Image processing doesn't show

[gulta]

Hi!

I am trying to do image processing, where it will detect the object and box it up when detected. 

However, I did not manage to detect the object, which in this case, a masking tape.

Can anyone tell me what is wrong and how to solve it?

Below is the attached VI that I have done.

[mikeporter]

Before we can answer we also need to see the kind of image you are processing.

Mike...

[gulta]

This is the image i was trying to get.

[mikeporter]

Is this what the image you will be acquiring will look like? Won't the tape be coming down a production line or something?

Mike...

[gulta]

No. This is just for testing purpose. I don't have the actual image as it is for an obstacle in a competition.

However, the obstacle is also a ring as well. 

I just found a way to detect the object.

I used geometric matching instead of pattern matching, but it was able to detect other things such as my laptop as well.

Is there a way to detect the image and change the diameter of the ring so that it is able to detect other rings with a larger diameter?

Thanks for your help.

Attached below are the changes i have made and the images it detected.