Abstract

Several small test colors were varied in size and shape to discover possible effects on their color appearance. Color appearance was evaluated calorimetrically with a binocular septum viewer; the test color was viewed with one eye under the given conditions and matched with a variable mixture presented to the other eye under standard conditions. Increasing the area of the test colors from 25 to 500 sq min of visual angle evoked some significant increases in saturation and characteristic shifts in hue. These changes in perceived color were found to be independent of marked changes in rectangular shape. The observed changes are related to small area tritanopia.

© 1953 Optical Society of America

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