A “Retained Image Appearance” Metric For Full Tonal Scale, Colorimetric Evaluation Of Photographic Image Stability
Abstract:This paper describes a computational model based on CIELAB colorimetry and full tonal scale evaluation to define objective boundary conditions for “Retained Image Appearance” in a photograph where 100% retention equates to no visual change and 0% retention means total functional loss of image information content. The “Retained Image Appearance” model, I*, examines the color information (hue and chroma) and the black-and-white spatial information (lightness and contrast) in order to characterize the complete life cycle of a photograph as it ages with respect to color, contrast, and lightness. The I* model can also be used to compare tone reproduction accuracy between different renditions of a photographic image and may therefore have applicability in initial print or proof print quality studies as well.
Document Type: Research Article
Publication date: January 1, 2004
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