Abstract

Color densitometers of certain types provide measurements which can be related to equivalent neutral densities of color film dye images. The calibration of three types of densitometers suitable for routine use is described and the system is evaluated for

  • 1. Accuracy of primary image calibration, and
  • 2. Degree to which routine densitometer measurements conform to the primary values.

Using this system, it has been possible to secure essentially identical equivalent neutral density values with different types of densitometers.

© 1954 Optical Society of America

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