Evaluating Color Gamut of Smartphone Display
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Expanded Gamut Shoot-Out: Real Systems, Real Results
Expanded Gamut Shoot-Out: Real Systems, Real Results Abhay Sharma Click toRyerson edit Master University, subtitle Toronto style Advisors Roger Breton, Marc Levine, John Seymour, Bill Pope Comprehensive Report – 450+ downloads tinyurl.com/ExpandedGamut Agenda – Expanded Gamut § Why do we need Expanded Gamut? § What is Expanded Gamut? (CMYK-OGV) § Use cases – Spot Colors vs Images PANTONE 109 C § Printing Spot Colors with Kodak Spotless (KSS) § Increased Accuracy § Using only 3 inks § Print all spot colors, without spot color inks § How do I implement EG? § Issues with Adobe and Pantone § Flexo testing in 2020 Vendors and Participants Software Solutions 1. Alwan – Toolbox, ColorHub 2. CGS ORIS – X GAMUT 3. ColorLogic – ColorAnt, CoPrA, ZePrA 4. GMG Color – OpenColor, ColorServer 5. Heidelberg – Prinect ColorToolbox 6. Kodak – Kodak Spotless Software, Prinergy PDF Editor § Hybrid Software - PACKZ (pronounced “packs”) RIP/DFE § efi Fiery XF (Command WorkStation) – Epson P9000 § SmartStream Production Pro – HP Indigo 7900 Color Management Solutions § X-Rite i1Profiler Expanded Gamut Tools § PANTONE Color Manager, Adobe Acrobat Pro, Adobe Photoshop Why do we need Expanded Gamut? - because imaging systems are imperfect Printing inks and dyes CMYK color gamut is small Color negative film What are the Use Cases for Expanded Gamut? ✓ 1. Spot Colors 2. Images PANTONE 301 C PANTONE 109 C Expanded gamut is most urgently needed in spot color reproduction for labels and package printing. Orange, Green, Violet - expands the colorspace Y G O C+Y M+Y -
NEC Multisync® PA311D Wide Gamut Color Critical Display Designed for Photography and Video Production
NEC MultiSync® PA311D Wide gamut color critical display designed for photography and video production 1419058943 High resolution and incredible, predictable color accuracy. The 31” MultiSync PA311D is the ultimate desktop display for applications where precise color is essential. The innovative wide-gamut LED backlight provides 100% coverage of Adobe RGB color space and 98% coverage of DCI-P3, enabling more accurate colors to be displayed on screen. Utilizing a high performance IPS LCD panel and backed by a 4 year warranty with Advanced Exchange, the MultiSync PA311D delivers high quality, accurate images simply and beautifully. Impeccable Image Performance The wide-gamut LED LCD backlight combined with NEC’s exclusive SpectraView Engine deliver precise color in every environment. • True 4K resolution (4096 x 2160) offers a high pixel density • Up to 100% coverage of Adobe RGB color space and 98% coverage of DCI-P3 • 10-bit HDMI and DisplayPort inputs display up to 1.07 billion colors out of a palette of 4.3 trillion colors Ultimate Color Management The sophisticated SpectraView Engine provides extensive, intuitive control over color settings. • MultiProfiler software and on-screen controls provide access to thousands of color gamut, gamma, white point, brightness and contrast combinations • Internal 14-bit 3D lookup tables (LUTs) work with optional SpectraViewII color calibration solution for unparalleled color accuracy A Perfect Fit for Your Workspace A Better Workflow Future-proof connectivity, great ergonomics, and VESA mount Exclusive, -
Accurately Reproducing Pantone Colors on Digital Presses
Accurately Reproducing Pantone Colors on Digital Presses By Anne Howard Graphic Communication Department College of Liberal Arts California Polytechnic State University June 2012 Abstract Anne Howard Graphic Communication Department, June 2012 Advisor: Dr. Xiaoying Rong The purpose of this study was to find out how accurately digital presses reproduce Pantone spot colors. The Pantone Matching System is a printing industry standard for spot colors. Because digital printing is becoming more popular, this study was intended to help designers decide on whether they should print Pantone colors on digital presses and expect to see similar colors on paper as they do on a computer monitor. This study investigated how a Xerox DocuColor 2060, Ricoh Pro C900s, and a Konica Minolta bizhub Press C8000 with default settings could print 45 Pantone colors from the Uncoated Solid color book with only the use of cyan, magenta, yellow and black toner. After creating a profile with a GRACoL target sheet, the 45 colors were printed again, measured and compared to the original Pantone Swatch book. Results from this study showed that the profile helped correct the DocuColor color output, however, the Konica Minolta and Ricoh color outputs generally produced the same as they did without the profile. The Konica Minolta and Ricoh have much newer versions of the EFI Fiery RIPs than the DocuColor so they are more likely to interpret Pantone colors the same way as when a profile is used. If printers are using newer presses, they should expect to see consistent color output of Pantone colors with or without profiles when using default settings. -
Light and Color
