Abstract

A psychophysical investigation was carried out to determine the contrast threshold (represented by a density difference) for a spot on a photographic print with a uniform background density. Problems associated with determining a single value which is represenative of the existing density difference between the spot and surround, resulted from the inherent density variation of photographic print material. A series of eighty density difference measurements of the spot and immediatly adjacent surround are presented for prints which had 0, 50, and 100% frequencies of spot detection. A discussion concerning how the eye may be responding in this type of a situation is included.

Library of Congress Subject Headings

Photographic optics; Visual discrimination

Publication Date

1962

Document Type

Thesis

Student Type

Graduate

Advisor

Name(s) Illegible

Comments

Physical copy available from RIT's Wallace Library at TR220 .B46 1962

Campus

RIT – Main Campus

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