Recent developments in experimental geomechanics have enabled the characterization of grain-scale measurements with x-ray computed tomography (CT) and thus paved the way for the micromechanical characterization of granular materials. However, the images coming from x-ray CT are limited with respect to their resolution if a representative specimen is to be investigated [1]. When trying to extract the fabric of such images the accuracy of the methods is crucial. This study investigates the accuracy of some standard and advanced approaches to determine different fabric entities with synthetic as well as real images.