Chapter 9 LIGHT AND COLOR What Is Color? Color is a human phenomenon. To the physicist, the only difference be- tween light with a wavelength of 400 nanometers and that of 700 nm is Different wavelengths wavelength and amount of energy. However a normal human eye will see cause the eye to see another very significant difference: The shorter wavelength light will different colors. cause the eye to see blue-violet and the longer, deep red. Thus color is the response of the normal eye to certain wavelengths of light. It is nec- essary to include the qualifier “normal” because some eyes have abnor- malities which makes it impossible for them to distinguish between certain colors, red and green, for example. Note that “color” is something that happens in the human seeing ap- Only light itself paratus—when the eye perceives certain wavelengths of light. There is causes sensations of no mention of paint, pigment, ink, colored cloth or anything except light color. itself. Clear understanding of this point is vital to the forthcoming discus- sion. Colorants by themselves cannot produce sensations of color. If the proper light waves are not present, colorants are helpless to produce a sensation of color. Thus color resides in the eye, actually in the retina- optic-nerve-brain combination which teams up to provide our color sen- Color vision is sations. How this system works has been a matter of study for many years complex and not and recent investigations, many of them based on the availability of new completely brain scanning machines, have made important discoveries. -
The Printer's Guide to Expanded Gamut
DISTRIBUTED BY TECHKON USA February 2017 THE PRINTER’S GUIDE TO EXPANDED GAMUT Understanding the technology landscape and implementation approach By Ron Ellis Printer’s Guide to Expanded Gamut Page | 1 Printer’s Guide to Expanded Gamut Whitepaper By Ron Ellis Table of Contents What is Expanded Gamut ............................................................................................................... 4 ......................................................................................................................................................... 5 Why Expanded Gamut .................................................................................................................... 6 The Current Expanded Gamut Landscape ...................................................................................... 9 Standardization and Expanded Gamut ......................................................................................... 10 Methods of Producing Expanded Gamut...................................................................................... 11 Techkon and Expanded Gamut ..................................................................................................... 11 CMYK expanded gamut ................................................................................................................. 12 The CMYK Expanded Gamut Workflow ........................................................................................ 16 Conversion from source to CMYK Expanded gamut .................................................................... -
Monitor Color Gamut What Does “Percent of NTSC” Mean?
Technical white paper Monitor color gamut What does “percent of NTSC” mean? What is color gamut? With rare exceptions, all LCD monitors operate by presenting just three primary colors to the eye: red, green and blue. All the colors you can see on the monitor are actually different blends of the three primaries. This works because of the way the human eye works. The complete set of colors that a monitor can present is called the “native color gamut”, and is determined by the exact colors of the three primaries. Different monitors have slight (or not so slight) differences in the three primaries. These differences are a consequence of the technologies used in the LCD panel and the backlight, and sometimes of the age of the unit. There are two diagrams commonly used for representing how color gamuts relate to the set of all colors visible to the human eye. These are called “chromaticity” diagrams. The first (left), which is commonly used, is the “CIE 1931” diagram, which uses the coordinates x and y. The second diagram (right), which is newer (and, actually, a better representation of how we perceive color) is the “CIE 1976 UCS” diagram, which uses the coordinates u’ and v’ (called “u prime” and “v prime”). Any three-primary color gamut for a monitor can be plotted on these diagrams as a triangle of which the vertices are the exact colors of the red, green and blue primaries. The NTSC color space There are many standard three-primary color spaces used in the industry. The NTSC color space, defined in 1953, is, however, not commonly used, as no displays at the time had primaries which matched it. -
Comparing Measures of Gamut Area
