Diffusion assessment through image processing: beyond the point-source paradigm Eugene B. Postnikov, Anton A. Namykin, Oxana V. Semyachkina-Glushkovskaya and Dmitry E. Postnov Eur. Phys. J. Plus, 136 5 (2021) 480 Published online: 03 May 2021 DOI: 10.1140/epjp/s13360-021-01487-9