- No events scheduled for October 30, 2022.
- No events scheduled for November 1, 2022.
- No events scheduled for November 2, 2022.
Arc Fault Technology
Room: Meyer room , Bldg: University of Dayton Research Institute, Curran Place, 1700 South Patterson Blvd, Dayton, Ohio, United States, 45469Weekly “Inverted Conference” Seminar in Remote Sensing & Communication: European Incoherent Scatter (EISCAT) radar system
Virtual: https://events.vtools.ieee.org/m/330937- No events scheduled for November 5, 2022.
Week of Events
Tech Talk: Scene Motion Detection in Imagery with Anisoplanatic Optical Turbulence
Tech Talk: Scene Motion Detection in Imagery with Anisoplanatic Optical Turbulence
In long range imaging applications, anisoplanatic atmospheric optical turbulence imparts spatially- and temporally-varying blur and geometric distortions in imagery. The ability to distinguish true scene motion from turbulence warping is important for many image processing and analysis tasks. We present two novel scene-motion detection algorithms specifically designed to operate in the presence of anisoplanatic optical turbulence. The first method is based on modeling background intensity fluctuations with a Gaussian mixture model (GMM). The GMM parameters are formed using knowledge of the theoretical turbulence tilt variance statistics derived from the Fried parameter or refractive index structure function. Thus, this new method is referred to as the Tilt Variance GMM (TV-GMM) algorithm. While most prior intensity methods use empirical temporal data to estimate a background model, this approach is based on the theoretical atmospheric tilt variance statistics. This technique effectively avoids contamination in the background statistics when true scene motion is present. TV-GMM also considers the application of global image registration as a preprocessing step to improve performance by employing the recently developed residual tilt variance analysis that accounts for image registration. Rather than forming its statistical model on the (optionally registered) input imagery directly, the second method uses a turbulence simulator. Multiple realizations of atmospheric turbulence are applied to a single prototype background image to create a non-contaminated image stack of the scene background. To incorporate the spatial relationship between neighboring pixels, each pixel's intensity is treated as an independent variable of a single Gaussian distribution. Although full anisoplanatic turbulence simulators are available, alternative approaches are sufficient provided that the anisoplanatic warping is accurate. In this work, a warping simulator based on tilt field statistics is used to provide a fast and reasonable approximation. Because this second method uses a warping simulator, it is referred to as the Warping Simulator Gaussian Model (WS-GM) algorithm. Both quantitative and qualitative performance analyses are conducted, and the proposed methods are compared against several state-of-the art algorithms using both synthetic and real-world data sets. The three synthetic image datasets are generated with an anisoplanatic numerical wave-propagation simulator that enables per-pixel motion truth. Both TV-GMM and WS-GM outperform the benchmark methods across all turbulence profiles used in this study. Speaker(s): Dr. Richard L. Van Hook, Agenda: 12:00-12:05: Introduction 12:05-12:35: Technical Presentation by Dr. Van Hook 12:35-12:45: Q&A 12:45-1:00: Additional time, if needed. Virtual: https://events.vtools.ieee.org/m/328113
Arc Fault Technology
Arc Fault Technology
Where: University of Dayton Research Institute, Curran Place – Meyer room (DJC PLACE N1650 MEYER ROOM ) Meyer room is close to north side of the parking lot upon entering Curran Place. Please enter through the north side of bldg and the Meyer room is on the left side of the hallway Speaker(s): Dennis Grosjean, Room: Meyer room , Bldg: University of Dayton Research Institute, Curran Place, 1700 South Patterson Blvd, Dayton, Ohio, United States, 45469
Weekly “Inverted Conference” Seminar in Remote Sensing & Communication: European Incoherent Scatter (EISCAT) radar system
Weekly “Inverted Conference” Seminar in Remote Sensing & Communication: European Incoherent Scatter (EISCAT) radar system
EISCAT, the European Incoherent SCATter radar system, is a multi-site incoherent scatter radar (ISR) system, originally planned for studies of the auroral ionosphere and located in the auroral zone in northern Finland, Norway and Sweden. Thanks to its ability to provide spatially and temporally resolved measurements of plasma parameters (plasma density, ion and electron temperatures, ion mass and bulk velocities) throughout the ionosphere, from the D layer to the topside ionosphere, incoherent scatter is a powerful ground-based tool for ionosphere and upper atmosphere studies. Major attention is paid to the ionospheric heating facility, “Heating,” next to the Tromsø, Norway, EISCAT facility to study the auroral region and provide new discoveries in plasma physics and ionospheric and atmospheric science to this day. Heating will continue operating along with the new generation of incoherent scatter radar, called EISCAT-3D, when it is commissioned in the near future. Co-sponsored by: Wright-Patt Multi-Intelligence Development Consortium (WPMDC), The DOD & DOE Communities Speaker(s): Ray Wasky, Agenda: EISCAT, the European Incoherent SCATter radar system, is a multi-site incoherent scatter radar (ISR) system, originally planned for studies of the auroral ionosphere and located in the auroral zone in northern Finland, Norway and Sweden. Thanks to its ability to provide spatially and temporally resolved measurements of plasma parameters (plasma density, ion and electron temperatures, ion mass and bulk velocities) throughout the ionosphere, from the D layer to the topside ionosphere, incoherent scatter is a powerful ground-based tool for ionosphere and upper atmosphere studies. Major attention is paid to the ionospheric heating facility, “Heating,” next to the Tromsø, Norway, EISCAT facility to study the auroral region and provide new discoveries in plasma physics and ionospheric and atmospheric science to this day. Heating will continue operating along with the new generation of incoherent scatter radar, called EISCAT-3D, when it is commissioned in the near future. Virtual: https://events.vtools.ieee.org/m/330937