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Proceedings Paper

Real-time computer treatment of THz passive device images with the high image quality
Author(s): Vyacheslav A. Trofimov; Vladislav V. Trofimov
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Paper Abstract

We demonstrate real-time computer code improving significantly the quality of images captured by the passive THz imaging system. The code is not only designed for a THz passive device: it can be applied to any kind of such devices and active THz imaging systems as well. We applied our code for computer processing of images captured by four passive THz imaging devices manufactured by different companies. It should be stressed that computer processing of images produced by different companies requires using the different spatial filters usually. The performance of current version of the computer code is greater than one image per second for a THz image having more than 5000 pixels and 24 bit number representation. Processing of THz single image produces about 20 images simultaneously corresponding to various spatial filters. The computer code allows increasing the number of pixels for processed images without noticeable reduction of image quality. The performance of the computer code can be increased many times using parallel algorithms for processing the image. We develop original spatial filters which allow one to see objects with sizes less than 2 cm. The imagery is produced by passive THz imaging devices which captured the images of objects hidden under opaque clothes. For images with high noise we develop an approach which results in suppression of the noise after using the computer processing and we obtain the good quality image. With the aim of illustrating the efficiency of the developed approach we demonstrate the detection of the liquid explosive, ordinary explosive, knife, pistol, metal plate, CD, ceramics, chocolate and other objects hidden under opaque clothes. The results demonstrate the high efficiency of our approach for the detection of hidden objects and they are a very promising solution for the security problem.

Paper Details

Date Published: 9 May 2012
PDF: 11 pages
Proc. SPIE 8362, Passive and Active Millimeter-Wave Imaging XV, 83620J (9 May 2012); doi: 10.1117/12.919770
Show Author Affiliations
Vyacheslav A. Trofimov, Lomonosov Moscow State Univ. (Russian Federation)
Vladislav V. Trofimov, Lomonosov Moscow State Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 8362:
Passive and Active Millimeter-Wave Imaging XV
David A. Wikner; Arttu R. Luukanen, Editor(s)

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