Real-time objects recognition by the photoanisotropic copies

Barbara Kilosanidze; George Kakauridze

doi:10.1117/12.737588

8 October 2007 Real-time objects recognition by the photoanisotropic copies

Proceedings Volume 6741, Optics and Photonics for Counterterrorism and Crime Fighting III; 67410B (2007) https://doi.org/10.1117/12.737588
Event: Optics/Photonics in Security and Defence, 2007, Florence, Italy

Abstract

The method of object recognition is described by the example of objects of amplitude transparent type. The method is to obtain a photoanisotropic copy of object images on the polarization-sensitive material. At consequent illumination of the photoanisotropic copy with a parallel circularly polarized beam of nonactinic light, the transmitted light becomes elliptically polarized. It is shown that the characteristics of the summary polarization ellipse in the Fraunhofer diffraction region uniquely identify the given object. The real time determination of the characteristics of the summary polarization ellipse is made by means of diffraction gratings of anisotropic profile and by comparison of these characteristics with etalon from database.

Citation Download Citation

Barbara Kilosanidze and George Kakauridze "Real-time objects recognition by the photoanisotropic copies", Proc. SPIE 6741, Optics and Photonics for Counterterrorism and Crime Fighting III, 67410B (8 October 2007); https://doi.org/10.1117/12.737588

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