just-perceptible difference

just-perceptible difference

[′jəst pər′sep·tə·bəl ′dif·rəns]
(psychology)
The smallest difference between luminances or colors of areas, usually adjacent to each other, that can be discerned by careful observation under the most favorable conditions. Abbreviated jpd.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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