IMG-06 DEVELOPMENT OF AN ELECTROPHOTOGRAPHIC LASER INTENSITY MODULATION MODEL FOR EXTRINSIC SIGNATURE EMBEDDING(Imaging and Printing Technologies II,Technical Program of Oral Presentations)
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概要
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Printer identification based on a printed document can provide forensic information to protect copyright and verify authenticity. In addition to intrinsic features (intrinsic signatures) of the printer, modulating the printing process to embed specific features (extrinsic signatures) will further extend the encoding capacity and decoding accuracy. In this paper, we will demonstrate the feasibility of embedding code sequences in EP halftone images by modulating dot sizes through laser intensity modulation. A communication channel model incorporating the impact of the process modulation parameter, e.g. laser intensity, with a stochastic dot interaction model and scanner modulation transfer function (MTF) to estimate the impact of the modulation on a known halftone pattern and detection performance is developed. This model can be used to exam the embedding and detection algorithm and select embedding parameters without extensive measurements.
- 2009-06-17
著者
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Delp Edward
School Of Electrical And Computer Engineering Purdue University
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Chiu George
School Of Mechanical Engineering Purdue University
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Chiang Pei-ju
School Of Mechanical Engineering Purdue University
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Allebach Jan
School of Electrical and Computer Engineering, Purdue University
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Allebach Jan
School Of Electrical And Computer Engineering Purdue University
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