Using the example of the formation of capillary waves on the surface of a molten metal induced by the merging of a drop of liquid galinstan in the impact mode, an attempt is made to construct a systematic approach to filtering images of drop and wave flows. The technique is based on assessing the statistical parameters of noise with the selection of filters that best suit a certain type of noise, followed by the signal-to-noise ratio estimation. The paper provides a review of the literature on both various types of filters and image processing in fluid mechanics.
capillary waves, drop impact, image processing, median filter, histogram, signal-to-noise ratio.
Подавление шумов и фильтрация при обработке изображений капельных и волновых течений.
На примере образования капиллярных волн на поверхности расплавленного металла, индуцированных слиянием капли жидкого галинстана в импактном режиме, дана попытка построения систематизированного подхода к фильтрации изображений капельных и волновых течений. Методика основана на оценке статистических параметров шума с подбором фильтров, которые наилучшим образом подходят под определенный тип шума, с последующей оценкой отношения «сигнал/шум». В работе дан обзор литературы как по типам фильтрам, так и по обработке изображений в механике жидкостей.
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