In the battle against outlaw robots, ever more sophisticated methods are being devised to ensure that some actions may only be performed by humans. Posting a comment on a blog requires some kind of puzzle to be solved, objects identified from a collection, or the deciphering of a deliberately confusing text.

We find ourselves in a position where computers are deciding whether we are human or not.

This work silently and efficiently provides continuous human detection with adjustable colour scale to best suit your furnishings.