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ISCAS
2003
IEEE
97views Hardware» more  ISCAS 2003»
13 years 11 months ago
Watermark re-synchronization using log-polar mapping of image autocorrelation
Many watermarking algorithms embed the watermark into the image as contiguous non-overlapping tiles. This tiling structure forms an implicit synchronization template that can be r...
Adnan M. Alattar, Joel Meyer
PSIVT
2007
Springer
245views Multimedia» more  PSIVT 2007»
14 years 11 days ago
Grayscale Template-Matching Invariant to Rotation, Scale, Translation, Brightness and Contrast
In this paper, we consider the grayscale template-matching problem, invariant to rotation, scale, translation, brightness and contrast, without previous operations that discard gra...
Hae Yong Kim, Sidnei Alves de Araújo
SSWMC
2004
13 years 7 months ago
Hiding correlation-based watermark templates using secret modulation
A possible solution to the difficult problem of geometrical distortion of watermarked images in a blind watermarking scenario is to use a template grid in the autocorrelation func...
Jeroen Lichtenauer, Iwan Setyawan, Reginald L. Lag...
ICPR
2006
IEEE
14 years 7 months ago
Online Learning of Discriminative Patterns from Unlimited Sequences of Candidates
Recent research in object recognition has demonstrated the advantages of representing objects and scenes through localized patterns such as small image templates. In this paper we...
Ilkka Autio, Jussi T. Lindgren
CAIP
2007
Springer
134views Image Analysis» more  CAIP 2007»
13 years 10 months ago
An Efficient Method for Filtering Image-Based Spam E-mail
Spam e-mail with advertisement text embedded in images presents a great challenge to anti-spam filters. In this paper, we present a fast method to detect image-based spam e-mail. U...
Ngo Phuong Nhung, Tu Minh Phuong