For spray pesticide applications, drop size spectrum is one of the most important factors affecting environment and operator safety. Assessment of drop size distribution is based on different techniques, among which those based on image analysis are quite widespread. Errors on drop size measurement when using image analysis systems may depend upon several factors. In the present research the measurement error was evaluated at varying image resolution and drop diameter by means of simulation of Water Sensitive Papers (WSP). The main results showed that lower the image resolution, higher the relative error, and higher the diameter, lower the relative error. Considering an average absolute error on drop diameter lower than 5%, the stain diameter on WSP should be larger than about 300 μm at 300 dpi, larger than about 140 μm at 600 dpi, and larger than about 80 μm at 1200 dpi.

Error on Drop Size Measurement Due to Image Analysis Digitisation

Manetto, Giuseppe;Cerruto, Emanuele;Longo, Domenico;
2022-01-01

Abstract

For spray pesticide applications, drop size spectrum is one of the most important factors affecting environment and operator safety. Assessment of drop size distribution is based on different techniques, among which those based on image analysis are quite widespread. Errors on drop size measurement when using image analysis systems may depend upon several factors. In the present research the measurement error was evaluated at varying image resolution and drop diameter by means of simulation of Water Sensitive Papers (WSP). The main results showed that lower the image resolution, higher the relative error, and higher the diameter, lower the relative error. Considering an average absolute error on drop diameter lower than 5%, the stain diameter on WSP should be larger than about 300 μm at 300 dpi, larger than about 140 μm at 600 dpi, and larger than about 80 μm at 1200 dpi.
2022
978-3-030-98091-7
978-3-030-98092-4
Droplet pulverisation; Image resolution; ImageJ; Stain diameter; Water sensitive papers
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/525203
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