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A semi-fragile watermarking algorithm for authenticating 2D engineering graphics based on log-polar transformation

conference contribution
posted on 2010-12-01, 00:00 authored by F Peng, R S Guo, Chang-Tsun LiChang-Tsun Li, M Long
A semi-fragile watermarking algorithm for authenticating 2D engineering graphics based on log-polar coordinates mapping is proposed. Firstly, the coordinates of vertices of entities are mapped to the log-polar coordinate system to obtain the invariance of translation, scaling and rotation. Then the watermark is embedded in the mantissa of the real-valued log-polar coordinates via bit substitution. Theoretical analysis and experimental results show that the proposed algorithm is not only robust against incidental operations such as rotation, translation and scaling, but can also detect and locate malicious attacks such as entity modification, entity addition/deletion. © Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering 2010.

History

Volume

41 LNICST

Pagination

11 - 18

ISSN

1867-8211

ISBN-13

9783642115295

ISBN-10

3642115292

Publication classification

E1.1 Full written paper - refereed

Title of proceedings

Lecture Notes of the Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering