how to find the intersection point of two objects

[LC]

Dear All,

I am new to image processing and using OpenCV on python for implementing a 
part of research work.
The aim is :

   - To identify the predecessor and successor of an object (shape) and 
   - To calculate the Indegree(edges coming on shape) and outdegree(edges 
   going out from shape) of object. 
   
Or is thr anyway to find digraph for given image?

Can anybody help to find the intersection point of two object called 
rectangle and edges(directed line) in the attached img?

your guidance /pointers will be appriciated.

thanks & regards




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