What is an image object skeleton? Skeletons describe the inner structure of a polygon, which represents an image object; they help to further describe an object’s shape. Skeletons are created based on a Delauney triangulation of the object’s shape and are composed of main lines and branches. The main line is the longest possible connection of branch points. Branches are based on the type of triangles that are created and can be compared to the stream order of a river network.

To view the image object skeletons, go to the Object Levels tab in the View Settings, and select object outline as a polygon (raster or smooth), and check the box for Show Skeleton. You will now be able to see an image object's skeleton, once you have selected one on the image.