How do I get rid of these purple blocks captured by the camera?
Hello David,
It looks like you are in cooked mode and Pixy has a color signature that it’s displaying (a bad color signature) If you select “clear all signatures” in the action menu, it will delete the (bad) signature and the blocks should go away.
http://cmucam.org/projects/cmucam5/wiki/Action_Menu
Hope this helps!
Edward