This talk covers the use of algorithms to determine the geometric properties of technical parts from image data. The presented methods focus on processing 2D images of part contours, breaking them down into straight lines and circular segments. These techniques also calculate the sizes and lengths of these segments. The main goal of the methods is to improve quality control in industrial production, ensuring parts meet required geometric tolerances after manufacturing. An example will be the measurement of an air bearing foil made by Robert Bosch GmbH, but these methods can be applied to other parts as well. The presentation is based on work that was done at the Robert Bosch GmbH.