Abstract

Image sampling effects have been variously quantified as aliased signal, spatial signal, and spatial noise. However, a relationship between these characteristics and human object recognition has not been established in a coherent, mathematical form. We present a heuristic study that characterizes the performance degradation that is due to the spurious response of a sampled imaging system as an effective increase in system blur. A character recognition experiment was performed in which 20 observers responded to 3500 character pairs of blur and sample spacing. A baseline was created where the probability of character recognition was determined as a function of blur without sampling. The sampled characters were then compared with this baseline so that the effect of sampling on character recognition could be determined. Finally, an increase in blur was established as a function of spurious response, which describes the overall effect of sampling on observer character recognition.

© 1999 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Performance comparison of rectangular (four-point) and diagonal (two-point) dither in undersampled infrared focal plane array imagers

Keith Krapels, Ronald Driggers, Richard Vollmerhause, and Carl Halford
Appl. Opt. 40(1) 71-84 (2001)

Effects of sampling on the phase transfer function of incoherent imaging systems

Vikrant R. Bhakta, Manjunath Somayaji, and Marc P. Christensen
Opt. Express 19(24) 24609-24626 (2011)

Target-acquisition performance in undersampled infrared imagers: static imagery to motion video

Keith Krapels, Ronald G. Driggers, and Brian Teaney
Appl. Opt. 44(33) 7055-7061 (2005)

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 (18)

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

Metrics

You do not have subscription access to this journal. Article level metrics 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