Remote detection and size estimation of optical apertures

Ove Steinvall; Bengt Ericson

doi:10.1117/12.2533035

7 October 2019 Remote detection and size estimation of optical apertures

Ove Steinvall, Bengt Ericson

Proceedings Volume 11161, Technologies for Optical Countermeasures XVI; 111610I (2019) https://doi.org/10.1117/12.2533035
Event: SPIE Security + Defence, 2019, Strasbourg, France

Abstract

Detection of optical threats in the form of weapon sights and target acquisition systems is important and can be made using retro-detection or other techniques. It is also of great value if one can classify the optical systems so that proper counter action can be initiated. Several techniques to estimate the aperture size of the threatening aperture may be applied. In this paper a method based on image processing utilizing high resolution photographs will be presented. In order to investigate the potential to detect optical apertures, and also estimate the aperture sizes, some experiments were made using small black metal circular plates as well as real optics out to 2 km range. The targets were photographed using a commercial digital SLR camera with a telephoto lens. This was done from a laboratory about 20 meter above ground level with targets on the ground, which means that the turbulence was lower than it would have been closer to the ground. Detection and size estimation of optical apertures by image processing, has some potential which will be exemplified by the experimental results and some simulations.

Conference Presentation

Citation Download Citation

Ove Steinvall and Bengt Ericson "Remote detection and size estimation of optical apertures", Proc. SPIE 11161, Technologies for Optical Countermeasures XVI, 111610I (7 October 2019); https://doi.org/10.1117/12.2533035

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