Digital Color Management: Principles and Strategies for the by Jan-Peter Homann

By Jan-Peter Homann

The ebook describes colour administration for the print construction with a spotlight on imposing criteria for separation, tender evidence, agreement evidence, facts supply and printing.

The fundamentals and techniques are distinct at establishing vendor-independent colour administration workflows which may simply be discovered with top purposes from e.g. Adobe, AGFA, GMG, Heidelberg, Kodak and X-Rite.

The writer explains with a different graphical thought how diverse criteria resembling ISO 12647, SWOP, GRACoL, G7, ICC profile structure and PDF/X healthy jointly.

He describes the details for constructing colour administration and quality controls from the print shopper over images, employer and pre-press to the printer. The e-book has a powerful specialize in verbal exchange among print client, photographer, service provider, pre-press and printers. in response to the easiest perform in conversation it explains the real steps for qc for electronic info, agreement proofs and prints.

"This very good booklet, now on hand in English for the 1st time, bargains an perception and sensible suggestion on all components of ICC colour administration. in addition to delivering information at the software of photograph arts workflows, it offers a historical past to paint conception that even the main skilled during this sector will locate useful." Paul Sherfield, The lacking Horse Consultancy

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Additional info for Digital Color Management: Principles and Strategies for the Standardized Print Production

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C=0 H a b C=15 – 0 0 H a b L 95 L 95 L 85 L 85 L 75 L 75 L 65 L 65 L 55 L 55 L 45 L 45 L 35 L 35 L 25 L 25 L 15 L 15 46 270° 0 –15 210° –13 –7 150° –13 7 90° 0 15 30° 13 7 330° 13 –7 C= 90 C=75 C= 60 C=30 H a b 270° 250° 230° 210° 190° 170° 150° 130° 110° 0 –10 –19 –26 –30 –30 –26 –19 –10 –30 –28 –23 –15 –5 5 15 23 28 90° 0 30 70° 10 28 50° 19 23 30° 26 15 10° 350° 330° 310° 290° 30 30 26 19 10 5 –5 –15 –23 –28 L 95 L 85 L 75 L 65 L 55 L 45 L 35 47 C= 45 C=30 C=15 C= 0 C= 45 H a b L 95 L 85 L 75 L 65 L 55 L 45 L 35 48 270° 0 –45 250° –15 –42 230° –29 –34 210° –39 –22 190° –44 –8 170° –44 –8 150° –39 22 130° –29 34 110° –15 42 90° 0 45 70° 15 42 50° 29 34 30° 39 22 10° 44 8 350° 44 –8 330° 39 –22 310° 29 –34 290° 15 –42 C= 90 C=75 C= 60 H a b 150° –52 30 130° –39 46 110° –21 56 90° 0 60 70° 21 56 50° 39 46 30° 52 30 10° 59 10 350° 59 –10 C= 60 L 95 L 85 L 75 L 65 L 55 L 45 H a b L 95 110° –26 70 90° 0 75 70° 26 70 50° 48 57 30° 65 37 10° 74 13 350° 74 –13 C=75 L 85 L 75 C= 90 L 65 H a b L 55 L 95 L 45 L 85 90° 0 90 49 Lightness in the LCH/Lab Color Spaces The illustrations on the right show the levels of equal lightness in the LCH/Lab color spaces.

The resulting planes show all the colors of a saturation level that can be reproduced in four-color offset printing. For a more exact description of the colors, they have been given their LCH/Lab co-ordinates. C=0 H a b C=15 – 0 0 H a b L 95 L 95 L 85 L 85 L 75 L 75 L 65 L 65 L 55 L 55 L 45 L 45 L 35 L 35 L 25 L 25 L 15 L 15 46 270° 0 –15 210° –13 –7 150° –13 7 90° 0 15 30° 13 7 330° 13 –7 C= 90 C=75 C= 60 C=30 H a b 270° 250° 230° 210° 190° 170° 150° 130° 110° 0 –10 –19 –26 –30 –30 –26 –19 –10 –30 –28 –23 –15 –5 5 15 23 28 90° 0 30 70° 10 28 50° 19 23 30° 26 15 10° 350° 330° 310° 290° 30 30 26 19 10 5 –5 –15 –23 –28 L 95 L 85 L 75 L 65 L 55 L 45 L 35 47 C= 45 C=30 C=15 C= 0 C= 45 H a b L 95 L 85 L 75 L 65 L 55 L 45 L 35 48 270° 0 –45 250° –15 –42 230° –29 –34 210° –39 –22 190° –44 –8 170° –44 –8 150° –39 22 130° –29 34 110° –15 42 90° 0 45 70° 15 42 50° 29 34 30° 39 22 10° 44 8 350° 44 –8 330° 39 –22 310° 29 –34 290° 15 –42 C= 90 C=75 C= 60 H a b 150° –52 30 130° –39 46 110° –21 56 90° 0 60 70° 21 56 50° 39 46 30° 52 30 10° 59 10 350° 59 –10 C= 60 L 95 L 85 L 75 L 65 L 55 L 45 H a b L 95 110° –26 70 90° 0 75 70° 26 70 50° 48 57 30° 65 37 10° 74 13 350° 74 –13 C=75 L 85 L 75 C= 90 L 65 H a b L 55 L 95 L 45 L 85 90° 0 90 49 Lightness in the LCH/Lab Color Spaces The illustrations on the right show the levels of equal lightness in the LCH/Lab color spaces.

This correction or calibration ensures that the device’s color reproduction conforms to a set specification. Because the color reproduction is dependent upon the device as well as the printing medium, there are different target values for high-quality printing systems, especially digital proof systems, for various printing media with different target values for calibration and linearization. So, if different printing media are to be used with the same proof system then each individual one must be calibrated.

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