Active-pulse television measuring systems images space-time filtration by range

Abstract

The paper proposes an approach for visualizing objects on images obtained with active-pulse television measuring systems (AP TMS) by range. The calculation of the AP TMS active vision area shape allows getting data of the light energy distribution inside the active vision area. To distinguish the object of interest on the video frame, an inter-frame difference of several frames obtained with different gating delays can be found. The equation of inter-frame difference for three frames is proposed. The difference simulation for three active vision areas was performed. To test the method of images space-time filtration by range, we used images obtained as a result of experimental studies conducted using large aerosol chamber of the V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science (IAO SB RAS). In order to conduct the experiment video frames obtained under conditions of normal transparency of the propagation medium at different gating delays of the image intensifier tube (IIT) were taken. During the experiment, an image of the measuring table located at a distance of 15 m was distinguished, and the remaining objects located in the system’s field of view were successfully removed using space-time filtration. Removing of the “unwanted” information from images will increase the compression ratio and speed up the algorithms for further processing.The results obtained in this paper contribute to a more efficient use of the AP TMS for the purpose of detection and recognition of the objects under various conditions of visibility.