D model本身的資訊及種子數（如使用者的合法註冊號碼）產生的亂數所組成，不需使用額外的資訊。驗證浮水印時只要以原種子數利用簡單的數學運算便可以評斷models的完整性。我們所提的方法可以抵擋放大、縮小、平移等常見的3D models處理，也可以抵擋點順序重新排序等攻擊。嵌入方法對3D models外型的影響非常小，因此本方法適用於精密機具或醫學的3D models。
陳瑀穎; Chen, Yu-ying
core
Alpha Channel Fragile Watermarking for Color Image Integrity Protection
Journal of Imaging, 2017 This paper presents a fragile watermarking algorithm`m for the protection of the integrity of color images with alpha channel. The system is able to identify modified areas with very high probability, even with small color or transparency changes.
Barbara Bonafè +3 more
doaj +1 more source
Fragile watermarking techniques for image authentication
, 2009 Techniques to establish the authenticity and integrity of digital images are becoming increasly essential over the Intermet. The authentication algorithm should distinguish malicious manipulations from the original watermarked image. Fragile watermarking
De Santis, Michele
core
Semi-Fragile Zernike Moment-Based Image Watermarking for Authentication
EURASIP Journal on Advances in Signal Processing, 2010 We propose a content-based semi-fragile watermarking algorithm for image authentication. In content-based watermarking scheme for authentication, one of the most challenging issues is to define a computable feature vector that can capture the major ...
Yao Xinzhi, Liu Hongmei, Huang Jiwu
doaj
Multiscale Fragile Watermarking Based on the Gaussian Mixture Model
, 2008 —In this paper, a new multiscale fragile watermarking scheme based on the Gaussian mixture model (GMM) is presented. First, a GMM is developed to describe the statistical characteristics of images in the wavelet domain and an expectation–maximization ...
core
Fragile watermarking tamper detection via bilinear fuzzy relation equations
, 2019 We present a fragile color image watermarking based on the greatest solution of a bilinear fuzzy relation equation. The original image is coded with fuzzy transforms and divided in sub-images of sizes 2 × 2 called blocks.
ferdinando di martino, salvatore sessa
core +1 more source
Chaos-based scramble self-embedding watermarking algorithm
Tongxin xuebao, 2006 A chaos-based scramble self-embedding watermarking algorithm was proposed to locate tamper block on the wa- termarked images and improve security of the existing self-embedding fragile watermarking algorithms that could not effec- tively locate tamper ...
HE Hong-jie, ZHANG Jia-shu
doaj +2 more sources