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Topic: Color gamut

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Gamut

Hexachrome

CMYK

Rotogravure

Image resolution

Lithography

Flexography

Block printing

Offset printing

Desktop publishing

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Printing press

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Limestone

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	Gamut - Wikipedia, the free encyclopedia
		Generally, the color gamut is specified in the hue-saturation plane, as many systems can produce colors with a wide range intensity within their color gamut; in addition, for subtractive color systems, such as printing, the range of intensity available in the system is for the most part meaningless outside the context of its illumination.
		Gamuts are commonly represented as areas in the CIE 1931 chromaticity diagram as shown at right, with the curved edge representing the monochromatic colors.
		The gamut of the CMYK color space is, ideally, approximately the same as that for RGB, with slightly different apexes, depending on both the exact properties of the dyes and the light source.
	en.wikipedia.org /wiki/Gamut (1641 words)

	Color management terminology - Support Knowledgebase (Site not responding. Last check: 2007-10-18)
		Color management is the process by which you try to match color conditions in a set of devices (e.g., scanner, monitor and printer).
		A reference color space is a device-independent theoretical color model used by a CMM (color engine) for translating colors from one device's gamut to another.
		This preserves the spectral relationship between colors and prevents "clipping," which is where distinctly different colors in one color space appear the same in the destination color space.
	www.adobe.com /support/techdocs/320624.html (1209 words)

	University Graphics -- About Color
		Color gamut is the range of color that can actually exist within any color model, for any particular device.
		A pre-defined color table included as part of the file controls the range of colors available and every color used in the image is "indexed" to this table.
		Spot color is another additive process color model where color is achieved using the pigment of inks, either singularly or in combination.
	www.montana.edu /commserv/csgraphics/ugcolor.html (2174 words)

	International Color Consortium
		In general, actual device color gamuts (the range of all possible colors which can be represented or produced on the device) will not be large enough to reproduce the desired color appearances communicated by the PCS values.
		The colorimetric rendering intents enable within gamut colors to be reproduced accurately (though possibly with compensation for the whiteness of the media) at the expense of out-of—gamut colors.
		For instance, the "desired" colors may be a close facsimile of the original, an aesthetic re-rendering of the original, or a simulation of a specific reproduction medium different from both the input and output media.
	www.color.org /profile.html (3545 words)

	creativepro.com - Out of Gamut: Why Is Color
		The color brown is no more inherent to a given pebble, say, than is the pain we might feel if that pebble struck us solidly in the forehead.
		Color is created by the interaction of three elements -- an illuminant (a light source), an object, and an observer (the person who experiences the color).
		The most accurate method we have of measuring the color behavior of objects and light sources is to record the amount of energy present at each wavelength of visible light.
	www.creativepro.com /story/feature/13036.html (1064 words)

	Color - SVG 1.1 - 20030114
		The color profile description is added to the user agent's list of known color profiles and then used to select the relevant profile.
		Out of gamut colors are converted to colors that have the same saturation but fall just inside the gamut.
		The user agent searches the color profile description database for a color profile description entry whose name descriptor matches and uses the last matching entry that is found.
	www.w3.org /TR/SVG/color.html (1478 words)

	Flexo Magazine - The Reproduction of Extended Gamut Colors for Flexographic Printing Using the Mechanism of the Munsell ...
		Once the extension of the gamut was quantifiable, the focus turned toward the inside of the gamut in an effort to accurately reproduce the neutral areas.
		Color management systems did account for some of the tonal value increase that was incurred with the printing of the IT8.7/3 targets.
		The color gamut for flexography could potentially be expanded even further through the application of additional refinements to the process.
	www.flexography.org /flexo/0900/092000b.cfm?ID=24 (1621 words)

	creativepro.com - Out of Gamut: Exploring Wide, Open (Color) Spaces
		In short, instead of limiting the gamut of the working color space to something close to what we can reproduce on output, the input-centric approach concentrates on using wide-gamut working spaces big enough to preserve all the color in the original.
		Obviously, you can't display colors on the monitor that the monitor is physically incapable of reproducing.
		The upshot of this is that when you view a wide gamut space on your monitor, you're looking through a small window in the center (approximately) of the wide gamut space.
	www.creativepro.com /story/feature/8582.html (1910 words)

	Color management and color science: Introduction
		These color primaries (shown on the left) have a curious property-- they have negative energy in portions of their spectra, i.e., they are not physically realizable.
		The colors may be the objects sensed by a scanner or produced by a printer or monitor.
		The heart of color management is the translation or gamut mapping between devices with different color gamuts and files with different color spaces.
	www.normankoren.com /color_management.html (3693 words)

