OKTAL-SE publications

By topic

- Electro-Optic (infrared)
- Radio-Frequency (radar)
- Active-Imagery (laser)
- Satellites Navigation (GNSS)
- Company

By year

2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 | 2010 | 2009 | 2008 | 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | 1999 | 1998 |

2006

Automatic 3D virtual scenes modeling for multi sensors simulation

Download PDF SPIE 2006
SEDRIS that stands for Synthetic Environment Data Representation and Interchange Specification is a DoD/DMSO initiative in order to federate and make interoperable 3D mocks up in the frame of virtual reality and simulation. This paper shows an original application of SEDRIS concept for research physical multi sensors simulation, when SEDRIS is more classically known for training simulation. CHORALE (simulated Optronic Acoustic Radar battlefield) is used by the French DGA/DCE (Directorate for Test and Evaluation of the French Ministry of Defense) to perform multi-sensors simulations. CHORALE enables the user to create virtual and realistic multi spectral 3D scenes, and generate the physical signal received by a sensor, typically an IR sensor. In the scope of this CHORALE workshop, French DGA has decided to introduce a SEDRIS based new 3D terrain modeling tool that enables to create automatically 3D databases, directly usable by the physical sensor simulation CHORALE renderers. This AGETIM tool turns geographical source data (including GIS facilities) into meshed geometry enhanced with the sensor physical extensions, fitted to the ray tracing rendering of CHORALE, both for the infrared, electromagnetic and acoustic spectrum. The basic idea is to enhance directly the 2D source level with the physical data, rather than enhancing the 3D meshed level, which is more efficient (rapid database generation) and more reliable (can be generated many times, changing some parameters only). The paper concludes with the last current evolution of AGETIM in the scope mission rehearsal for urban war using sensors. This evolution includes indoor modeling for automatic generation of inner parts of buildings.

Real Time optronic simulation using automatic 3D generated terrain, and validation process

Download PDF ITBMS 2006
The SE-Workbench technology is used to perform multi-sensors simulations on complex 3D synthetic environment. The SE-Workbench enables the user to create virtual and realistic multi spectral 3D scenes, and generate the physical signal received by a sensor, typically infrared (IR), radar (EM) and acoustic (AC) sensors. To evaluate the efficiency of visible and infrared sensors, simulation tools that give a good representation of physical phenomena, are used. This article describes the elements used to prepare data (3D database, materials, atmosphere, ...) for the simulation, and the set of tools (SE-FAST-IR), used in the SE-Workbench-IR for the Real Time simulation in the infrared spectrum. The SE-AGETIM tool turns geographical source data (including GIS facilities) into meshed geometry enhanced with the sensor physical extensions, fitted to the ray tracing rendering of the SE-Workbench and to the Real Time rendering capabilities of the SE-Workbench in infrared. The SE-FAST-IR package allows the compilation and visualization of 3D databases for infrared simulations. It enables one to visualize complex and large synthetic scenes for a wide set of real and pseudo-real time applications. The SE-FAST-IR software automatically computes radiance textures, Open GL light source and fog-law parameters for predefined thermal and atmospheric conditions specified by the user. It is based on the physical model used by the ray-tracing tool of the SE-Workbench, which enables the development of a coherent and powerful validation method.

Real time simulation tools in the CHORALE workshop

Download PDF SPIE 2006
CHORALE (simulated Optronic Acoustic Radar battlefield) is used by the French DGA/DET (Directorate for Evaluation of the French Ministry of Defense) to perform multi-sensors simulations. CHORALE enables the user to create virtual and realistic multi spectral 3D scenes, and generate the physical signal received by a sensor, typically an IR sensor. To evaluate their efficiency in visible and infrared wavelength, simulation tools, that give a good representation of physical phenomena, are used. This article describes the elements used to prepare data (3D database, materials, scenario, ...) for the simulation, and the set of tools (SE-FAST-IR), used in CHORALE for the Real Time simulation in the infrared spectrum. SE-FAST-IR package allows the compilation and visualization of 3D databases for infrared simulations. It enables one to visualize complex and large databases for a wide set of real and pseudo-real time applications. SE-FAST-IR is based on the physical model of the Non Real Time tool of CHORALE workshop. It automatically computes radiance textures, Open GL light source and fog-law parameters for predefined thermal and atmospheric conditions, specified by the user.

top