Paper
10 October 2007 Assessment of laser-dazzling effects on TV cameras by means of pattern recognition algorithms
Anne Durécu, Olivier Vasseur, Pierre Bourdon, Bernd Eberle, Helge Bürsing, Jean Dellinger, Nicolas Duchateau
Author Affiliations +
Proceedings Volume 6738, Technologies for Optical Countermeasures IV; 67380J (2007) https://doi.org/10.1117/12.737264
Event: Optics/Photonics in Security and Defence, 2007, Florence, Italy
Abstract
Imaging systems are widespread observation tools used to fulfil various functions such as detection, recognition, identification and video-tracking. These devices can be dazzled by using intensive light sources, e.g. lasers. In order to avoid such a disturbance, dazzling effects in TV-cameras must be better understood. In this paper we studied the influence of laser-dazzling on the performance of pattern recognition algorithms. The experiments were performed using a black and white TV-CCD-camera, dazzled by a nanosecond frequency doubled Nd:YAG laser. The camera observed a scene comprising different geometrical forms which had to be recognized by the algorithm. Different dazzling conditions were studied by varying the laser repetition rate, the pulse energy and the position of the geometrical forms relative to the laser spot. The algorithm is based on edge detection and locates areas with forms similar to a reference symbol. As a measure of correspondence it computes the degree of correlation of the different areas. The experiments show that dazzling can highly affect the performance of the used pattern recognition algorithms by generating lots of spurious edges which mimic the reference symbol. As a consequence dazzling results in detrimental effects, since it not only prevents the recognizing of well defined symbols, but it also creates many false alarms.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Anne Durécu, Olivier Vasseur, Pierre Bourdon, Bernd Eberle, Helge Bürsing, Jean Dellinger, and Nicolas Duchateau "Assessment of laser-dazzling effects on TV cameras by means of pattern recognition algorithms", Proc. SPIE 6738, Technologies for Optical Countermeasures IV, 67380J (10 October 2007); https://doi.org/10.1117/12.737264
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Cited by 16 scholarly publications.
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KEYWORDS
Detection and tracking algorithms

Cameras

Pattern recognition

Imaging systems

CCD cameras

Nd:YAG lasers

Pulsed laser operation

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