@conference {geissler1995b, title = {Depth-from-Focus Verfahren zur absoluten Gr{\"o}{\ss}en- und Konzentrationsbestimmung kleiner Teilchen}, booktitle = {Bildverarbeitung{\textquoteright}95 - Forschen, Entwickeln, Anwenden}, year = {1995}, pages = {365--380}, publisher = {Technische Akademie Esslingen}, organization = {Technische Akademie Esslingen}, doi = {10.5281/zenodo.14710}, author = {Peter Gei{\ss}ler and Thomas Scholz and Bernd J{\"a}hne and Schmidt, C. and H. Suhr and G. Wehnert}, editor = {Ahlers, R. -J.} }