	Color Space Fundamentals
		Although all colors of the visible spectrum can be produced by merging red, green and blue light, monitors are capable of displaying only a limited gamut (i.e., range) of the visible spectrum.
		Like monitors, printing inks also produce a color gamut that is only a subset of the visible spectrum, although the range is not the same for both.
		The chart to the left plots the visible color spectrum as the large "horse shoe" area, and within this is a plot of the CMYK colors, and the RGB colors.
	dx.sheridan.com /advisor/cmyk_color.html (633 words)

	Color management: Implementation part 1
		The colors in the above table are keyed to the simplified image flow diagram, below, as well as the table of color management settings for Picture Window Pro and the detailed image flow diagram in the Workflow summary in Implementation part 2.
		The gamuts of several color spaces are shown in the chart on the right, which has been adapted from Jonathan Sachs' Color Management tutorial.
		This minimizes color distortion when files are mapped with perceptual rendering intent; it also minimizes the risk of clipping out-of-gamut colors with relative colorimatric intent.
	www.normankoren.com /color_management_2.html (3168 words)

	Search for System Color Calibration
		The basic underlying problem is that of Color Gamut: the range of colors that a device is capable of displaying/printing.
		This color change is only to the screen image, not to the original data, and the amount of change is based on the Printing Inks Setup under the Color Preferences menu.
		A typical color management system consists of a program that creates "Device Profiles" which measure the color gamut and color response of each device individually (or, in specific combinations, but this is not preferred).
	www.scantips.com /basics15.html (939 words)

	Graphics Color Models
		Since a color model has a particular range of available color or gamut, it is referred to as using a "color space".
		The CMYK model forms its gamut from the primary subtractive colors of cyan, magenta and yellow.
		In the CMYK color model, colors are represented as percentages of cyan, magenta, yellow and fl.
	www.sketchpad.net /basics4.htm (1224 words)

	Photo Techniques Magazine - The Magazine dedicated to professional photographers interested in darkroom coverage, ... (Site not responding. Last check: 2007-10-18)
		The smaller gamuts are due to archival and watercolor papers, while the larger ones were obtained with semi-gloss and gloss photo papers.
		Gamut diagrams, along with a two-dimensional projection, are often used to compare the gamut or outermost color capability of devices.
		When the gamut is flattened in order to be shown as a projection, we lose this information, and the logical (but incorrect) conclusion is that the device with the larger gamut can reproduce all colors of the device with the smaller gamut.
	www.phototechmag.com /previous-articles/sample_article.htm (2160 words)

	efg's Chromaticity Diagrams Lab Report
		The 1-nm tabulations of the CIE color matching functions are given to seven significant figures.
		Visual color matching is far from being that precise." But with all this precision, and with a computer, the chromaticity coordinates can be computed directly from the color matching functions instead of using the separate tabulations as in the past.
		Showing the gamut correctly for various color spaces is usually not possible on a single display monitor since the gamuts are slightly different and some of the colors cannot be accurately represented.
	www.efg2.com /Lab/Graphics/Colors/Chromaticity.htm (2161 words)

	What Is Color?
		Both systems can reproduce a subset of all visible color, and while those subsets generally overlap, there are colors which can be reproduced with additive color and not with subtractive color and vise-versa.
		The "brightness" or "darkness" of a color, the amount of a brightness, light, or white in the color.
		The three defining colors of a color wheel, from which all other colors are built.
	www.devx.com /projectcool/Article/19954/0/page/3 (314 words)

	Printer, Digital Camera, and Scanner Color Gamuts
		These pages contain comparative color gamuts for a selection of the digital cameras, scanners, and printers and papers we have measured through our custom ICC printer profiling service.
		The plots display the color gamut of each printer, digital camera, or scanner in relation to Adobe RGB and sRGB.
		The gamut plots are 3-D VRML models, allowing you to examine the color range from any perspective.
	www.drycreekphoto.com /tools/printer_gamuts (202 words)

	Bergen County Camera - Digital Camera Color - Gamut (Site not responding. Last check: 2007-10-18)
		Your camera is sensitive to a range of colors called the gamut.
		If the object your taking a picture of has a color that lies outside the GAMUT of your camera, your camera automatically chooses a color that is close which lies inside the triangle.
		In the case of our deep purple Iris flowers the closest color happens to be a shade of blue.
	www.bergencountycamera.com /learn/digital_gamut.html (276 words)

