Checker-Shadow: Same Gray, Different Lightness

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Curated archive entry based on published research. Two checker squares with equal measured luminance can appear different in lightness when one is interpreted as being in shadow. This describes a documented perceptual effect under the cited conditions, not an independent personal report or evidence that the underlying physical measurements changed.

SOURCE: https://pmc.ncbi.nlm.nih.gov/articles/PMC4666744/

TAGS: #curated #publishedresearch #perception

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