The Experts below are selected from a list of 240867 Experts worldwide ranked by ideXlab platform
Teddy Furon - One of the best experts on this subject based on the ideXlab platform.
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Some theoretical aspects of watermarking Detection
2017Co-Authors: Teddy Furon, Julie Josse, Sandrine Le SquinAbstract:This paper considers watermarking Detection, also known as zero-bit watermarking. A watermark, carrying no hidden message, is inserted in content. The watermark detector checks for the presence of this particular weak signal in content. The paper aims at looking to this problem from a classical Detection theory point of view, but with side information enabled at the embedding side. This means that the watermarking signal is a Function of the host content. Our study is twofold. The first issue is to design the best embedding Function for a given Detection Function (a Neyman-Pearson detector structure is assumed). The second issue is to find the best Detection Function for a given embedding Function. This yields two conditions, which are mixed into one ‘fundamental' differential equation. Solutions to this equation are optimal in these two senses. Interestingly, there are other solutions than the regular quantization index modulation scheme. The JANIS scheme, for instance, invented in a heuristic manner several years ago, is justified as it is one of these solutions.
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A constructive and unifying framework for zero-bit watermarking
IEEE Transactions on Information Forensics and Security, 2007Co-Authors: Teddy FuronAbstract:In the watermark Detection scenario, also known as zero-bit watermarking, a watermark, carrying no hidden message, is inserted in content. The watermark detector checks for the presence of this particular weak signal in content. The article looks at this problem from a classical Detection theory point of view, but with side information enabled at the embedding side. This means that the watermark signal is a Function of the host content. Our study is twofold. The first step is to design the best embedding Function for a given Detection Function, and the best Detection Function for a given embedding Function. This yields two conditions, which are mixed into one 'fundamental' partial differential equation. It appears that many famous watermarking schemes are indeed solution to this 'fundamental' equation. This study thus gives birth to a constructive framework unifying solutions, so far perceived as very different.
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Hermite Polynomials as Provably Good Functions to Watermark White Gaussian Hosts
2006Co-Authors: Teddy FuronAbstract:In the watermark Detection scenario, also known as zero-bit watermarking, a watermark, carrying no hidden message, is inserted in content. The watermark detector checks for the presence of this particular weak signal in content. The article looks at this problem from a classical Detection theory point of view, but with side information enabled at the embedding side: the watermark signal is a Function of the host content. Our study is twofold. The first issue is to design the best embedding Function for a given Detection Function (a Neyman-Pearson detector structure is assumed). The second issue is to find the best Detection Function for a given embedding Function. This yields two conditions, which are mixed into one 'fundamental' partial differential equation. Solutions of this fundamental equation are heavily dependent on the probability distribution Function of the host signals. This conference paper is an extract of~\cite{Furon2006:A-constructive}, where we only look at white gaussian hosts. This gives birth to polynomials solutions known as Hermite polynomial, whose extension is the JANIS watermarking scheme, invented heuristically some years ago.
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Watermark detectors based on nth order statistics
Applications of Digital Image Processing XXV, 2002Co-Authors: Teddy Furon, Guenole C. M. Silvestre, Neil HurleyAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of non-linear Functions based on n/sup th /-order statistics. Used with a side-informed embedder, its performance is much better than the classical direct sequence spread spectrum method.
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JANIS: Just Another n-order Side-Informed Watermarking Scheme
Proceedings. International Conference on Image Processing, 2002Co-Authors: Teddy Furon, Neil Hurley, Benoît Macq, Guénolé SilvestreAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of nonlinear Functions named JANIS. Used with a side-informed embedder, its performance is much better than the classical spread spectrum method.
Tibor Berceli - One of the best experts on this subject based on the ideXlab platform.
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Semiconductor optical amplifier for Detection Function in subcarrier multiplexed systems
2008 10th Anniversary International Conference on Transparent Optical Networks, 2008Co-Authors: Eszter Udvary, Tibor BerceliAbstract:The paper demonstrates that in broad-band networks in-line semiconductor optical amplifiers that provides system gain can also be used as simultaneous transceiver. The SOA branching stages for bus configuration are studied and presented. We have made a small signal approximation using an equivalent circuit based the rate equations for laser amplifiers used for Detection. The theory enables to explain the Detection Functionality, the optimal working state of the multiFunctional SOA and analyses noise properties. The measurements support the calculations. So the SOA-transceivers are potentially useful in subcarrier multiplexed access system.
