Diffusion assessment through image processing: beyond the point-source paradigmEugene B. Postnikov, Anton A. Namykin, Oxana V. Semyachkina-Glushkovskaya and Dmitry E. PostnovEur. Phys. J. Plus, 136 5 (2021) 480DOI: https://doi.org/10.1140/epjp/s13360-021-01487-9