EFRM-based detection and extraction of ridge and valley features in grey level images
Tim Chown, Paul H. Lewis · 2003
Describes a method for locating and extracting ridge and valley (and hence line) features in grey level images. A representation of the image known as the extended facet region model (EFRM) is first formed. The primary grouping constraint in this process is the orientation of patches in the image intensity surface. Inspection of geometric relationships between entities in the EFRM leads to the identification of ridge and valley structures and the subsequent placement of extracted line paths. The structures have knowledge of the local topological form of the image.>