The length of the arrow is equal the radius of the operator. The results are very promising. In the right image, we find all three corners of the junction, but they do not exist at the same point. This happens because the three boundaries are not all straight. If necessary, the three corners could be labeled as a junction since their locations and orientations match favorably.
Most corner detectors published in the literature assume that each wedge is constant.
The Earth Mover's Distance gives us an intuitive and efficient way to compute the distance between two signatures. The results show that edges can be detected in difficult situations involving subjective boundaries and interfering edges that violate the assumptions of Canny's edge detector. A major advantage of using the EMD to compute distance is that it can handle partial matches, allowing corner detection to be done in the same framework as edge detection. While the description of edges, corners, and junctions is mostly complete, there is still much work to be done in the detection and linking of these features. A final aspect which deserves attention is the integration of information from multiple scales.