Invisible flash- take pics in dark

Invisible Flash sheds new light on photography in the dark
As technology becomes available to help those wishing to avoid the annoying flash photography of the paparazzi get some payback, researchers Dilip Krishnan and Rob Fergus from New York University have developed a system for taking dazzle-free photos in poor lighting conditions which could result in celebs not even knowing they're being photographed. Named dark light flash photography by its creators, the system uses light waves beyond our visible range and special software and algorithms to produce photos comparable in quality to a long exposure shot.

Photos taken using the dark flash produce images that don't match the colors of our visual experience, producing a slightly green-tinted monochrome effect similar to something seen using night vision. So two images are recorded in quick succession (limited only by the camera's 3 frames/sec rate), one recording the dark flash spectrum and the other ambient light frequencies in the visible range.

Other methods and applications
In developing this system other solutions for non-invasive low light photography were examined, including heavy and expensive wide aperture lenses, anti-shake hardware that can help reduce image blur and numerous de-noising techniques.

Read more at: http://www.gizmag.com/dark-flash-photography-research/12422/