Today’s invention is an augmented reality application which allows a group of people conducting a search to collaborate more effectively (They might be scanning an area for hidden explosives or searching for evidence in connection with some crime, for example).
Each user wears a set of glasses which knows its position and orientation and projects a bright, individually coloured patch of light onto the surfaces he is looking at. Everone’s glasses also contain a camera which detects and tracks his coloured patch.
The information about those areas which have been inspected, by anyone in the group, is pooled and obscured in everyone’s field of view.
For a more thorough scrutiny, it might be arranged that each patch of space need be independently inspected by say two people before being obscured.