Fig. 6From: A practical primer for image-based particle measurements in microplastic researchValues of different shape descriptors for two-dimensional projections of microplastics and some common geometries, i.e., A a spherical particle, B a spherical particle with rough edges, C an ellipse, D a quadratic film, E a quadratic film with rounded edges, F a rectangular film, G an irregular particle, H a stretched particle with rough edges, and I a microfiberBack to article page