Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

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METHOD FOR MEASURING DISTORTION IN WIDE-ANGLE VIDEO CHANNELS


DOI: 10.5937/jaes16-17344
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions. 
Creative Commons License

Volume 16 article 530 pages: 274 - 280

Aleksander Krotov
St. Petersburg Electrotechnical University (“LETI”), The Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Russian Federation

Dmitry Volkov
St. Petersburg Electrotechnical University (“LETI”), The Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Russian Federation

Nikolay Romanov
St. Petersburg Electrotechnical University (“LETI”), The Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Russian Federation

Nikolay Gryaznov
St. Petersburg Electrotechnical University (“LETI”), The Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Russian Federation

Evgeny Sosnov
St. Petersburg Electrotechnical University (“LETI”), The Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Russian Federation

Dmitry Goryachkin
St. Petersburg Electrotechnical University (“LETI”), The Russian State Scientific Center for Robotics and Technical Cybernetics (RTC), Russian Federation

Methods for correcting aberrations of images, obtained by an optoelectronic camera with the use of preliminary measured calibration function, provoke wide interest in recent years. For the most part these methods are not characterized by high accuracy and are typically used for cameras with objectives having rather high relative distortion. In this article the method is discussed for measuring distortion of a wide-angle objective for calibration of photoelectric cameras designed to measure angular coordinates of remote objects with the accuracy as high as 10 arcseconds. It is proposed to use an air mirror-wedge as a test object, which allows creating a sheaf of collimated beams. The calibration function of a photoelectric camera is calculated by mathematical post-processing of the recorded frames. The proposed method was experimentally tested for photoelectric cameras with full angular fields-of-view of 21 degrees and angular pixel sizes of 20 arcseconds. The subpixel accuracy of determining the calibration function is demonstrated.

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This article has been prepared with the help of the financial support of the Ministry of Education and Science of the Russian Federation. Agreement No.14.581.21.0018 dated 9 November 2015; Unique Identifier for the Applied Scientific Research and Development is RFMEFI58115X0018.

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