Engineering Physics Annotation << Back APPROBATION OF THE AUTOMATIC FOCUSING ALGORITHM USING A SHARPNESS COEFFICIENT ON THE TEST IMAGES M.S. MALYGIN Sharpness assessment in the receivable image the coefficient is introduced which takes into account correlation between low-frequency and high-frequency components in spatial spectrum of images. The purpose of the research was to develop methods of automatic focusing the images, developing them on a laboratory sample of an optical observation system to determine the optimal parameters of the algorithms and their practical implementation. Keywords: Autofocusing, sharpness image, sharpness coefficient. DOI: 10.25791/infizik.04.2020.1127 Pp. 03-12.