ISSN 0021-3454 (print version)
ISSN 2500-0381 (online version)
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12
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vol 63 / December, 2020
Article

DOI 10.17586/0021-3454-2018-61-8-725-729

UDC 681.518

DETERMINATION OF SIZE AND LOCALIZATION OF IMAGE AREA CONTAINING SIGNAL WITH CONSTANT CLOCK FREQUENCY

E. S. Ilina
NTC Pribor, Ltd., Saint Petersburg, 199034, Russian Federation; ITMO University, Saint Petersburg, 197101, Russian Federation; engineer; postgraduate


S. V. Bystrov
ITMO University, Saint Petersburg, 197101, Russian Federation; Associate professor


A. A. Blinnikov
NTC Pribor, Ltd., Saint Petersburg, 199034, Russian Federation; Head of software departmen


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Abstract. The problem of determining the size and localization of the marking area of the object is solved by analysis of the object image. Using the detected repetition frequency of text labels, the size of the area containing the marking pattern is determined. To localize the label area, a new type of matrix filter is developed, based on the obtained data on the size of the sought domain and a priori knowledge of the number and length of the label strokes. Application of the filter allows for determining the label center by maximal brightness of corresponding pixel.
Keywords: localization, matrix filter, marking, filtration, frequency, digital signal and image processing

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