MorphologicalBranchPoints

MorphologicalBranchPoints[image] gives a version of a binary image image in which white pixels represent the morphological branch points.

Examples

img = Thinning[Binarize[ExampleData[{"TestImage", "Lena"}]]];
MorphologicalBranchPoints[img]

MorphologicalBranchPoints[SkeletonTransform[DiskMatrix[20]]]

Please visit the official Wolfram Language Reference for more details.