The Experts below are selected from a list of 7776 Experts worldwide ranked by ideXlab platform
Paul Debevec - One of the best experts on this subject based on the ideXlab platform.
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Post-Production Facial Performance Relighting Using
2020Co-Authors: Pieter Peers, Naoki Tamura, Wojciech Matusik, Paul DebevecAbstract:We propose a novel Post-Production facial performance relighting system for human actors. Our system uses just a dataset of view-dependent facial appearances with a neutral expression, captured for a static subject using a Light Stage apparatus. For the actual performance, however, a potentially dierent actor is captured under known, but static, illumination. During Post-Production, the reflectance field of the reference dataset actor is transferred onto the dynamic performance, enabling image-based relighting of the entire sequence. Our approach makes Post-Production relighting more practical and could easily be incorporated in a traditional Production pipeline since it does not require additional hardware during principal photography. Additionally, we show that our system is suitable for real-time Post-Production illumination editing.
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Post Production facial performance relighting using reflectance transfer
International Conference on Computer Graphics and Interactive Techniques, 2007Co-Authors: Pieter Peers, Naoki Tamura, Wojciech Matusik, Paul DebevecAbstract:We propose a novel Post-Production facial performance relighting system for human actors. Our system uses just a dataset of view-dependent facial appearances with a neutral expression, captured for a static subject using a Light Stage apparatus. For the actual performance, however, a potentially different actor is captured under known, but static, illumination. During Post-Production, the reflectance field of the reference dataset actor is transferred onto the dynamic performance, enabling image-based relighting of the entire sequence. Our approach makes Post-Production relighting more practical and could easily be incorporated in a traditional Production pipeline since it does not require additional hardware during principal photography. Additionally, we show that our system is suitable for real-time Post-Production illumination editing.
Pieter Peers - One of the best experts on this subject based on the ideXlab platform.
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Post-Production Facial Performance Relighting Using
2020Co-Authors: Pieter Peers, Naoki Tamura, Wojciech Matusik, Paul DebevecAbstract:We propose a novel Post-Production facial performance relighting system for human actors. Our system uses just a dataset of view-dependent facial appearances with a neutral expression, captured for a static subject using a Light Stage apparatus. For the actual performance, however, a potentially dierent actor is captured under known, but static, illumination. During Post-Production, the reflectance field of the reference dataset actor is transferred onto the dynamic performance, enabling image-based relighting of the entire sequence. Our approach makes Post-Production relighting more practical and could easily be incorporated in a traditional Production pipeline since it does not require additional hardware during principal photography. Additionally, we show that our system is suitable for real-time Post-Production illumination editing.
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Post Production facial performance relighting using reflectance transfer
International Conference on Computer Graphics and Interactive Techniques, 2007Co-Authors: Pieter Peers, Naoki Tamura, Wojciech Matusik, Paul DebevecAbstract:We propose a novel Post-Production facial performance relighting system for human actors. Our system uses just a dataset of view-dependent facial appearances with a neutral expression, captured for a static subject using a Light Stage apparatus. For the actual performance, however, a potentially different actor is captured under known, but static, illumination. During Post-Production, the reflectance field of the reference dataset actor is transferred onto the dynamic performance, enabling image-based relighting of the entire sequence. Our approach makes Post-Production relighting more practical and could easily be incorporated in a traditional Production pipeline since it does not require additional hardware during principal photography. Additionally, we show that our system is suitable for real-time Post-Production illumination editing.
Yiorgos Makris - One of the best experts on this subject based on the ideXlab platform.
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Silicon Demonstration of Statistical Post-Production Tuning
2015 IEEE Computer Society Annual Symposium on VLSI, 2015Co-Authors: Yichuan Lu, Nathan Kupp, He Huang, Kiruba Subramani, Yiorgos MakrisAbstract:Towards meeting the continued demand for higher performance in analog/RF ICs, the semiconductor industry has resorted to aggressive design styles. In conjunction with the increased variation of modern processes, aggressive design jeopardizes yield and, by extension, profitability of the design. In an effort to facilitate aggressive high-performance design without compromising Production yield, modern designs incorporate tuning knobs which are used after manufacturing to individually calibrate the performances of each chip, as well as some type of non-volatile memory to store the selected knob settings. In this work, we discuss a statistical Post-Production tuning method, which rapidly selects the appropriate knob positions using low-cost measurements, and we demonstrate it on a tunable Low Noise Amplifier which we designed and fabricated in IBM's 130nm RF CMOS process.
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Post Production performance calibration in analog rf devices
International Test Conference, 2010Co-Authors: Nathan Kupp, He Huang, Petros Drineas, Yiorgos MakrisAbstract:In semiconductor device fabrication, continual demand for high performance, high yield devices has caused designers to look to Post-Production tunable circuits as the next logical step in analog/RF design and test development. These approaches have not yet achieved the maturity necessary for industrial adoption, primarily due to complexity and cost. In this work, we develop a general model which systematically outlines several key observations constraining the complexity of performance calibration in analog/RF devices. Moreover, we develop a detailed cost model permitting direct comparison of performance calibration methods to industry standard specification testing. Our analysis is demonstrated on a tunable RF LNA device simulated in 0.18µm RFCMOS.
