Quasi noise-free digital holography

(Changchun Institute of Optics, Fine Mechanics and Physics) Noise originating from the coherent nature of laser light is the scourge of digital holography, always causing holographic images to be of lower quality than conventional photographs. Now, Pasquale Memmolo of ISASI-CNR and co-workers have practically eliminated this noise by using a two-stage algorithm. The output obtained exhibited both qualitative and quantitative improvement over recently developed de-noising techniques. In particula...