find a external tangent in image(array) in automatic way

How can I find the points of tangency in red, with the aid of an automatic procedure?

[DGM]

Define "red". If you want an automated procedure, that implies that you have many images. Do they share an identical color map?

[Michele Manolio]

Now the red points were found with interactive functions with the operator. I was wondering if for different pressure maps it was possible to have a single automatic procedure that found these points.

Answer 1

[Xiao MA]

Hi, I am also studying in forensic science related to bare footprints. I have the same problem. I am currently looking for a solution. Perhaps we can leave the email or anything for long term communication.