ESTIMATION OF SCAN RATE OF RANDOM TEXTURE BY A MULTI-ARRAY PHOTODECTOR
G. I. Gromilin1, V. P. Kosykh1,2, B.N. Drazhnikov3, K. V. Kozlov3, V. N. Vasil'ev4
1Institute of Automation and Electrometry, Siberian Branch, Russian Academy of Science, prosp. Akademika Koptyuga 1, Novosibirsk, 630090
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090
3Orion Research and Production Association, ul. Kosinskaya 9, Moscow, 111538
4Research Institute of Optoelectronic Devices, ul. Leningradskaya 29, Sosnovyi Bor, 188540, Leningrad Region
Keywords: сканирующее устройство, матричный фотоприёмник, режим ВЗН, скорость сканирования, случайная текстура, спектр мощности, scanning device, photodetector array, TDM mode, scan speed, random texture, power spectrum
Abstract
Scanning devices based on a set of mutually biased photodetector arrays require a high degree of stabilization of the scan speed to increase the sampling rate in a direction orthogonal to the scanning direction for high quality of the image being formed. A new method is proposed for estimating the scanning rate, based on the analysis of displacements of images of arbitrary random texture created by arrays during scanning. The dependence of the accuracy of various methods of speed estimation on the statistical characteristics of the texture is studied by simulation. It is shown that even at a sufficiently high level of random noise (C/N =10) even for images with texture that satisfied the Nyquist criterion for each array, the scan speed estimation error does not exceed 0.1 % of the nominal value.
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