An international group of scientists has conducted research to identify the most robust and reliable thresholding method in image analysis of soiling on PV panels. Thresholding is the process that converts a micrograph into a binary black and white image, corresponding to particle and background. “Image analysis has often been used to characterize the soiling accumulated on glass coupons,” the research lead author, Leonardo Micheli told PV magazine. The results of the various thresholding methodologies were then compared in terms of the coefficient of variation and the relative deviation from the average. In addition, a survey was conducted among 18 soiling experts to assess the reliability of the different methodologies visually.

Source: The North Africa Journal January 02, 2024 11:03 UTC