Just-noticeable differences in atmospheric haze.

Full Abstract

This article examines the only available experimental data taken in the natural environment on the ability of an observer to perceive small, incremental changes in the colorfulness of objects seen through atmospheric haze and estimates an appropriate just-noticeable difference (JND) from these data. This experimentally determined threshold of perception is compared to changes in the deciview scale. Based on these experimental results, the deciview scale is found to not be uniform over a wide range of visibility conditions, as has been previously claimed. In addition, a 1-deciview change never produces a perceptible change in haze, as defined by a 95% probability of producing a measurable change in the colorfulness of an object seen through the haze.

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Author information

Author/s: Henry, Ronald C (RC);

Affiliation: Department of Civil and Environmental Engineering, University of Southern California, Los Angeles 90089-2531, USA. rhenry(-atsign-)usc.edu

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Journal of the Air & Waste Management Association (1995) (J Air Waste Manag Assoc), published in United States. (Language: eng)

Reference: 2002-Oct; vol 52 (issue 10) : pp 1238-43

Dates: Created 2002/11/06; Completed 2002/11/19; Revised 2006/11/15;

PMID: 12418734, status: MEDLINE (last retrieval date: 11/6/2008)

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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Associated Chemicals: Air Pollutants (0)

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