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Authors: John N. Ellinas 1 and Dimitrios E. Manolakis 2

Affiliations: 1 Technological Education Institute of Piraeus, Greece ; 2 Alexander Technological Education Institute of Thessaloniki, Greece

Keyword(s): Image watermarking, wavelet transform, Human Visual System, Contrast Sensitivity Function.

Related Ontology Subjects/Areas/Topics: Computer Vision, Visualization and Computer Graphics ; Image Formation and Preprocessing ; Image Formation, Acquisition Devices and Sensors

Abstract: The efficiency of an image watermarking technique depends on the preservation of visually significant information. This is attained by embedding the watermark transparently with the maximum possible strength. The current paper presents an approach for still image digital watermarking in which the watermark embedding process employs the wavelet transform and incorporates Human Visual System (HVS) characteristics. The sensitivity of a human observer to contrast with respect to spatial frequency is described by the Contrast Sensitivity Function (CSF).The strength of the watermark within the decomposition subbands, which occupy an interval on the spatial frequencies, is adjusted according to this sensitivity. Moreover, the watermark embedding process is carried over the subband coefficients that lie on edges where distortions are less noticeable. The experimental evaluation of the proposed method shows very good results in terms of robustness and transparency.

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Paper citation in several formats:
N. Ellinas, J. and E. Manolakis, D. (2007). A ROBUST WATERMARKING SCHEME BASED ON EDGE DETECTION AND CONTRAST SENSITIVITY FUNCTION. In Proceedings of the Second International Conference on Computer Vision Theory and Applications (VISIGRAPP 2007) - Volume 1: VISAPP; ISBN 978-972-8865-73-3; ISSN 2184-4321, SciTePress, pages 93-100. DOI: 10.5220/0002047900930100

@conference{visapp07,
author={John {N. Ellinas}. and Dimitrios {E. Manolakis}.},
title={A ROBUST WATERMARKING SCHEME BASED ON EDGE DETECTION AND CONTRAST SENSITIVITY FUNCTION},
booktitle={Proceedings of the Second International Conference on Computer Vision Theory and Applications (VISIGRAPP 2007) - Volume 1: VISAPP},
year={2007},
pages={93-100},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002047900930100},
isbn={978-972-8865-73-3},
issn={2184-4321},
}

TY - CONF

JO - Proceedings of the Second International Conference on Computer Vision Theory and Applications (VISIGRAPP 2007) - Volume 1: VISAPP
TI - A ROBUST WATERMARKING SCHEME BASED ON EDGE DETECTION AND CONTRAST SENSITIVITY FUNCTION
SN - 978-972-8865-73-3
IS - 2184-4321
AU - N. Ellinas, J.
AU - E. Manolakis, D.
PY - 2007
SP - 93
EP - 100
DO - 10.5220/0002047900930100
PB - SciTePress

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