Visible persistence: Effects of luminance, spatial frequency and orientation
| Autor: | Takehiro Ueno |
|---|---|
| Rok vydání: | 1983 |
| Předmět: |
Physics
Time Factors Light Rotation genetic structures Orientation (computer vision) business.industry Oblique case Grating Luminance Afterimage Sensory Systems Photometry Ophthalmology Optics Pattern Recognition Visual Space Perception Frequency characteristic Humans Spatial frequency business Persistence (discontinuity) |
| Zdroj: | Vision Research. 23:1687-1692 |
| ISSN: | 0042-6989 |
| DOI: | 10.1016/0042-6989(83)90184-0 |
| Popis: | Square-wave gratings of various space-average luminances, spatial frequencies and orientations were presented briefly to observers, who were asked to adjust a brief visual probe to coincide with the end of the longer-lasting, gradually decaying sensory trace of these stimuli. Visible persistence of 2 and 7 c/deg gratings increased with increasing luminance, and an interaction was found at approx. 6 cd/m2 between luminance and spatial frequency. The persistence curves showed a low-pass frequency characteristic at low mean luminance levels, whereas at high luminances, they presented a band-pass frequency characteristic. Persistence of a 7 c/deg grating was longer at oblique orientations than at horizontal or vertical orientations. These findings were related to properties of transient and sustained channels in human vision. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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