Fit random hole

[Fredje]

Hello,

For a control of punched steel-strips, I need to measure (size and position) all the holes that are punched.

The holes have different shapes. Round, oval, slot or keyhole.

I take pictures during the throughfeed of the steelstrip and I have to process them at +/- 5Hz.

I need to find all the holes in my pictures, and find out what - kind of hole it is

                                                                                      - the size of the hole is

                                                                                      - the position of the hole is.

Taking the pictures, fitting a round hole, measuring the position is no problem.

But I can't fit an oval hole, a slot or a keyhole. Let alone that I have to find out what kind the hole is ...

Does anyone has an idée of how you can start on this...

Thanks in advance!

[ABCPrograms]

If you're using Vision, I guess BLOB analysis is you key answer. 

You can find multiple examples in LabVIEW om how to use this.

Kind regards,

Bjorn Conjaerts