| cutarcs | Remove arcs connecting different color nodes |
| -vdata <nodes> | graph nodes |
| -edata <arcs> | graph arcs |
| -dout <arcs> | arcs left after cutting |
This command removes arcs connecting nodes that have different color (third field in the nodes data frame). This command is mainly used for removing some of the arcs that command delaunay produces.
Example: Following commands load an image, find top and bottom points, connect points, remove arcs connecting tops and bottoms and finally show the resulting graph on the original image.
... # Load image NDA> loadimg paper.gif img_in NDA> cnvimg -in img_in -out img_gray -gray # Find top and bottom points NDA> findtb -in img_gray -dout nodes -size 5 # Connect neighbouring points NDA> delaunay -vdata nodes -dout arcs # Remove part of the arcs NDA> cutarcs -vdata nodes -edata arcs -dout part # Convert graph into image NDA> gr2fr -vdata nodes -edata part -dout pix NDA> f2i -d pix -iout img -bgimg img_gray Doing grayscale Image is 512 x 512. # Show image NDA> mkgrp g NDA> bgimg g -img img NDA> show g