English: Frederic Eugene Ives (1856-1937) inserting a Kromogram into his Kromskop, circa 1899. The Ives Kromskop (pronounced "chrome-scope" and known generically as a chromoscope or photochromoscope) was a device used to view Kromograms, specially mounted sets of three black-and-white photographs taken through red, green and blue filters. It used corresponding colored glass filters to appropriately illuminate each photograph and transparent reflectors to visually combine them into a single full-color image. A monoscopic (2-D) "Junior Kromskop" is shown. The more common stereoscopic (3-D) model was standard.