Abstract

For a wide gamut of dye combinations for a reflection print material, equivalent neutral densitometry is shown to compare favorably with colorimetric measurements for the evaluation of color prints. Over a limited range of normal printing conditions, there is a linear relation between reflection density (END) and distance from the illuminant point along the vectors of a colorimetric dye grid.

Both neutral scale and picture-area densitometry offer advantages for the measurement of matched and rejected prints. It is necessary to bear in mind the possible limitations of neutral scale densitometry and to utilize picture area measurements for reproductions in which conditions vary considerably from “normal.”

© 1960 Optical Society of America

Objectives and Methods of Density Measurement in Sensitometry of Color Films*

Franklin C. Williams
J. Opt. Soc. Am. 40(2) 104-112 (1950)

Densitometry and Photographic Printing. Illumination of the Negative and Its Effect upon Density*

Clifton Tuttle
J. Opt. Soc. Am. 24(10) 272-278 (1934)

An Objective Method for Determination of Equivalent Neutral Densities of Color Film Images. III. Densitometer Calibrations*

F. H. Holland, R. S. Mickelson, and S. A. Powers
J. Opt. Soc. Am. 44(7) 534-539 (1954)

Formulation of Transparent Colors with a Digital Computer

F. W. Billmeyer, J. K. Beasley, and J. A. Sheldon
J. Opt. Soc. Am. 50(1) 70-72 (1960)

Fast Computing of Color Matching by Means of Matrix Manipulation, II. Reflection-Type Color Print

Noboru Ohta
J. Opt. Soc. Am. 62(1) 129-136 (1972)