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Post-Production performance calibration in analog/RF devices
Proceedings - International Test Conference, 2010Co-Authors: Nathan Kupp, Petros Drineasy, He Huang, Yiorgos MakrisAbstract:In semiconductor device fabrication, continual demand for high performance, high yield devices has caused designers to look to Post-Production tunable circuits as the next logical step in analog/RF design and test development. These approaches have not yet achieved the maturity necessary for industrial adoption, primarily due to complexity and cost. In this work, we develop a general model which systematically outlines several key observations constraining the complexity of performance calibration in analog/RF devices. Moreover, we develop a detailed cost model permitting direct comparison of performance calibration methods to industry standard specification testing. Our analysis is demonstrated on a tunable RF LNA device simulated in 0.18µm RFCMOS.
Juha Varis - One of the best experts on this subject based on the ideXlab platform.
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Feasibility Assessment of a Wood-Plastic Composite Post-Production Process: Cuttability
Procedia Manufacturing, 2020Co-Authors: Amir Toghyani, Sami Matthews, Juha VarisAbstract:Abstract Wood-plastic composites (WPCs) are facing a rapid market growth. Environmental legislation changes in recent years have demanded improving the recycling targets. The Post-Production shaping process allows the utilization of a wide range of recycled composite materials and enables the Production of a diverse set of products, instead of the currently limited shapes and profiles with a uniform cross section. In the novel Post-Production process, the cuttability of extruded WPC material including 45% wood fiber, 50% thermoplastic and 5% of other additives is one of the two key elements in successful Production of the new products presented in this article. In the studied Production process, extrusion is used to produce a pre-determined WPC sheet, which is formed and cut in the Post-Production process to obtain the final product. The press-forming process is used in the second Production stage to form and cut the pre-determined profile shape.
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Cutting Repeatability of an Extruded Wood Plastic Composite in a Post-Production Process
Procedia Manufacturing, 2020Co-Authors: Amir Toghyani, Sami Matthews, Juha VarisAbstract:Abstract Wood-plastic composites (WPCs) as one of the promising materials in manufacturing industries are facing rapid market growth. WPCs are a mixture of thermoplastic or thermosetting plastics and wood fibers. The extruded profiles of WPCs are widely used in different market sectors. A promising novel Post-Production process to utilize WPC materials may lead to even greater market potential in the future by creating products with more complex geometries. In this Production process, cutting and forming as the key elements need to be not only stable but also repeatable. This article evaluates the cutting repeatability of extrusion-based WPC material, including 45% wood fiber, 50% thermoplastic, and 5% other additives press-formed in a Post-Production process. In the studied process, extrusion was selected as the fabrication method in the Production of WPC sheets and the press-forming method was selected for the Post-Production process. In the first stage of experiments, the preliminary cutting process was conducted using a hydraulic press to find the suitable temperature range and other Production parameters needed in successful Production. The statistical process control chart method was used in the second stage of the evaluation process. The test results clearly demonstrate that the selected process has an acceptable cutting repeatability with respect to the effect of temperature in the cutting process.
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Feasibility Assessment of a Wood-Plastic Composite Post-Production Process: Formability
Bioresources, 2016Co-Authors: Amir Toghyani, Sami Matthews, Harri Eskelinen, Timo Kärki, Juha VarisAbstract:Wood-plastic composites (WPCs) – one of a number of promising classes of materials in the manufacturing industries – are experiencing rapid market growth. However, the favorable characteristics of this material and the development of new Production processes and Post-Production processes suggest even greater potential for utilization of WPCs. This paper evaluates the formability of an extruded WPC material comprising nearly 45% wood fiber, 50% thermoplastic, and 5% of other additives in a novel extrusion-based Post-Production process. The press-forming process described in this work is used to form and cut the pre-determined profile shape to obtain the final product. After preliminary tests to determine the suitable temperature range, dimensions, and roughness range for a Post-extrusion hot-pressing process of a sample WPC product, a diverse set of product quality tests were then conducted on pre-heated sheets of WPC material using forming tools attached to a hydraulic press. The forming process had high accuracy with respect to dimensional precision and acceptable repeatability. The forming process also reduced the surface roughness of the material. The test results clearly demonstrated the dependence of final product quality on the quality of the original extruded WPC profiles used, e.g., with respect to the thickness variation of the material.
Wojciech Matusik - One of the best experts on this subject based on the ideXlab platform.
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Post-Production Facial Performance Relighting Using
2020Co-Authors: Pieter Peers, Naoki Tamura, Wojciech Matusik, Paul DebevecAbstract:We propose a novel Post-Production facial performance relighting system for human actors. Our system uses just a dataset of view-dependent facial appearances with a neutral expression, captured for a static subject using a Light Stage apparatus. For the actual performance, however, a potentially dierent actor is captured under known, but static, illumination. During Post-Production, the reflectance field of the reference dataset actor is transferred onto the dynamic performance, enabling image-based relighting of the entire sequence. Our approach makes Post-Production relighting more practical and could easily be incorporated in a traditional Production pipeline since it does not require additional hardware during principal photography. Additionally, we show that our system is suitable for real-time Post-Production illumination editing.
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Post Production facial performance relighting using reflectance transfer
International Conference on Computer Graphics and Interactive Techniques, 2007Co-Authors: Pieter Peers, Naoki Tamura, Wojciech Matusik, Paul DebevecAbstract:We propose a novel Post-Production facial performance relighting system for human actors. Our system uses just a dataset of view-dependent facial appearances with a neutral expression, captured for a static subject using a Light Stage apparatus. For the actual performance, however, a potentially different actor is captured under known, but static, illumination. During Post-Production, the reflectance field of the reference dataset actor is transferred onto the dynamic performance, enabling image-based relighting of the entire sequence. Our approach makes Post-Production relighting more practical and could easily be incorporated in a traditional Production pipeline since it does not require additional hardware during principal photography. Additionally, we show that our system is suitable for real-time Post-Production illumination editing.