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Orthorectification using a high resolution DS for fusion of data from different sensor systems

Orthorectification using a high resolution DS for fusion of ...

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36th Jahrestagung der Gesellschaft fur Informatik e.V. (GI): Informatik fur Menschen, INFORMATIK 2006

作者： Thiele, Antje Schulz, Karsten Thoennessen, Ulrich Cadari, Erich Research Institute for Optronics and Pattern Recognition Gutleuthausstrasse 1 D 76275 Ettlinge Germany

ISBN: (纸本)9783885791874

The employment of different airborne and spaceborne systems opens the opportunity for an exploitation of complementary as well as supplementary sensor information for many purposes. One of the main future tasks in the field of reconnaissance and surveillance is the fusion of these heterogeneous data. The use of different sensors enables the exploitation and the extraction of information on higher level, supporting a value adding to the reconnaissance chain, which is especially helpful to interpret built up areas in urban terrain. Because of the different imaging properties of the sensor systems, it is necessary to transform the datasets into a common coordinate system. For each imaging device a specific transformation equation system has to be applied depending on the sensor parameters and supplementary metadata. These specific imaging transformations (orthorectification) using a high resolution Digital Surface Model (DSM) are applied to a multisensor data set. An orthorectification method especially for SAR images was developed and applied to airborne SAR data. Results are presented.

关键词： Synthetic aperture radar

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Fusion of heterogeneous multisensor dat

Fusion of heterogeneous multisensor dat

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36th Jahrestagung der Gesellschaft fur Informatik e.V. (GI): Informatik fur Menschen, INFORMATIK 2006

作者： Schulz, Karsten Thiele, Antje Thoennessen, Ulrich Cadario, Erich Research Institute for Optronics and Pattern Recognition Gutleuthausstrasse 1 D 76275 Ettlingen Germany

ISBN: (纸本)9783885791874

One of the main future tasks in the field of reconnaissance and surveillance is the data fusion of heterogeneous systems. For this purpose, sensor data of airborne and spaceborne systems, which acquire the data from the same scene with different spatial and spectral coverage, are used. The employment of different sen-sors offers the opportunity to take benefit of the specific sensor characteristic to detect and fuse complementary features of the same object. Examples are operational status by IR sensors or material properties provided by multispectral sensor data. The use of different sensors enables the exploitation and the extraction of information on different levels. A data fusion as well as a feature fusion may suppor a value adding to the reconnaissance chain, which is especially helpful for the interpretation of built up areas in urban terrain. A prerequisite of every data fusion is the registration. In the case of heterogeneous datasets of sensors with different imaging properties a rigorous orthorectification is necessary. In this paper different examples are presented for a fusion of orthorectified multisensor data. Data fusion on pixel level and feature vector fusion are demonstrated using image data of IR, SAR, VIS and cadastral information.

关键词： Sensor data fusion

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Characteristics of the measurement unit of a full-waveform laser system

Characteristics of the measurement unit of a full-waveform l...

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作者： Jutzi, B. Stilla, U. FGAN-FOM Research Institute for Optronics and Pattern Recognition 76275 Ettlingen Germany Photogrammetry and Remote Sensing Technische Universitaet Muenchen 80290 Muenchen Germany

The analysis of data derived by full-waveform laser scanning systems is of great interest. In this study, we estimate the impulse response of a laser scanning system capturing the waveform. Considering the impulse response of the system is important for precise waveform analysis. The characteristic of the system has to be mentioned to interpret the pulse properties in an accurate way. We determined by experiments the impulse responses of the laser scanning system for different bandwidths, namely 250 MHz, 750 MHz, 1 GHz, and 6 GHz. By considering the impulse response the measured transmitted waveform of the emitted laser pulse can be adapted. The similarity of the adapted transmitted and received waveform is compared and discussed.

关键词： Waveform analysis

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Orthorectification as Preliminary Step for the Fusion of Data from Active and Passive Sensor Systems

Orthorectification as Preliminary Step for the Fusion of Dat...

