Geometric Pattern Match - algorithm

[VeMo]

Hello All,

I have a program for geometric pattern matching (see attached picture for vi's I have used) and I was looking at an example from LabVIEW examples as well. Can anyone please help me find out which algorithm this vi's are using to perform geometric pattern match? 

I understand it may be hard to find exact algorithm since LabVIEW has their own codes but I just want to find out algorithm/theoretical process that is close to what this vi's are using so I can read and understand the idea behind the work/pattern matching these vi's are performing. 

Thanks

[Andrey_Dmitriev]

Most of algorithms inside of NI Vision are "closed", but some information is available in Concepts Manual:

Official NI PDF in the attachment, read it from page 254.

[VeMo]

Thank you for the information. I will read through it.