UDC 004.93.12
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2 Taras Shevchenko National University of Kyiv, Kyiv, Ukraine, and V.M. Glushkov Institute of Cybernetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
yuri.krak@gmail.com
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DETERMINING THE CENTROID OF A LASER SPOT IN THE PLANE OF A MULTIMEDIA
SHOOTING GALLERY SENSOR BASED ON THE METHODS OF INTERPOLATION
AND FILTERING OF THE IMAGE FRAGMENT
Abstract. The authors consider the problem of determining the position of the centroid of a laser spot on the plane of the photosensor in a multimedia shooting gallery. A two-stage approach to solving this problem is proposed. The possibilities of increasing the accuracy of determining the centroid by explicitly highlighting the contours of the spot (2nd stage of processing) instead of determining the boundaries of the laser spot through threshold binarization are investigated. The approaches to determining the contours of the spot are analyzed. To solve the problem, the scale of the image fragment was increased through the interpolation of new points. The possibilities of highlighting the contour of the spot by processing a fragment of the image with filters of low and high frequencies are investigated. A comparative assessment of the accuracy of the basic algorithm and that of the modified version was carried out, which showed that the modified algorithm increases the accuracy of determining the centroid by 30%. Higher accuracy was achieved because the modified method made it possible to find the explicit contours of the spot.
Keywords: multimedia shooting range, laser spot, contour, centroid, digital image filters.
FULL TEXT
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