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International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)

作者： Antje Thiele Karsten Schulz Ulrich Thoennessen Erich Cadario FGAN-FOM Research Institute of Optronics and Pattern Recognition Ettlingen Germany FGAN-FOM Research Institute for Optronics and Pattern Recognition Gutleuthausstrasse 1 76275 Ettlingen Germany. e-mail: schulz@fom.fgan.de FGAN-FOM Research Institute for Optronics and Pattern Recognition Gutleuthausstrasse 1 76275 Ettlingen Germany. e-mail: thoe@fom.fgan.de FGAN-FOM Research Institute for Optronics and Pattern Recognition Gutleuthausstrasse 1 76275 Ettlingen Germany. e-mail: cadario@fom.fgan.de

One of the main future tasks in the field of reconnaissance and surveillance is the data fusion of heterogeneous systems. For this purpose sensor data of airborne and spaceborne systems, which acquire the data from the same scene, with different spatial and spectral coverage are used. The use of different sensors enables the exploitation and the extraction of information on a higher level, supporting a value adding to the reconnaissance chain, which is especially helpful for the interpretation in urban terrain. A combination of active (SAR, LIDAR) and passive (VIS, IR) sensors is considered. Because of the different imaging properties of the sensor systems it is necessary to transform the datasets into a common coordinate system. For each imaging device a specific transformation equation system is applicable depending on the sensor parameters and supplementary metadata. In this proposal for the used devices the imaging transformation is presented, which allows a common exploitation of the sensor data for the same scenery. An orthorectification method especially for SAR images was developed and applied to airborne SAR data. The spatial accuracy of the transformed sensor data in the common coordinate system is assessed using cadastral data set

关键词： Sensor systems Reconnaissance Optical imaging Image sensors Surveillance Layout Data mining Laser radar Transforms Equations

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IR propagation in coastal environment - Results of the VAMPIRA trial

IR propagation in coastal environment - Results of the VAMPI...

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Optics in Atmospheric Propagation and Adaptive Systems IX

作者： Stein, Karin Vogel, Henrik FGAN-FOM Forschungsinstitut für Optronik und Mustererkennung Gutleuthausstrasse 1 76275 Ettlingen Germany FGAN-FOM Research Institute for Optronics and Pattern Recognition Gutleuthausstrasse 1 76275 Ettlingen Germany Danish Defence Research Establishment Ryvangs Alle 1 2100 Copenhagen Denmark

ISBN: (纸本)0819464597

The detection and tracking of missiles flying at a low altitude above the sea surface is one of the most urgent problems in ship self defence. These tasks are mainly managed by IR-Search and Track systems in the mid and long wave IR and by Radar systems. Both systems suffer severe limitations. The range efficiency of IR-systems is limited by atmospheric effects in the marine boundary layer. The NATO AC/323 SET-56/RTG32 on "Integration of Radar and Infrared for Ship Self Defence" has investigated the radar and infrared synergism with respect to propagation in a coastal environment. In spring 2004, the members have held the "VAlidation Measurements for Propagation in the Infrared and RAdar" (VAMPIRA). To have a direct comparison of RF and EO behaviour, several systems were set up at the same altitude above sea level (approx. 19 m). This paper deals with the results of the IR measurements. To simulate point-like targets at low altitudes, hot sources at different temperatures were installed onboard a small boat. Numerous mid and long-wave IR sensors made simultaneous measurements of the boat to analyse extinction versus range, maximum detection ranges and refraction effects. One efficient propagation model for the IR is IRBLEM (IR Boundary Layer Effects Model), developed by DRDC, CA. The measurements of the boat runs were compared to model predictions. Most of the measured data analyzed in this paper were gained by DDRE, DK. Based on the Danish results on the signal variations with range, a comparison with a Thermal Range Model for Point Target Detection (TRP) was done. TRP is an analytic model, which has been developed at fgan-FOM, GE, to estimate the range performance of a point target detection system working in the infrared.

关键词： Marine missiles

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Radargrammetric Extraction of Building Features from High Resolution Multi-aspect SAR Data

Radargrammetric Extraction of Building Features from High Re...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： U. Soergel E. Michaelsen A. Thiele U. Thoennessen Institute of Photogrammetry and GeoInformation University of Hannover Germany FGAN-FOM Research Institute of Optronics and Pattern Recognition Ettlingen Germany

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Building recognition Fusing Multi-Aspect High-Resolution Interferometric SAR Data

Building Recognition Fusing Multi-Aspect High-Resolution Int...

