This demonstration shows the directional local features computed from the gradient structure tensor. The only parameter is the local neighborhood window which is here a Gaussian window of standard deviation σ. To get more information, consult the documentation. Other features are accessible using the ImageJ plugin: OrientationJ.
Reference: Z. Püspöki, M. Storath, D. Sage, M. Unser, "Transforms and Operators for Directional Bioimage Analysis: A Survey," Advances in Anatomy, Embryology and Cell Biology, vol. 219, Focus on Bio-Image Informatics, Springer International Publishing, May 21, 2016.