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

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References

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  1. C. F. J. Overhage, editor, Principles of Color Sensitometry (Society of Motion Picture and Television Engineers, New York1950); also M. H. Sweet, J. Opt. Soc. Am. 42, 232 (1952).
    [Crossref]
  2. (a) Evans, Hanson, and Brewer, Principles of Color Photography (John Wiley & Sons, Inc., New York, 1953), p. 364; (b)F. C. Williams and F. R. Clapper, J. Opt. Soc. Am. 43, 595 (1953).
  3. J. E. Pinney and W. F. Voglesong, Color Technology Division, Eastman Kodak Company (private communication).
  4. Kodak Dye Transfer Process (Eastman Kodak Company, Rochester, New York), Kodak Publication E-80.
  5. See reference 2(a), pp. 440–450.
  6. O. E. Miller and A. J. Sant, J. Opt. Soc. Am. 48, 479 (1958).

1958 (1)

O. E. Miller and A. J. Sant, J. Opt. Soc. Am. 48, 479 (1958).

Brewer,

(a) Evans, Hanson, and Brewer, Principles of Color Photography (John Wiley & Sons, Inc., New York, 1953), p. 364; (b)F. C. Williams and F. R. Clapper, J. Opt. Soc. Am. 43, 595 (1953).

Evans,

(a) Evans, Hanson, and Brewer, Principles of Color Photography (John Wiley & Sons, Inc., New York, 1953), p. 364; (b)F. C. Williams and F. R. Clapper, J. Opt. Soc. Am. 43, 595 (1953).

Hanson,

(a) Evans, Hanson, and Brewer, Principles of Color Photography (John Wiley & Sons, Inc., New York, 1953), p. 364; (b)F. C. Williams and F. R. Clapper, J. Opt. Soc. Am. 43, 595 (1953).

Miller, O. E.

O. E. Miller and A. J. Sant, J. Opt. Soc. Am. 48, 479 (1958).

Pinney, J. E.

J. E. Pinney and W. F. Voglesong, Color Technology Division, Eastman Kodak Company (private communication).

Sant, A. J.

O. E. Miller and A. J. Sant, J. Opt. Soc. Am. 48, 479 (1958).

Voglesong, W. F.

J. E. Pinney and W. F. Voglesong, Color Technology Division, Eastman Kodak Company (private communication).

J. Opt. Soc. Am. (1)

O. E. Miller and A. J. Sant, J. Opt. Soc. Am. 48, 479 (1958).

Other (5)

C. F. J. Overhage, editor, Principles of Color Sensitometry (Society of Motion Picture and Television Engineers, New York1950); also M. H. Sweet, J. Opt. Soc. Am. 42, 232 (1952).
[Crossref]

(a) Evans, Hanson, and Brewer, Principles of Color Photography (John Wiley & Sons, Inc., New York, 1953), p. 364; (b)F. C. Williams and F. R. Clapper, J. Opt. Soc. Am. 43, 595 (1953).

J. E. Pinney and W. F. Voglesong, Color Technology Division, Eastman Kodak Company (private communication).

Kodak Dye Transfer Process (Eastman Kodak Company, Rochester, New York), Kodak Publication E-80.

See reference 2(a), pp. 440–450.

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Figures (10)

Fig. 1
Fig. 1

Conversion from reflection density to effective transmission density for Dye Transfer prints.

Fig. 2
Fig. 2

Spectrophotometric curves of Dye Transfer near-neutrals fitted with the assumed dyes in END proportions. Curves obtained with interference filters on an electronic direct-reading reflection densitometer.

Fig. 3
Fig. 3

Chromaticity grid for single dyes and two-dye combinations of the Dye Transfer dyes obtained from identical matrices.

Fig. 4
Fig. 4

Contours of equal relative luminance for the dye combinations of Fig. 3.

Fig. 5
Fig. 5

Trilinear plot of the reflection END’s of the sample of Fig. 3.

Fig. 6
Fig. 6

Distance along the dye vectors of the chromaticity grid as a function of silver density of the separation negative, and the relation of these units to reflection END’s.

Fig. 7
Fig. 7

Sensitometric characteristics of gray scales accompanying the picture “Yellow Lady’s-Slipper.”

Fig. 8
Fig. 8

Trilinear plot of representative picture areas in the picture “Yellow Lady’s-Slipper.”

Fig. 9
Fig. 9

Sensitometric characteristics of gray scales accompanying the picture “Jamaican Boy.”

Fig. 10
Fig. 10

Trilinear plot of representative picture areas in the picture “Jamaican Boy.”

Equations (1)

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( C t M t Y t ) = ( 0.979 - 0.005 0 - 0.420 1.386 - 0.007 - 0.011 - 0.049 0.793 ) ( R t G t B t ) .