The setup I hope to achieve would be some filter/illumination system that will allow me to pick up infrared light from some illumination source (IR LED ring or similar) and only light from that source, in daylight.
This will be used inside a building, however there will be windows allowing in daylight.
The idea is to only pick up objects close to the camera by them reflecting light from the IR illumination source, and anything in the background to be cut from the image. (like a depth camera)
My question is if there is a filter that exists that can be tuned for certain precise wavelengths (that do not appear in usual sunlight) and can be projected from a non-natural light source, or any other equipment that could be used to achieve this result.
I understand the concepts of active and passive IR light sources in very basic terms, however I would not know if choosing one of these would be better suited to such a situation?