Comparing Measures of Gamut Area Michael P Royer1 1Pacific Northwest National Laboratory 620 SW 5th Avenue, Suite 810 Portland, OR 97204 [email protected] This is an archival copy of an article published in LEUKOS. Please cite as: Royer MP. 2018. Comparing Measures of Gamut Area. LEUKOS. Online Before Print. DOI: 10.1080/15502724.2018.1500485. PNNL-SA-132222 ▪ November 2018 COMPARING MEASURES OF GAMUT AREA Abstract This article examines how the color sample set, color space, and other calculation elements influence the quantification of gamut area. The IES TM-30-18 Gamut Index (Rg) serves as a baseline, with comparisons made to several other measures documented in scientific literature and 12 new measures formulated for this analysis using various components of existing measures. The results demonstrate that changes in the color sample set, color space, and calculation procedure can all lead to substantial differences in light source performance characterizations. It is impossible to determine the relative “accuracy” of any given measure outright, because gamut area is not directly correlated with any subjective quality of an illuminated environment. However, the utility of different approaches was considered based on the merits of individual components of the gamut area calculation and based on the ability of a measure to provide useful information within a complete system for evaluating color rendition. For gamut area measures, it is important to have a reasonably uniform distribution of color samples (or averaged coordinates) across hue angle—avoiding exclusive use of high-chroma samples—with sufficient quantity to ensure robustness but enough difference to avoid incidents of the hue-angle order of the samples varying between the test and reference conditions. -
Goethe's Theory of Colors Between the Ancient Philosophy, Middle Ages
CULTURE, MEDIA & FILM | RESEARCH ARTICLE Goethe’s theory of colors between the ancient philosophy, middle ages occultism and modern science Victor Barsan and Andrei Merticariu Cogent Arts & Humanities (2016), 3: 1145569 Page 1 of 29 Barsan & Merticariu, Cogent Arts & Humanities (2016), 3: 1145569 http://dx.doi.org/10.1080/23311983.2016.1145569 CULTURE, MEDIA & FILM | RESEARCH ARTICLE Goethe’s theory of colors between the ancient philosophy, middle ages occultism and modern science 1 2 Received: 18 February 2015 Victor Barsan * and Andrei Merticariu Accepted: 20 January 2016 Published: 18 February 2016 Abstract: Goethe’s rejection of Newton’s theory of colors is an interesting example *Corresponding author: Victor Barsan, of the vulnerability of the human mind—however brilliant it might be—to fanati- Department of Theoretical Physics, cism. After an analysis of Goethe’s persistent fascination with magic and occultism, Horia Hulubei Institute of Physics and Nuclear Engineering, Aleea Reactorului of his education, existential experiences, influences, and idiosyncrasies, the authors nr. 30, Magurele, Bucharest, Romania E-mail: [email protected] propose an original interpretation of his anti-Newtonian position. The relevance of Goethe’s Farbenlehre to physics and physiology, from the perspective of modern sci- Reviewing editor: Peter Stanley Fosl, Transylvania ence, is discussed in detail. University, USA Subjects: Aristotle; Biophysics; Experimental Physics; Fine Art; Medical Physics; Ophthal- Additional information is available at the end of the article mology; Philosophy of Art; Philosophy of Science; Presocratics Keywords: ancient philosophy; Greek–Roman classicism; middle ages science; Newtonian science; occultism; pantheism; optics; theory of colors; primordial phenomenon (urphaeno men) 1. Introduction Light is one of the most interesting components of the physical universe. -
Fuzzy Set Theoretical Approach to the Tone Triangular System
JOURNAL OF COMPUTERS, VOL. 6, NO. 11, NOVEMBER 2011 2345 Fuzzy Set Theoretical Approach to the Tone Triangular System Naotoshi Sugano Tamagawa University, Tokyo, Japan [email protected] Abstract—The present study considers a fuzzy color system gravity of the attribute information of vague colors. This in which three input fuzzy sets are constructed on the tone fuzzy set theoretical approach is useful for vague color triangle. This system can process a fuzzy input to a tone information processing, color identification, and similar triangular system and output to a color on the RGB applications. triangular system. Three input fuzzy sets (not black, white, and light) are applied to the tone triangle relationship. By treating three attributes of chromaticness, whiteness, and II. METHODS blackness on the tone triangle, a target color can be easily A. Color Triangle and Additive Color Mixture obtained as the center of gravity of the output fuzzy set. In Additive color mixing occurs when two or three beams the present paper, the differences between fuzzy inputs and inference outputs are described, and the relationship of differently colored light combine. It has been found between inference outputs for crisp inputs and for fuzzy that mixing just three additive primary colors, red, green, inputs on the RGB triangular system are shown by the and blue, can produce the majority of colors. In general, a input-output characteristics between chromaticness, color vector can be described by certain quantities as a whiteness, and blackness as the inputs and redness (as one scalar and a direction. These quantities are referred to as of the outputs). -