	Electronic Publishing - A greater gamut
		I absolutely had to have something that was permanent, had a huge color gamut, and had high resolution because it had to rival my Iris.
		Epson added a seventh color, which is Light Black, and the pigmented inks have a much broader color gamut.
		From a distance, the human eye mixes the white area and the colored dots, and the brain interprets this as a light or medium shade.
	ep.pennnet.com /Articles/Article_Display.cfm?Section=Articles&Subsection=Display&ARTICLE_ID=148732 (2729 words)

	Flexo Magazine - Extending the Color Gamut
		The need to deliver high-speed, high-quality labels highlighting an expanded color gamut without the high cost of combination or multi-pass printing was the driving force behind two pioneering developments in flexo print: Hexachrome® and Opaltone®.
		Solid colors are rich and vibrant; skin tones are realistic; pastels and continuous-tone images are truer to the original.
		A powerful example of the expanded color gamut offered by Opaltone is the ability to achieve a clean orange or a saturated red without resorting to spot colors.
	www.flexography.org /flexo/article.cfm?ID=65 (1405 words)

	ScreenWeb \| Boosting Process-Color Ink Gamut with Fluorescents
		Poor purity of the cyan and magenta pigments is usually to blame for the shortcomings in the CMYK color gamut.
		In either case, the color is off from the ideal value and you must compensate accordingly in the separations.
		The colors most affected by the addition of fl are yellows, oranges, and light greens.
	www.screenweb.com /index.php/channel/1/id/1846 (1855 words)

	Tech Report: HPL-2000-50R1: Space Sensitive Color Gamut (Site not responding. Last check: 2007-10-18)
		Abstract: Gamut mapping is a method to modify a representation of a color image to fit into a constrained color space of a given rendering medium.
		A laser-jet color printer that attempts to reproduce a color image on a regular paper would have to map the photographed picture colors in a given color range, also known as the image 'color gamut', into the given printer/page color gamut.
		Most of the classical gamut mapping methods involve a pixel by pixel mapping and ignore the spatial color configuration.
	www.hpl.hp.com /techreports/2000/HPL-2000-50R1.html (223 words)

	ICC3D
		ICC3D (Interactive Color Correction in 3 Dimensions) is an application designed to help people understand and meet the challenges of color and image reproduction, especially gamut mapping.
		The tiff files illustrate the original image, as well as the result after the image has been mapped to the spectral gamut of a printer.
		Color transformations in 3D now perform several times faster.
	colorlab.hig.no /icc3d (178 words)

	Color Matching
		The color gamut of the device is displayed as a triangle on the chart.
		The color gamut triangle represents colors produced by the device.
		In the corners of triangle are the primary colors produced by the device.
	www.mediachance.com /pbrush/help/matching.html (1323 words)

	Cookbook - About Gamut
		While color monitors are only capable of displaying certain parts of the visible color spectrum, color dye pigments used in the printing process are capable of reproducing even fewer of those colors.
		Additionally, some of the colors produced by inks cannot be displayed on a monitor, and some colors displayed on a monitor are not reproducible using inks on paper.
		If you suspect a color to be a problem, many graphics programs will have a way to indicate that it is. In Photoshop you can use Gamut Warning in a number of ways to adjust problem areas.
	www.udel.edu /cookbook/scan-print/gamut.html (2106 words)

	FAQ - NexPress 2100 Color Gamut (Site not responding. Last check: 2007-10-18)
		Our system color gamut is wide enough to be fully compatible with SWOP and Euro.
		However, we have yet to finalize how this will be used in the marketplace, and will base our decisions once we gather sufficient input from customers and high volume applications.
		A: The NexPress 2100 inherent color gamut is larger than SWOP.
	www.nexpress.com /dyn/help/he030216.jsp (206 words)

	Color Reproduction Publications
		Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VII, 2002, SPIE Vol.
		Color Imaging: Device-Independent Color, Color Hardcopy, and Graphic Arts VI, Jan. 2001, San Jose, USA, SPIE Vol.
		Color Imaging: Device Independent Color, Color Hardcopy and Graphic Arts III, San Jose, SPIE Vol.
	diwww.epfl.ch /w3lsp/publications/colour (859 words)

	Wasatch Computer Technology, LLC
		How ICC profiles use the CIE Lab* color model to standardize color references.
		Output profiles are only half the battle in managing color.
		Physical limits to color output range for output devices.
	www.wasatchinc.com /digigrafix.html (87 words)

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