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DOI: 10.17586/1023-5086-2019-86-09-30-37
УДК: 681.772.7
Automatic sensitivity control in television systems
Full text «Opticheskii Zhurnal»
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Publication in Journal of Optical Technology
Цыцулин А.К., Лысенко Н.В., Манцветов А.А., Баранов П.С., Бобровский А.И. Автоматическое управление чувствительностью в телевизионных системах // Оптический журнал. 2019. Т. 86. № 9. С. 30–37. http://doi.org/10.17586/1023-5086-2019-86-09-30-37
Tsytsulin A.K., Lysenko N.V., Mantsvetov A.A., Baranov P.S., Bobrovskiy A.I. Automatic sensitivity control in television systems [in Russian] // Opticheskii Zhurnal. 2019. V. 86. № 9. P. 30–37. http://doi.org/10.17586/1023-5086-2019-86-09-30-37
A. K. Tsytsulin, N. V. Lysenko, A. A. Mantsvetov, P. S. Baranov, and A. I. Bobrovsky, "Automatic sensitivity control in television systems," Journal of Optical Technology. 86(9), 555-560 (2019). https://doi.org/10.1364/JOT.86.000555
This paper discusses a way to resolve the contradiction between a tendency to maximize the optical-signal intensity range of objects and the limited dynamic range of photodetectors. Methods of controlling the sensitivity of television systems are analyzed, taking into account how they affect the spatial, temporal, noise, and other image-quality criteria. Diagrams from automatic-control theory are adapted to sensitivity-control systems, and a flowchart is proposed for an automatic sensitivity-control system that uses five methods with a specified sequence of priorities. A method is proposed that makes it possible to expand the working illuminance range in Pregius-series photodetectors (Sony) to 200 dB—i.e., by more than 40 dB—by controlling the accumulation time and the analog and digital amplification in combination.
sensitivity control in television system, accumulation time, CCD-array-based, CMOS sensors
Acknowledgements:The research was supported by the Ministry of Education and Science of the Russian Federation (project No. RFMEFI57817X0242).
OCIS codes: 040.1490
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