title: Optimization of the gray scale for photoscanners: concise communication.
abstract: A gray scale providing easy visual interpretation of black-and-white photoscan transparencies was determined empirically from psychophysical studies conducted on 50 observers. This optimum gray scale provides equal visualization for equal countrate changes over the entire film range.
mesh_terms: D003720:Densitometry; D006801:Humans; D008722:Methods; D010781:Photography; D011601:Psychophysics; D011877:Radionuclide Imaging; D014796:Visual Perception