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Authors: Satoshi Ono ; Kentaro Nakai ; Takeru Maehara and Ryo Ikeda

Affiliation: Kagoshima University, Japan

Keyword(s): Watermark Optimization, Mobile Phone, Two-dimensional Barcode.

Related Ontology Subjects/Areas/Topics: Applications and Services ; Computer Vision, Visualization and Computer Graphics ; Media Watermarking and Security ; Mobile Imaging ; Multimedia Forensics

Abstract: Recently, two-dimensional (2D) barcodes displayed on mobile phones are becoming used for authentification such as airplane boarding pass and online payment. Digital watermarking is promising technology to detect illegal replication or fabrication of such 2D codes. However, due to geometric distortions and/or interferences between patterns of camera sensors and screen pixels, watermark may not be sufficiently extracted from sub-bands which are used when embedding the watermark. This paper proposes a two-stage optimization method for watermark embedding and extracting scheme design. The proposed method discriminates frequency sub-bands between for embedding and extraction, whereas general watermarking schemes extract the watermark from the same subbands as while embedding. To evaluate actual image deterioration by digital-analogue conversion with mobile phone screen and camera, the proposed method uses actual mobile phones to obtain real images of valid and replicated 2D codes. Experim ental result have shown that the proposed two-stage optimization of watermark embedding and extracting schemes improved watermark performance for 2D code replication detection. (More)

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Paper citation in several formats:
Ono, S.; Nakai, K.; Maehara, T. and Ikeda, R. (2015). Watermark Embedding and Extraction Scheme Design by Two-stage Optimization for Illegal Replication Detection of Two-dimensional Barcodes. In Proceedings of the 10th International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2015) ISBN 978-989-758-091-8; ISSN 2184-4321, pages 201-208. DOI: 10.5220/0005358102010208

@conference{visapp15,
author={Satoshi Ono. and Kentaro Nakai. and Takeru Maehara. and Ryo Ikeda.},
title={Watermark Embedding and Extraction Scheme Design by Two-stage Optimization for Illegal Replication Detection of Two-dimensional Barcodes},
booktitle={Proceedings of the 10th International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2015)},
year={2015},
pages={201-208},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005358102010208},
isbn={978-989-758-091-8},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the 10th International Conference on Computer Vision Theory and Applications - Volume 1: VISAPP, (VISIGRAPP 2015)
TI - Watermark Embedding and Extraction Scheme Design by Two-stage Optimization for Illegal Replication Detection of Two-dimensional Barcodes
SN - 978-989-758-091-8
IS - 2184-4321
AU - Ono, S.
AU - Nakai, K.
AU - Maehara, T.
AU - Ikeda, R.
PY - 2015
SP - 201
EP - 208
DO - 10.5220/0005358102010208