Those who contacted me will get a copy, but this is the original paper
proposing CI as the measure of contrast for negative meterial. Your
librarian or document service dept should be able to help you obtain a
copy.
Niederpruem, C. J., Nelson, C. N, and Yule, J. A. C. 1966. Contrast
Index. Photogr. Sci. Engr., 10, 35-41.
Received on Mon Oct 3 13:01:01 2005
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