COLOR GAMUT MAPPING AND THE PRINTING OF DIGITAL COLOR IMAGES
COLOR GAMUT MAPPING AND THE PRINTING OF DIGITAL COLOR IMAGES
COLOR GAMUT MAPPING AND THE PRINTING OF DIGITAL COLOR IMAGES
COLOR GAMUT MAPPING AND THE PRINTING OF DIGITAL COLOR IMAGES
XEROX PARC, EDL-88-1, APRIL 1988
XEROX PARC, EDL-88-1, APRIL 1988
Plate I: An example of calibrated and uncalibrated reproduction. (a) Calibrated image, courtesy of Cornell University. The colors in the chart are correct. (b) Uncalibrated reproduction of the same image. The colors in the chart are incorrect.
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Plate II: Halftone pattern for four color offset printing showing rotated screens.
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Plate III: Chart for testing the effects of GCR, TRC and gray balancing. Chart contains tone and step wedges, sampled printer gamut and solid primary patches.
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Plate IV. Two orthographic views of the gamut of an ideal color monitor specified in the tristimulus coordinate system, XYZ. (a) Y, Z as shown, X positive out of the paper (b) X, Y as shown, Z positive out of the paper.
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Plate V. Two orthographic views of the gamut of the Cromalin proof specified in the tristimulus coordinate system, XYZ. (a) Y, Z as shown, X positive out of the paper (b) X, Y as shown, Z positive out of the paper.
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Plate VI. Two orthographic views of the gamut of the thermal transfer printer specified in the tristimulus coordinate system, XYZ. (a) Y, Z as shown, X positive out of the paper (b) X, Y as shown, Z positive out of the paper.
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Plate VII. Gamuts of the Cromalin proof and a typical color monitor overlaid on the CIE chromaticity diagram. The horseshoe shaped plot is the spectrum locus; that is, its interior contains all observable colors defined as tristimulus values.
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Plate VIII (b)
Plate VIII (a): Reproduction showing effects of bs and csf. (b) Same image with no bs. Note the improved contrast. Original image synthesized by Rikk Carey, Cornell University.
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Plate IX: (a) Image of the Munsell color solid with the gamut mapping shown in Figure 7(d). (b): Same image after the umbrella transform shown in Figure 9. Original image from Cornell University.
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Plate X: Illustration produced with an interactive design system. The colors were selected using an interactive color selection tool.
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Plate XI (a): Screen view of the calibrated color selection tool. (b) Calibrated color tool displaying a color that is outside of the printing gamut, as indicated by the blue flag. Note that the monitor color will be approximated in this figure, however.