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Semiconductor Optical Amplifier for Detection Function in Radio Over Fiber Systems
Journal of Lightwave Technology, 2008Co-Authors: Eszter Udvary, Tibor BerceliAbstract:This paper demonstrates that in broadband networks in-line semiconductor optical amplifiers (SOAs) beside providing system gain can also be used as simultaneous transceivers. The SOA branching stages are studied and presented for bus configuration. Using a steady-state model, we have made a small-signal approximation applying an equivalent circuit for Detection based on the rate equations. The theory enables us to explain the Detection Functionality, the optimal working state of the multiFunctional SOA, and to analyze noise properties. The measurements support the calculations. So the SOA-transceivers are potentially useful in subcarrier multiplexed access systems.
Eszter Udvary - One of the best experts on this subject based on the ideXlab platform.
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Semiconductor optical amplifier for Detection Function in subcarrier multiplexed systems
2008 10th Anniversary International Conference on Transparent Optical Networks, 2008Co-Authors: Eszter Udvary, Tibor BerceliAbstract:The paper demonstrates that in broad-band networks in-line semiconductor optical amplifiers that provides system gain can also be used as simultaneous transceiver. The SOA branching stages for bus configuration are studied and presented. We have made a small signal approximation using an equivalent circuit based the rate equations for laser amplifiers used for Detection. The theory enables to explain the Detection Functionality, the optimal working state of the multiFunctional SOA and analyses noise properties. The measurements support the calculations. So the SOA-transceivers are potentially useful in subcarrier multiplexed access system.
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Semiconductor Optical Amplifier for Detection Function in Radio Over Fiber Systems
Journal of Lightwave Technology, 2008Co-Authors: Eszter Udvary, Tibor BerceliAbstract:This paper demonstrates that in broadband networks in-line semiconductor optical amplifiers (SOAs) beside providing system gain can also be used as simultaneous transceivers. The SOA branching stages are studied and presented for bus configuration. Using a steady-state model, we have made a small-signal approximation applying an equivalent circuit for Detection based on the rate equations. The theory enables us to explain the Detection Functionality, the optimal working state of the multiFunctional SOA, and to analyze noise properties. The measurements support the calculations. So the SOA-transceivers are potentially useful in subcarrier multiplexed access systems.
Neil Hurley - One of the best experts on this subject based on the ideXlab platform.
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Watermark detectors based on nth order statistics
Applications of Digital Image Processing XXV, 2002Co-Authors: Teddy Furon, Guenole C. M. Silvestre, Neil HurleyAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of non-linear Functions based on n/sup th /-order statistics. Used with a side-informed embedder, its performance is much better than the classical direct sequence spread spectrum method.
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JANIS: Just Another n-order Side-Informed Watermarking Scheme
Proceedings. International Conference on Image Processing, 2002Co-Authors: Teddy Furon, Neil Hurley, Benoît Macq, Guénolé SilvestreAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of nonlinear Functions named JANIS. Used with a side-informed embedder, its performance is much better than the classical spread spectrum method.
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ICIP (2) - JANIS: Just Another n-order Side-Informed Watermarking Scheme
Proceedings. International Conference on Image Processing, 1Co-Authors: Teddy Furon, Neil Hurley, Benoît Macq, Guenole C. M. SilvestreAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of nonlinear Functions named JANIS. Used with a side-informed embedder, its performance is much better than the classical spread spectrum method.
Guenole C. M. Silvestre - One of the best experts on this subject based on the ideXlab platform.
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Watermark detectors based on nth order statistics
Applications of Digital Image Processing XXV, 2002Co-Authors: Teddy Furon, Guenole C. M. Silvestre, Neil HurleyAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of non-linear Functions based on n/sup th /-order statistics. Used with a side-informed embedder, its performance is much better than the classical direct sequence spread spectrum method.
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ICIP (2) - JANIS: Just Another n-order Side-Informed Watermarking Scheme
Proceedings. International Conference on Image Processing, 1Co-Authors: Teddy Furon, Neil Hurley, Benoît Macq, Guenole C. M. SilvestreAbstract:This paper deals with some Detection issues of watermark signals. We propose an easy way to implement an informed watermarking embedder whatever the Detection Function. This method shows that a linear Detection Function is not suitable for side information. This is the reason why we build a family of nonlinear Functions named JANIS. Used with a side-informed embedder, its performance is much better than the classical spread spectrum method.