to find and draw center line across a curved structure in an image

sir, how the center line of a curved structure is found.

[Kevin Claytor]

There's an example of detecting circles in the documentation that should get you on your way. Post back with some example code if you have any problems.

[Image Analyst]

Sorry Kevin, this is just a much much worse duplicate of something he keeps posting. What he really wants is the cross sectional profile as he traverses along a rib in a radiograph.