Color Mixing…
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Color Gamut of Halftone Reproduction*
Color Gamut of Halftone Reproduction* Stefan Gustavson†‡ Department of Electrical Engineering, Linkøping University, S-581 83 Linkøping, Sweden Abstract tern then gets attenuated once more by the pattern of ink that resides on the surface, and the finally reflected light Color mixing by a halftoning process, as used for color is the result of these three effects combined: transmis- reproduction in graphic arts and most forms of digital sion through the ink film, diffused reflection from the hardcopy, is neither additive nor subtractive. Halftone substrate, and transmission through the ink film again. color reproduction with a given set of primary colors is The left-hand side of Fig. 2 shows an exploded view of heavily influenced not only by the colorimetric proper- the ink layer and the substrate, with the diffused reflected ties of the full-tone primaries, but also by effects such pattern shown on the substrate. The final viewed image as optical and physical dot gain and the halftone geom- is a view from the top of these two layers, as shown to etry. We demonstrate that such effects not only distort the right in Fig. 2. The dots do not really increase in the transfer characteristics of the process, but also have size, but they have a shadow around the edge that makes an impact on the size of the color gamut. In particular, a them appear larger, and the image is darker than what large dot gain, which is commonly regarded as an un- would have been the case without optical dot gain. wanted distortion, expands the color gamut quite con- siderably. -
Color Mixing Ratios
Colour Mixing: Ratios Color Theory with Tracy Moreau Learn more at DecoArt’s Art For Everyone Learning Center www.tracymoreau.net Primary Colours In painting, the three primary colours are yellow, red, and blue. These colors cannot be created by mixing other colours. They are called primary because all other colours are derived from them. Mixing Primary Colours Creates Secondary Colours If you combine two primary colours you get a secondary colour. For example, red and blue make violet, yellow and red make orange, and blue and yellow make green. If you mix all of the primary colours together you get black. The Mixing Ratio for Primary Colours To get orange, you mix the primary colours red and yellow. The mixing ratio of these two colours determines which shade of orange you will get after mixing. For example, if you use more red than yellow you will get a reddish-orange. If you add more yellow than red you will get a yellowish-orange. Experiment with the shades you have to see what you can create. Try out different combinations and mixing ratios and keep a written record of your results so that you can mix the colours again for future paintings. www.tracymoreau.net Tertiary Colours By mixing a primary and a secondary colour or two secondary colours you get a tertiary colour. Tertiary colours such as blue-lilac, yellow-green, green-blue, orange-yellow, red-orange, and violet-red are all created by combining a primary and a secondary colour. The Mixing Ratios of Light and Dark Colours If you want to darken a colour, you only need to add a small amount of black or another dark colour. -
The ISCC-NBS Method of Designating Colors and a Dictionary of Color Names
Uc 8 , .Department of Commerce Na Canal Bureau of Standards Circular UNITED STATES DEPARTMENT OF COMMERCE • Sinclair Weeks, Secretary NATIONAL BUREAU OF STANDARDS • A. V. Astin, Director The ISCC-NBS Method of Designating Colors and a Dictionary of Color Names National Bureau of Standards Circular 553 Issued November 1, 1955 For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C. Price 32 7 1 National Bureau of Standards NOV 1 1955 8 (0*118 QC 00 U555 Cop. 1 Preface I^Ever since the language of man began to develop, words or expressions have been used first to indicate and then to describe colors. Some of these have per- sisted throughout the centuries and are those which refer to the simple colors or ranges such as red or yellow. As the language developed, more and more color names were invented to describe the colors used by art and industry and in late years in the rapidly expanding field of sales promotion. Some of these refer to the pigment or dye used, as Ochre Red or Cochineal, or a geographical location of its source such as Naples Yellow or Byzantium. Later when it became clear that most colors are bought by or for women, many color names indicative of the beauties and wiles of the fan- sex were introduced, as French Nude, Heart’s Desire, Intimate Mood, or Vamp. Fanciful color names came into vogue such as Dream Fluff, Happy Day, Pearly Gates, and Wafted Feather. Do not suppose that these names are without economic importance for a dark reddish gray hat for Milady might be a best seller ; if advertised as Mauve Wine whereas it probably would not if the color were called Paris Mud. -
Color Mixing Challenge
