Lightness in a Flash: Effect of Exposure Time on Lightness Perception
A gray target can appear lighter or darker depending on its surrounding spatial context. We examined the effect of exposure time on three such examples (simultaneous lightness contrast, dungeon illusion, and the two-room arrangement), finding very different results with exposure time as brief as 15...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2020-12-01
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| Series: | i-Perception |
| Online Access: | https://doi.org/10.1177/2041669520983830 |
| _version_ | 1818615947614748672 |
|---|---|
| author | Sae Kaneko Alan Gilchrist |
| author_facet | Sae Kaneko Alan Gilchrist |
| author_sort | Sae Kaneko |
| collection | DOAJ |
| description | A gray target can appear lighter or darker depending on its surrounding spatial context. We examined the effect of exposure time on three such examples (simultaneous lightness contrast, dungeon illusion, and the two-room arrangement), finding very different results with exposure time as brief as 15 ms: the simultaneous lightness contrast was much stronger, the effect of the dungeon illusion was reversed, and the lightness difference between the two isoluminant patches in the two-room arrangement disappeared. These suggest that local luminance ratios dominate lightness perception in a brief flash. |
| first_indexed | 2024-12-16T16:42:00Z |
| format | Article |
| id | doaj.art-d47030bb12954d4dbd83ee96e64c3b7d |
| institution | Directory Open Access Journal |
| issn | 2041-6695 |
| language | English |
| last_indexed | 2024-12-16T16:42:00Z |
| publishDate | 2020-12-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | i-Perception |
| spelling | doaj.art-d47030bb12954d4dbd83ee96e64c3b7d2022-12-21T22:24:16ZengSAGE Publishingi-Perception2041-66952020-12-011110.1177/2041669520983830Lightness in a Flash: Effect of Exposure Time on Lightness PerceptionSae KanekoAlan GilchristA gray target can appear lighter or darker depending on its surrounding spatial context. We examined the effect of exposure time on three such examples (simultaneous lightness contrast, dungeon illusion, and the two-room arrangement), finding very different results with exposure time as brief as 15 ms: the simultaneous lightness contrast was much stronger, the effect of the dungeon illusion was reversed, and the lightness difference between the two isoluminant patches in the two-room arrangement disappeared. These suggest that local luminance ratios dominate lightness perception in a brief flash.https://doi.org/10.1177/2041669520983830 |
| spellingShingle | Sae Kaneko Alan Gilchrist Lightness in a Flash: Effect of Exposure Time on Lightness Perception i-Perception |
| title | Lightness in a Flash: Effect of Exposure Time on Lightness Perception |
| title_full | Lightness in a Flash: Effect of Exposure Time on Lightness Perception |
| title_fullStr | Lightness in a Flash: Effect of Exposure Time on Lightness Perception |
| title_full_unstemmed | Lightness in a Flash: Effect of Exposure Time on Lightness Perception |
| title_short | Lightness in a Flash: Effect of Exposure Time on Lightness Perception |
| title_sort | lightness in a flash effect of exposure time on lightness perception |
| url | https://doi.org/10.1177/2041669520983830 |
| work_keys_str_mv | AT saekaneko lightnessinaflasheffectofexposuretimeonlightnessperception AT alangilchrist lightnessinaflasheffectofexposuretimeonlightnessperception |