R P Penn

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The process of visual segmentation was studied by quantitatively estimating the apparent difference (i.e. the perceptual contrast) between two segments of a heterochromatic field. A chromatic test bar (Munsell 5R 6/6, 5BG 6/6, 5Y 6/6, or 5PB 6/6) was centered in an achromatic surround (Munsell N6) and the luminance contrast between the test bar and surround(More)
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