The chemical and physical properties of thermally sprayed coatings depend in part on surface characteristics, such as texture and roughness, that can be difficult to quantify. This paper demonstrates the use of fractal analysis for quantifying surface roughness based on images obtained from cross-sectioned samples. An isolated profile of an Al2O3-TiO2 coating on an aluminum substrate is used as the test case. The first part of the paper covers the basic concept and the procedures used. The second part presents practical examples and precautions that must be observed to obtain accurate and reproducible results. Paper includes a German-language abstract.