A method to assess the discrimination capability of a camera to measure small color differences is proposed. The method helps to fix the working conditions of the camera and analyzes the reliability of the measurements through comparison with a reference instrument. Attention is paid to the camera’s performance in the nearly neutral region of color space. The color differences are calculated using the Commission Internationale de l’Eclairage <i>L</i>*<i>a</i>*<i>b</i>* (CIELAB) Δ<i>E</i><sub><i>ab</i></sub>* and CIE 2000 color-difference formula metrics. The Sony DX-9100P 3CCD camera results are very close to those obtained by the Photo Research PR-715 spectroradiometer. Their absolute discrepancy is lower than the suprathreshold of visual discrimination (0.887 CIELAB unit).
© 2004 Optical Society of America
(040.0040) Detectors : Detectors
(040.1490) Detectors : Cameras
(120.5240) Instrumentation, measurement, and metrology : Photometry
(330.1710) Vision, color, and visual optics : Color, measurement
María S. Millán, Edison Valencia, and Montse Corbalán, "3CCD Camera’s Capability for Measuring Color Differences: Experiment in the Nearly Neutral Region," Appl. Opt. 43, 6523-6535 (2004)