20.500.12556/RUL-135368 Liquid level detection in standard capacity measures with machine vision Capacity measures are commonly used volume standards for testing measuring systems for liquids other than water. Manual readings from the measuring scale can often be difficult due to the location of the capacity measure or to the nature of the measured liquid. This article focuses on the automation of this procedure by using a single camera machine vision system. A camera positioned perpendicular to the transparent neck captures the image of the liquid meniscus and the measuring scale. The volume reading is determined with the user-defined software in the LabVIEW programming environment, which carries out the image preprocessing, detection of the scale marks and the liquid level, correction of lens distortion and parallax effects and final unit conversions. The realized measuring system for liquid level detection in standard capacity measures is tested and validated by comparing the automated measurement results with those taken by the operators. The results confirm the appropriateness of the presented measuring system for the field of legal metrology. liquid level standard capacity measure legal metrology machine vision parallax nivo kapljevine etalonska posoda zakonsko meroslovje strojni vid paralaksa true false true Angleški jezik Slovenski jezik Članek v reviji 2022-03-09 09:41:00 2022-03-09 09:41:05 2022-09-14 04:13:02 0000-00-00 00:00:00 2021 0 0 13 str. iss. 8, art. 2676 Vol. 21 Apr. 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 004.946:681.518.52:532(045) 1424-8220 10.3390/s21082676 59221251 RAZ_Bobovnik_Gregor_2021.pdf RAZ_Bobovnik_Gregor_2021.pdf 1 E6857E80022CAE821CEA6E4D1D24F7EB 71e682d29b645982049aae185a49cb6667ed186d217173c089ed42f5802be0b8 b310d58d-9f84-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154406 https://www.mdpi.com/1424-8220/21/8/2676 1 60e85b65-9f84-11ec-abdb-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=154405 Fakulteta za strojništvo 0 0 0