“…In addition, both tend to systematically over‐/underestimate the sizes of grains (e.g., Chardon et al, 2020; Chardon, Piasny, & Schmitt, 2022; Mair et al, 2022a). Therefore, and most recently, attention turned to deep neural networks, with the aim either to improve the segmentation in images (e.g., Chen et al, 2023; Chen, Hassan, & Fu, 2022; Mörtl et al, 2022; Soloy et al, 2020) or to directly predict percentile values of a grain size distribution (e.g., Buscombe, 2020; Lang et al, 2021). The main aims of all these works were to automate the measurements, improve the reproducibility and scalability, and to increase the number of observations.…”