DICOM GSPS affects on contrast detection threshold

2010 ◽  
Author(s):  
David L. Leong ◽  
Tamara Miner Haygood ◽  
Gary J. Whitman ◽  
Selin Carkaci ◽  
Philip M. Tchou ◽  
...  
Keyword(s):  
Detection Threshold ◽  
Contrast Detection

scholarly journals Eccentricity dependence of orientation anisotropy of surround suppression of contrast-detection threshold

2018 ◽  
Vol 18 (7) ◽  
pp. 5 ◽  
Author(s):  
Menaka S. Malavita ◽  
Trichur R. Vidyasagar ◽  
Allison M. McKendrick
Keyword(s):  
Detection Threshold ◽  
Surround Suppression ◽  
Contrast Detection ◽  
Orientation Anisotropy

scholarly journals Trend of Contrast Detection Threshold with and without Localization

2013 ◽  
Vol 26 (6) ◽  
pp. 1099-1106 ◽  
Author(s):  
David L. Leong ◽  
Louise Rainford ◽  
Tamara Miner Haygood ◽  
Gary J. Whitman ◽  
William R. Geiser ◽  
...  
Keyword(s):  
Detection Threshold ◽  
Contrast Detection

Long-Lasting Detection Facilitation Induced by Gabor Flankers

Perception ◽  
1996 ◽  
Vol 25 (1_suppl) ◽  
pp. 155-155
Author(s):  
Y Tanaka ◽  
D Sagi
Keyword(s):  
Time Course ◽  
Detection Threshold ◽  
Stimulus Onset ◽  
Long Term Memory ◽  
High Contrast ◽  
Spatial Filters ◽  
Contrast Detection ◽  
Separation Threshold ◽  
Sensitivity Changes

Contrast detection threshold of a Gabor signal (GS) is enhanced in the presence of high contrast GS flankers. Repetitive performance of the task induces contrast sensitivity changes on different time scales: minutes when using mental imagery, and weeks in the context of perceptual learning. We tested the time course of lateral enhancement within a single trial, using a forward masking technique. Contrast detection thresholds were measured (2AFC) for a foveal GS target presented briefly (32 ms) preceded by a presentation (80 ms) of two high-contrast GS flankers, with stimulus onset asynchrony (SOA) varying from 0 to 3600 ms. Using target-to-mask separation of 3\lambda and 12\lambda (\lambda =18°, GS wavelength), we found that the 3\lambda separation GS flankers decreased target threshold by 0.25 log units at SOA=0 and by 0.17 log units at 3600 ms. At 12\lambda separation, threshold decreased by 0.11 log units at SOA=0 and by 0.14 log units at 3600 ms. Long-term and short-term enhancements showed similar dependence on stimulus configuration (maximal for collinear target and masks) and local parameters (orientation and spatial frequency differences between target and flankers). The results imply that spatial filters in early vision retain an input trace for as long as a few seconds (up to 14.4 seconds tested). This trace may subserve the consolidation of filter activity into long-term memory.

Effect of noise on the contrast detection threshold in visual perception

2006 ◽  
Vol 408 (2) ◽  
pp. 94-97 ◽  
Author(s):  
Hitoshi Sasaki ◽  
Masayoshi Todorokihara ◽  
Takuya Ishida ◽  
Junichiro Miyachi ◽  
Tahei Kitamura ◽  
...  
Keyword(s):  
Visual Perception ◽  
Detection Threshold ◽  
Contrast Detection

Spatiotemporal contrast detection threshold surface is bimodal

1979 ◽  
Vol 4 (1) ◽  
pp. 32 ◽  
Author(s):  
Jan J. Koenderink ◽  
Andrea J. van Doorn
Keyword(s):  
Detection Threshold ◽  
Contrast Detection

Detection threshold for electric shock in psychopaths.

1968 ◽  
Vol 73 (3, Pt.1) ◽  
pp. 268-272 ◽  
Author(s):  
Robert D. Hare
Keyword(s):  
Electric Shock ◽  
Detection Threshold
Sign in / Sign up

Export Citation Format

Share Document