This THETA plug-in will detect circles in the image. Once at least one circle has been detected, it will save a picture with the circles outlined in pink. It will continue to snap pictures as long as it can detect circles.
Description of plug-in from developer Alex Merchen: "So I wanted my plug-in to do a few things with the most important ones being to identify circles and the second to be save them. I want to be able to count circles because that will allow me to eventually count people and save pictures of when there are too many people. I also decided I wanted to be able to tell on the device itself when the device was taking pictures instead of blindly guessing that it was working correctly."