Abstract

Munsell matches were made to stimuli composed of a small focal area (subtense, 17′) and a larger surround (subtense, 3°). A fixed set of 36 proportions of two components (red light and incandescent-lamp light) in the focal area was matched in surround conditions that included five different proportions of the same two components and three large differences of luminance. In one surround condition only, the incandescent-lamp light was paired with green, blue, and purple components. A surround proportion of 98% red–50% incandescent gave the largest hue range in the matching samples for a fixed surround luminance. When surround luminance was increased beyond the maximum focal-area luminance, the hue range of the Munsell matches increased even farther. Of the pairs of components, the incandescent-blue combination yielded the largest hue range, but of low saturation, while the incandescent–green mixture gave the smallest range. Value and chroma differences among the Munsell matches are discussed.

© 1967 Optical Society of America

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