Misperceived Luminance Gradients in an Hourglass Illusion
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ArticlePublication details: sage 2019Description: Vol 48, Issue 8, 2019 : (752-756 p.)Subject(s): Online resources:
In:
PerceptionSummary: A square contains a linear luminance gradient from white at the top to black at the bottom. Pinching this in at the waist forms an hourglass figure of two tip-to-tip triangles. The pinch reduces the perceptual gradient within each triangle, making the pale upper triangle and the dark lower triangle both look more uniform in brightness We attribute this to undersampling of the mid-greys.
| Item type | Current library | Collection | Call number | Vol info | Status | Date due | Barcode | Item holds | |
|---|---|---|---|---|---|---|---|---|---|
E-Journal
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Library, SPAB | E-Journals | v. 48(1-12) / Jan-Dec. 2019 | Available |
Total holds: 0
A square contains a linear luminance gradient from white at the top to black at the bottom. Pinching this in at the waist forms an hourglass figure of two tip-to-tip triangles. The pinch reduces the perceptual gradient within each triangle, making the pale upper triangle and the dark lower triangle both look more uniform in brightness We attribute this to undersampling of the mid-greys.
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