Using the vision processing function of FIRST to find circles

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Hello

As we all know, the vision processing software of FIRST allows us to find a black ring which is needed to find two round shapes (the vision target), so we have two questions:

a. How can we change the software so we can find a circle of any color?

b. How can we change the software so we can only find the outer circle (not a ring) without the inner round shapes?

Both are supposed to be simple to change the software, as the more complicated functions are already inside (the actual search function).

Thank you
Team 3089