How to remove part of ROI selection (cut of two areas)

[labjan]

Dear forum,

consider the following problem:

I load a picture into LabVIEW as an IMAQ (Vision Module). 

Now I select two regions of interest (ROIs A and B), which cover an overlapping regions of the picture.

Is it possible to have a selection that results from the cut of A with B?

(Set theoretically writing: A \ B)

Kind regards,

Jan

[mfitzsimons]

Are your ROIs square, circle, or free hand?  Can you post an example?

Think you are asking for "not (A union B)"

http://www.purplemath.com/modules/venndiag2.htm

[labjan]

Referring to the quoted website, I am looking for case 4) "A - B" or "A complement B".

To quote the site:

Everything in A  except for anything in its overlap with B.

[mfitzsimons]

Can you do a fill (white or black) of area B then just grab A?  That would have all of A with the B portion filled in with a solid color?

[mfitzsimons · Accepted solution]

A complement B