It is capable of identifying thousands of objects by individual features.
An optical fast pattern recognition system was developed by scientists from the National Research Nuclear University MEPhI. For this, scientists used a light modulator and computer hologram calculation methods.
Modern recognition systems, including neural networks installed at train stations and airports, work almost in real time: they process several dozen frames within a second, tracking or recognizing units or dozens of objects.
As reported by «MK» in the Laboratory of Photonics and Optical Information Processing of the Institute, they created a system that is capable of processing tens of thousands (!) frames per second.
For this, our scientists used the so-called micromirror light modulators in the optical system.
– Such a modulator consists of millions of tiny – micromirrors that are capable of reflecting incident light in two directions, – told «MK» one of the authors of the development, associate professor Pavel Cheremkhin. – This allows for very short time intervals – at the level of tens of microseconds – convert light coming from a tracked or recognized object. For quick comparison with images of objects, specially calculated holograms displayed with the help of a modulator – holographic filters. Due to the high speed of operation, our system allows you to recognize both stationary and moving objects.
Despite the fact that the technologies for creating micromirror space-time light modulators were developed in the USA, our scientists have found opportunities to expand the possibilities of their application. They were the first to create an experimental sample of a pattern recognition system based on such modulators using holograms. At the same time, scientists used the Hartley integral transformation to calculate, & nbsp; which saves time and speeds up the calculation of holograms. In addition, the files of such filters are smaller, which is important for their storage and for the speed of their entry into the system. In addition, the advantage of the system is the ability to use non-laser radiation, which allows you to increase the number of recognizable features and reduce the noise level.
Such systems can be used not only in the field of security, but also in medicine, as well as in engineering and industry – for searching, identifying and tracking objects with complex shapes, when creating optical tweezers, for holographic memory systems, systems for encoding video information streams, etc.