An environment to derive colorimetric tolerances of images was established and an experiment using this new environment was performed. This environment allows for images to be digitally captured, colorimetrically manipulated, displayed, observed, and statistically evaluated. The visual experiment measured perceptibility and acceptability colorimetric tolerances for images using paired comparison techniques. Thirty-two observers judged six typical photographic scenes displayed on a high resolution color monitor. These scenes were manipulated using ten linear and nonlinear functions in the CIELAB dimensions of lightness, chroma, and hue angle. The tolerances were determined using probit analysis. It was found that scene content did not significantly affect the tolerances. The CIELAB, CMC, and MCSL color difference equations were shown to be inadequate for accurately modeling image tolerances. Finally, possible applications of this work are described.
Library of Congress Subject Headings
Image processing--Digital techniques; Colorimetric analysis
Department, Program, or Center
Chester F. Carlson Center for Imaging Science (COS)
Stokes, Mike, "Colorimetric tolerances of digital images" (1991). Thesis. Rochester Institute of Technology. Accessed from
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