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Proceedings Paper

Computer-aided visual model for ensuring video watermarking transparency
Author(s): Jana Dittmann; Anirban Mukherjee; Martin Steinebach
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Paper Abstract

Digital watermarking is a technology for copyright protection and protection against unauthorized access and modification of multimedia material. The most important properties of digital watermarking techniques are robustness, security, imperceptibility/ transparency, complexity, capacity and possibility of verification. Robustness means resistance to 'blind', non-targeted modifications, or common media operations. A transparent watermark causes no artifacts or quality loss. A maximum of robustness cannot be achieved at the same time as a maximum of transparency as a higher robustness requires stronger media modifications. Transparency is based on the properties of the human visual system or the human auditory system. It is an often-neglected part of a watermarking evaluation scheme. We introduce a computer aided visual model based on a visual modulation threshold function which is used to test the degree of transparency of the watermark in watermarked multimedia material using linear system theory. We describe our test environment for the model and show how it is implemented in 5 steps representing the essential parts of the visual model: Sampling, band pass contrast response, oriented response, transducer and distance. The model takes two digital images as the input of the and returns a probability that an observer can distinguish the two pictures.

Paper Details

Date Published: 1 August 2001
PDF: 10 pages
Proc. SPIE 4314, Security and Watermarking of Multimedia Contents III, (1 August 2001); doi: 10.1117/12.435447
Show Author Affiliations
Jana Dittmann, GMD--German National Research Ctr. for Information Technology (Germany)
Anirban Mukherjee, GMD--German National Research Ctr. for Information Technology (Germany)
Martin Steinebach, GMD--German National Research Ctr. for Information Technology (Germany)


Published in SPIE Proceedings Vol. 4314:
Security and Watermarking of Multimedia Contents III
Ping Wah Wong; Edward J. Delp, Editor(s)

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