A Correlated Color Temperature for Illuminants
. (R P 365) A CORRELATED COLOR TEMPERATURE FOR ILLUMINANTS By Raymond Davis ABSTRACT As has long been known, most of the artificial and natural illuminants do not match exactly any one of the Planckian colors. Therefore, strictly speaking, they can not be assigned a color temperature. A color of this type may, however, be correlated with a representative Planckian color. The method of determining correlated color temperature described in this paper consists in comparing the relative luminosities of each of the three primary red, green, and blue components of the source with similar values for the Planckian series. With such a comparison three component temperatures are obtained; that is, the red component of the source corresponds with that of the Planckian radiator at one temperature, its green component with that of the Planckian radiator at a second temperature, and its blue component with that of the Planckian radiator at a third temperature. The average of these three component temperatures is designated as the correlated color temperature of the source. The mean devia- tion of the component temperatures from the average temperature is used as a basis for specifying the color (chromaticity) departure of the source from that of the Planckian radiator at the correlated color temperature. The conjunctive wave length indicates the kind of color departure. CONTENTS Page I. Introduction 659 II. The proposed method 662 III. Procedure 665 1. The Planckian radiator evaluated in terms of relative lumi- nosity of the primary components 665 2. Computation of the correlated color temperature 670 3. Calculation of color departure in terms of sensation steps 672 4. -
Gamut Analysis XCMYK
Gamut Analysis XCMYK Kiran Deshpande Multi Packaging Solutions, UK Outline • Background • Gamut metrics for analysis • XCMYK vs. GRACoL2013 CRPC6 • XCMYK vs. FOGRA51 • XCMYK vs. Proofer (Epson9900) • XCMYK vs. 7-color CMYKOGV • Summary Background • XCMYK – new expanded gamut 4-color printing process • Standard ISO 12647-2 compliant CMYK inks can be used • with higher ink film thickness • non-traditional screening e.g. FM • XCMYK dataset and ICC profile – Idealliance1 Gamut Metrics – relative coverage • We often need to compare two or more color gamuts • The absolute difference in gamut volumes alone is a poor indicator • It can't tell if the gamuts intersect sufficiently to meet the reproduction aims • Two gamuts having the same volume may not coincide • Metric needs to include both relative volume and intersection Gamut Comparison Index (GCI) • GCI2 – objective metric to quantify the difference between two gamuts • GCI between two gamuts shows how closely they match – similar to DE V V i i GCI = Vx Vy Vx : gamut volume of the medium x Vy : gamut volume of the medium y Vi : volume of intersection of the two gamuts (Vx ∩ Vy) Gamut Metrics – relative coverage • [Vi / Vx]: how much of gamut x is covered by gamut y • [Vi / Vy]: how much of gamut y is covered by gamut x • [(Vx – Vi ) / Vx]: how much of gamut x is outside the gamut y • [(Vy – Vi ) / Vy]: how much of gamut y is outside the gamut x • [Vx / Vy]: ratio of gamut x to gamut y Gamut Metrics2 Datasets and method • Reference gamut – XCMYK2017IT8 • GRACoL2013_CRPC63 • FOGRA514 • Proofer gamut – example Epson9900 • 7c Expanded Gamut CMYKOGV – Press1 & Press2 • Gamut volume calculation method – Alpha-shapes XCMYK vs. -
Raphics & Visualization
Graphics & Visualization Chapter 11 COLOR IN GRAPHICS & VISUALIZATION Graphics & Visualization: Principles & Algorithms Chapter 11 Introduction • The study of color, and the way humans perceive it, a branch of: Physics Physiology Psychology Computer Graphics Visualization • The result of graphics or visualization algorithms is a color or grayscale image to be viewed on an output device (monitor, printer) Graphics programmer should be aware of the fundamental principles behind color and its digital representation Graphics & Visualization: Principles & Algorithms Chapter 11 2 Grayscale • Intensity: achromatic light; color characteristics removed • Intensity can be represented by a real number between 0 (black) and 1 (white) Values between these two extremes are called grayscales • Assume use of d bits to represent the intensity of each pixel n=2d different intensity values per pixel • Question: which intensity values shall we represent ? • Answer: Linear scale of intensities between the minimum & maximum value, is not a good idea: Human eye perceives intensity ratios rather than absolute intensity values. Light bulb example: 20-40-60W Therefore, we opt for a logarithmic distribution of intensity values Graphics & Visualization: Principles & Algorithms Chapter 11 3 Grayscale (2) • Let Φ0 be the minimum intensity value For typical monitors: Φ0 = (1/300) * maximum value 1 (white) Such monitors have a dynamic range of 300:1 • Let λ be the ratio between successive intensity values • Then we take: Φ1 = λ* Φ0 2 Φ1 = λ* Φ1=λ *Φ0 …