Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Step brightness changes of distant mountain ridges and their perception

Not Accessible

Your library or personal account may give you access

Abstract

When successive ridges of distant mountains are seen, observers often report that, near the ridge where the brightness changes abruptly, the upper part of the nearer ridge appears darker than at its lower portions. Similarly, they report that the base of the more distant mountain seems brighter adjacent to the nearer ridge than on its upper portions. The explanation of this phenomenon, known as the step contrast effect, is a special case of Mach bands. It is usually attributed to a visual illusion involving lateral inhibition in the eye, which is most apparent in the vicinity of step brightness changes. Using analytic techniques and numerical integrations to simulate the airlight-induced brightness distributions of such scenes, we show that in many cases the perceived brightness distribution is qualitatively similar to the true brightness distribution and thus is not a visual illusion.

© 1991 Optical Society of America

Full Article  |  PDF Article
More Like This
Visibility of Distant Mountains as a Measure of Background Aerosol Pollution

William M. Porch, David S. Ensor, and Robert J. Charlson
Appl. Opt. 14(2) 400-403 (1975)

On the colors of distant objects

David K. Lynch and S. Mazuk
Appl. Opt. 44(27) 5737-5745 (2005)

Toying with the moon illusion

G. R. Lockhead and Myron L. Wolbarsht
Appl. Opt. 30(24) 3504-3507 (1991)

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 Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

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

Figures (8)

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

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

Equations (15)

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

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

Metrics

Select as filters


Select Topics Cancel
© Copyright 2022 | Optica Publishing Group. All Rights Reserved