Abstract

Modulation thresholds have been measured for sine-wave gratings at various spatial frequencies. At low frequencies, the threshold is determined in part by the gradient between adjacent bright and dark bars. This is related to the effect of blurring the border between the bright and dark halves of a bipartite field; the results obtained with a sine-wave grating have been compared to the results obtained with a single border. An attempt has been made to isolate the roles played by optical blur and physiological spread of excitation and inhibition.

© 1969 Optical Society of America

Full Article  |  PDF Article

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (14)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (17)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription