Five high contrast (greater than 100:1) reflection test targets were investigated. The taregts were: (1) USAF 1951, (2) NBS Microcopy, (3) DIN German Standard, (4) RIT, and (5) a Hexagonal test target. The targets .were photo graphed at a reduction of 21X using a microcopying camera. Evaluation of resolving powers was made by the two research partners; independently. Analysis of the resultant data involved' a comparison of resolving power averages and variations for each target type. It was concluded that the five resolving power- targets do not perform similarly over the region investigated. Consistent variability could not be obtained between observers: with the RIT target. Different observers produced different average, resolving powers with the Hexagon target. Of the remaining three targets, correlation between any two of them was poor.

Library of Congress Subject Headings

Images, Photographic

Publication Date


Document Type


Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)


Sohumann, G.W.


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