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IEEE International Symposium on Geoscience and Remote Sensing (IGARSS)

作者： A. Thiele E. Cadario K. Schulz U. Thoennessen U. Soergel FGAN-FOM Research Institute of Optronics and Pattern Recognition Ettlingen Germany IPG Institute of Photogrammetry and GeoInformation University of Hannover Germany

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Spatial mode cleaning by femtosecond filamentation

Spatial mode cleaning by femtosecond filamentation

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Quantum Electronics and Laser Science Conference, QELS 2006

作者： Prade, B. Franco, M. Mysyrowicz, A. Couairon, A. Buersing, H. Eberle, B. Krenz, M. Seiffer, D. Vasseur, O. Laboratoire d'Optique Appliquée ENSTA Ecole Polytechnique CNRS UMR 7639 Palaiseau 91761 France Centre de Physique Théorique Ecole Polytechnique CNRS UMR 7644 Palaiseau 91128 France FGAN-FOM Research Institute for Optronics and Pattern Recognition 76275 Ettlingen Germany ONERA Département d'Optique Théorique et Appliquée Palaiseau 91761 France

We study the characteristic conical emission of a blue femtosecond filament in air. A significant improvement of the beam quality is obtained during the filamentation process. © 2005 Optical Society of America.

ISBN: (纸本)1557528136

关键词： Quantum electronics

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Spatial Mode Cleaning by Femtosecond Filamentation

Spatial Mode Cleaning by Femtosecond Filamentation

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Conference on Lasers and Electro-Optics (CLEO)

作者： B. Prade M. Franco A. Mysyrowicz A. Couairon H. Buersing B. Eberle M. Krenz D. Seiffer O. Vasseur Laboratoire dOptique Appliquée Ecole Polytechnique ENSTA Palaiseau France Centre de Physique Théorique Ecole Polytechnique Palaiseau France FGAN FOM Research Institute for Optronics and Pattern Recognition Ettlingen Germany Département dOptique Théorique et Appliquée ONERA Palaiseau France

We study the characteristic conical emission of a blue femtosecond filament in air. A significant improvement of the beam quality is obtained during the filamentation process.

ISBN: (纸本)1557528136

We study the characteristic conical emission of a blue femtosecond filament in air. A significant improvement of the beam quality is obtained during the filamentation process.

关键词： Measurement by laser beam Laser beams Laser modes Ultrafast optics Power lasers Distance measurement Particle beams

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Segmentation, classification, and pose estimation of military vehicles in low resolution laser radar images

Segmentation, classification, and pose estimation of militar...

引用

Conference on Laser Radar Technology and Applications X

作者： Neulist, J Armbruster, W FGAN-FOM Research Institute for Optronics and Pattern Recognition (Germany)

ISBN: (纸本)0819457760

Model-based object recognition in range imagery typically involves matching the image data to the expected model data for each feasible model and pose hypothesis. Since the matching procedure is computationally expensive, the key to efficient object recognition is the reduction of the set of feasible hypotheses. This is particularly important for military vehicles, which may consist of several large moving parts such as the hull, turret, and gun of a tank, and hence require an eight or higher dimensional pose space to be searched. The presented paper outlines techniques for reducing the set of feasible hypotheses based on an estimation of target dimensions and orientation. Furthermore, the presence of a turret and a main gun and their orientations are determined. The vehicle parts dimensions as well as their error estimates restrict the number of model hypotheses whereas the position and orientation estimates and their error bounds reduce the number of pose hypotheses needing to be verified. The techniques are applied to several hundred laser radar images of eight different military vehicles with various part classifications and orientations. On-target resolution in azimuth, elevation and range is about 30 cm. The range images contain up to 20% dropouts due to atmospheric absorption. Additionally some target retro-reflectors, produce outliers due to signal crosstalk. The presented algorithms are extremely robust with respect to these and other error sources. The hypothesis space for hull orientation is reduced to about 5 degrees as is the error for turret rotation and gun elevation, provided the main gun is visible.

关键词： laser radar classification pose estimation ATR

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