Title

Absolute Identification Of Color For Targets Presented Against white And Colored Backgrounds

Date

1961

Index Abstract

Contrails and DTIC

Photo Quality

Not Needed

Report Number

WADD TR 60-611

Creator

Bishop, Harold P.

Crook, Mason N.

Corporate Author

Institute For Applied Experimental Psychology Tufts University

Laboratory

Behavioral Sciences Laboratory

Extent

48

Identifier

AD0266403

AD0266403

Access Rights

OTS

Distribution Classification

1

Contract

AF 33(616)-5087

DoD Project

7184

DoD Task

71580

DTIC Record Exists

No

Distribution Change Authority Correspondence

None

Report Availability

Full text available

Date Issued

1961-03

Abstract

The number of stimulus colors which can be absolutely identified by normal subjects when viewed against various colored backgrounds was investigated. Additive mixtures of light passed through narrow-band and Illuminant-C filters were projected onto a viewing screen by a device which permitted independent control of target and background characteristics. The stimulus parameters of hue, luminance, purity, target size, and target shape were varied, and the effects of such factors as training and the presence of a distracting task were studied. With target luminance above background luminance, about nine hues plus white, three luminance levels, and two purity levels, are estimated to be useful for operational coding, if no more than about 30 of the possible combinations are included in the set. Under optimal working conditions and with protracted training, the maximum size of an identifiable set is estimated to be about 60. Reduction of target luminance below the luminance of a colored background was found to make identification very difficult. No significant effect of target shape was found.

Provenance

IIT

Type

report

Subject

Colors

Identification

Vision

Targets

Distribution Conflict

No

Format

1 online resource