Data example and code used in the publication "Is transport of microplastics different from that of mineral dust? Results from idealized wind tunnel studies"

Background

The code labels microspheres and counts them. Further, the code determines which microspheres are independent of microsphere-microsphere collisions by their relative position to the other microspheres in an image. Images were taken with a full-frame visual camera (Sony Alpha 7RII) with a long-distance-microscopy lens (K2 DistaMax).

Description of the dataset

• image_data_all.zip contains 228 tif-format images taken in a single experiment
  • the images show borosilicate microspheres with diameters from 63 to 75 µm
  • during the experiment, the microspheres are detached from the substrate and are transported out of the image
• functions_particle_labeling.jl contains all necessary functions for particle labeling
• analysis_protocol.jl is an example, that first determines a color threshold, and then labels all microspheres in all images stored in "image_data_all/substrate_a/image_data_single_experiment"
• post_processing_visualisation.R is an r-script, that reads the output of analysis_protocol.jl and demonstrates how logistic functions were fitted to the data

We used julia 1.8.5 and R 4.3.0.