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A Robust Image Watermark Algorithm for AD/DA Conversion

Authors:
DongHwan Shin
KyungJun Park
TaeYoon Lee
ChangWon Kim
JongUk Choi

Keywords: Image; Watermark; RST; AD/DA; Circular shift.

Abstract:
This paper is proposing a new watermarking approach which is robust to the AD / DA (from Analog to Digital, or from Digital to Analog) conversion attack, and especially strong against print-scan attack. The new algorithm is designed to be robust for the RST (Rotation, Scaling and Translation) attack and AD/DA attack in order to be used in print-scan applications. The proposed algorithm makes the 12 circular digital signal templates in the frequency domain and shifts them circularly according to the watermark information to be embedded. In order to extract watermark, we use a method to calculate the correlation between the extracted patterns and reference patterns. As a result, our new watermark approach was robust against color print & scan attack on a paper, with 600 dpi color printer, with watermark detection rate of 83.5% in a normal condition room, and 81% in a normal outdoor condition while detection rate was 45% on a monitor display & scan attack case. The difference of detection rates was not large between indoor and outdoor environments.

Pages: 50 to 55

Copyright: Copyright (c) IARIA, 2016

Publication date: February 21, 2016

Published in: conference

ISSN: 2308-4448

ISBN: 978-1-61208-452-7

Location: Lisbon, Portugal

Dates: from February 21, 2016 to February 25, 2016