1. Visibility potential of a visual task as defined by the CIE
1.1 Visual reference tasks
A detailed description of the work carried out by the CIE (Commission Internationale de l'Éclairage) can be found in publications 19, 19/2.1 and 19/2.2. The most important concept adopted by the CIE is undoubtedly that of equivalence to the visibility threshold, since it is in relation to this threshold that the visibility level of a visual task can be defined.
Let's briefly review the principle of threshold visibility, based on the fundamental experiment that serves as a reference in this field. The CIE defines a relative contrast sensitivity curve (RCS Réf ) which is deduced from the threshold contrast values obtained from a simple experiment: 4 arc-minute luminous discs, presented close...
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Visibility potential of a visual task as defined by the CIE
Visual performance, relative visual performance
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