Abstract
The apparent contrast of suprathreshold grating targets was measured as a function of their spatial frequency and exposure duration. For targets of low spatial frequency, apparent contrast reaches a maximum at exposure durations of 80–100 msec relative to its value at shorter and longer durations. Contrast-duration curves thus resemble brightness-duration curves when the Broca-Sulzer effect is present. For gratings of higher spatial frequency, apparent contrast increases monotonically with duration. Thus, temporal contrast enhancement occurs only for low spatial frequency targets. The enhancement effect occurs foveally as well as for peripherally viewed targets, but it is abolished by decreasing the vertical extent of the grating.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
