Vision systems that detect color can be an important tool for verifying that the correct components are present in an assembly.

This is so commonplace that we are only aware of it when we see something wrong: a black pea among the green ones on a dinner plate, a wrong color button on a suit, or the wrong suit for the occasion. Because our attention is drawn to imperfections, even minor ones can have an immense impact on an item's value. Consider the potential liability of a fabric manufacturer that interchanges two fabrics on a sample card used by the interior decorator for a large hotel chain.