Hi All, I have a question about Canny Edge Detection using i.edge
1) I produce a thinned binary image as below r.thin --overwrite input=line_element output=thinned_line_element a) the "line_element" represents valleys that are, at places, few pixel wide b) the output "thinned_line_element" represents valley lines that are a single pixel wide 2) I run the Canny edge detector on "thinned_line_element" as below i.edge --overwrite input=thin_line_element output=edge_map angles_map=angle_map The resultant "edge_map" produces a monotone (no edges) edge map and the "angle_map" outputs the angles correctly 3) Running the Canny edge detector on the un-thinned "line_element" i.edge --overwrite input=line_element@PERMANENT output=edge_map1 angles_map=angle_map1 produces both "edge_map1" and "angles_map1" correctly. Any idea why the Canny edge detector does not produce edge map on thinned image? Kind regards, Venka _______________________________________________ grass-user mailing list [email protected] https://lists.osgeo.org/mailman/listinfo/grass-user
