Before I jump into this project, I was curious if anyone has attempted this concept yet?
It is similar to the City Wall project, during its ‘day-mode’.
-Array of LEDs surrounding surface on edges, slightly raised above the surface and all angled downward to the surface.
-The cameras would be set to highcontrast for a higher threshold of detection, and if I can figure it out, stitch each image together to obtain higher resolution. I suppose a second concept would be to point each camera to the center and overlay each camera image ontop of eachother, to increase accuracy of touch location on the surface by comparing each image, similar to our eyes and depth perception-- I don’t know if this would increase ‘touch resolution’(is there a term for this?)
-The projector would probably be placed further away and use a mirror to reflect onto surface.
-Underneath surface would be projectors material to collect light and show image.
-Surface would probably be acrylic, or possibly just glass.
concept: Cameras underneath recording activity, however they would be set to see only darkness on the surface-- the camera would normally be flooded with the iR light, and when an object was close to the surface, the dimming of light would be considered a blob. This is a bit of a reverse of normal DI, but I think might be more accurate in determining where the actual fingers are placed and not hovering, as it would presumably result in zero iR transmittance underneath the finger when contacting surface.
Please see the picture for my diagram
Questions, comments, criticism welcome!