A rectification method for RST invariant digital image watermarking

Author

Liu, Yan ; Zhao, Jiying

Author_Institution

Sch. of Inf. Technol. & Eng., Univ. of Ottawa, Ont., Canada

Volume

1

fYear

2004

Firstpage

527

Abstract

Based on the log-polar mapping (LPM) and phase-only filtering method, this paper proposes a rectification method that can be used by any image watermarking algorithm to provide robustness against rotation, scaling and translation (RST) transformation. We obtain the RST parameters by calculating the cross-correlation between a template and the magnitude of the image in the corresponding domains. We compare the filter performance by three criteria. The detection accuracy for rotation and scaling is also presented.

Keywords

correlation methods; watermarking; LPM; RST detection accuracy; RST invariant watermarking; RST robustness; digital image watermarking; geometric transform parameters; geometrically transformed image; image magnitude/template cross-correlation; log-polar mapping; phase-only filtering method; rotation transformation; scaling transformation; translation transformation; watermarking rectification method; AWGN; Digital images; Digital signal processing; Filtering; Fourier transforms; Information technology; Matched filters; Robustness; Signal processing algorithms; Watermarking;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Computer Engineering, 2004. Canadian Conference on

ISSN

0840-7789

Print_ISBN

0-7803-8253-6

Type

conf

DOI

10.1109/CCECE.2004.1345085

Filename

1345085