Color Correction with Colored Couplers*

Hanson, W. T.

doi:10.1364/josa.40.000166

Cited by 18 publications

(2 citation statements)

References 3 publications

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“…148 In practice, the measurements are taken of a narrow band of wavelengths as indicated in Figures 7-9. 149 In the case when ideal spectral absorption by image dyes cannot be achieved, a color correction method called color masking [150][151][152][153][154] is employed to "cover up" these deficencies when making color reproductions from color negatives. The use of colored couplers in color negative films in combination with colorless couplers has solved many of the problems related to nonideal absorption.…”

Section: Emulsion Chemicalsmentioning

confidence: 99%

Chemistry and Processes of Color Photography

Theys

Sosnovsky

1997

Chem. Rev.

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Section: Emulsion Chemicalsmentioning

confidence: 99%

Chemistry and Processes of Color Photography

Theys

Sosnovsky

1997

Chem. Rev.

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“…1) are usually given by the cyan dye in the medium wavelengths, and by the magenta dye in the short wavelengths. The yellow dye, on the other hand, generally does not exhibit strong side absorptions [6].…”

Section: Chromogenic Film and Dye Fadingmentioning

confidence: 99%

Dye purification: an image-processing technique for the digital restoration of chromogenic film

Trumpy

Flückiger

2018

2018 Colour and Visual Computing Symposium (CVCS)

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The majority of color film heritage shot between the 1940s and the 1980s is faded. The bleaching of dyes cannot be reversed with chemical methods. Digital technologies can provide the means to recover faded colors. Still, the result of the digital unfading depends on the amount of residual color present in the film, the quality of the image capture operation, and the efficacy of the digital image processing. This paper first discusses the strategies to best capture the residual color information in the film, and then presents a processing method that consistently improves the digital restoration of the most common type of fading: the bleaching of the cyan dye that results in the typical pinkish cast of historical photographs.

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Color Photography

Kapecki

Rodgers

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Color photography is the technology by which the visual appearance of a three‐dimensional subject may be reproduced on a two‐dimensional surface having a pleasing balance of brightness, hue, and color. Light capture is primarily effected by silver halide crystals. Integral tri‐color film packs also contain spectral sensitizing dyes and colored masking couplers appropriate to the subtractive primary dyes, filters, and an overcoat. The chromogenic chemistry of the color photography process involves the reactions of p ‐phenylenediamine developers and various couplers. Prototype dye couplers, which often contain an organic ballast to enhance solubility in hydrophobic solvents, colored masking couplers, and development‐inhibitor‐releasing couplers, which carry a silver development inhibitor linked to the film coupling site, are given. Both chromogenic and post‐development film chemistries are described as are the relationships between film speed, light sensitivity, dye stability, image structure, and color reproduction.

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Color Correction with Colored Couplers*

Cited by 18 publications

References 3 publications

Chemistry and Processes of Color Photography

Chemistry and Processes of Color Photography

Dye purification: an image-processing technique for the digital restoration of chromogenic film

Color Photography

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