COLOR MIXING CHALLENGE Target age group: any age Purpose of activity: to experiment with paint and discover color combinations that will make many different shades of the basic colors Materials needed: copies of the pattern page printed onto heavy card stock paper, small paint brushes, paper towels, paper plates to use as palettes (or half-sheets of card stock), a bowl of water to rinse brushes, acrylic paints in these colors: red, blue, yellow, and white (NOTE: Try to purchase the most “true” colors you can-- a royal blue, a true red, a medium yellow.) Time needed to complete activity: about 30 minutes (not including set-up and clean-up time) How to prepare: Copy (or print out) a pattern page for each student. Give each student a paper plate containing a marble-sized blob of red, blue, yellow and white. (Have a few spare plates available in case they run out of mixing space on their fi rst plate.) Also provide a paper towel and a bowl of rinse water. If a student runs out of a particular color of paint, give them a dab more. This will avoid wasting a lot of paint. (If you let the students fi ll their own paints, they will undoubtedly waste a lot of paint. In my experience, students almost always over-estimate how much paint they need.) What to do: It’s up to you (the adult in charge) how much instruction to give ahead of time. You may want to discuss color theory quite a bit, or you may want to emphasize the experimental nature of this activity and let the students discover color combinations for themselves. -
Computational RYB Color Model and Its Applications
IIEEJ Transactions on Image Electronics and Visual Computing Vol.5 No.2 (2017) -- Special Issue on Application-Based Image Processing Technologies -- Computational RYB Color Model and its Applications Junichi SUGITA† (Member), Tokiichiro TAKAHASHI†† (Member) †Tokyo Healthcare University, ††Tokyo Denki University/UEI Research <Summary> The red-yellow-blue (RYB) color model is a subtractive model based on pigment color mixing and is widely used in art education. In the RYB color model, red, yellow, and blue are defined as the primary colors. In this study, we apply this model to computers by formulating a conversion between the red-green-blue (RGB) and RYB color spaces. In addition, we present a class of compositing methods in the RYB color space. Moreover, we prescribe the appropriate uses of these compo- siting methods in different situations. By using RYB color compositing, paint-like compositing can be easily achieved. We also verified the effectiveness of our proposed method by using several experiments and demonstrated its application on the basis of RYB color compositing. Keywords: RYB, RGB, CMY(K), color model, color space, color compositing man perception system and computer displays, most com- 1. Introduction puter applications use the red-green-blue (RGB) color mod- Most people have had the experience of creating an arbi- el3); however, this model is not comprehensible for many trary color by mixing different color pigments on a palette or people who not trained in the RGB color model because of a canvas. The red-yellow-blue (RYB) color model proposed its use of additive color mixing. As shown in Fig. -
Metal Color Chart.Pdf
Quality Metals San Antonio Dallas McAllen Houston (210) 227-7276 (972) 331-6800 (956) 627-2826 (713) 944-4480 www.saqualitymetals.com • [email protected] Standard Colors Regal White Almond Sandstone Surrey Beige Sierra Tan SR=.72 E=.82 SR=.65 E=.84 SR=.60 E=.85 SR=.49 E=.85 SR=.46 E=.85 Ash Gray Slate Gray Musket Gray Charcoal Gray Patina Green SR=.51 E=.77 SR=.38 E=.85 SR=.32 E=.84 SR=.32 E=.88 SR=.42 E=.75 Slate Blue Evergreen Terra Cotta Colonial Red Seal Brown SR=.30 E=.83 SR=.25 E=.79 SR=.42 E=.82 SR=.29 E=.86 SR=.30 E=.86 Buckskin Medium Bronze Aged Bronze Copper Brown Dark Bronze SR=.37 E=.82 SR=.29 E=.84 SR=.30 E=.85 SR=.26 E=.82 SR=.26 E=.81 Premium Colors Matte Black Felt Green Hartford Green Brite Red Burgundy Regal Blue SR=.27 E=.84 SR=.25 E=.77 SR=.29 E=.83 SR=.40 E=.85 SR=.26 E=.84 SR=.22 E=.80 Metallic Colors Galvalume Silver Metallic Champagne Weathered Galvalume Copper Metallic SR=.57 E=.62 SR=.42 E=.79 SR=.44 E=.63 SR=.49 E=.88 Low Gloss - Low Sheen Colors Slate Gray Copper Brown Aged Bronze Dark Bronze Medium Bronze SR=.34 E=.84 SR=.25 E=.85 SR=.26 E=.84 SR=.29 E=.85 SR=.27 E=.86 *35 Year Limited Warranty on Dura Coat Durapon 70™ Painted Material. *Custom Color Matches are available. All Colors shown are within the limits of color chip reproduction. -
Subtractive Color Mixture Computation
By Dennis Jarvis [CC BY-SA 2.0], via Wikimedia Commons (cropped) Subtractive Color Mixture Computation by Scott Allen Burns, Urbana, IL Published March 10, 2015; last updated May 3, 2015 Note: This is a PDF version of the web page http://scottburns.us/subtractive-color-mixture/ Overview I present an algorithm for computationally mixing screen colors (RGB colors) subtractively. The question it addresses is, "Given two colors specified by their RGB triplets, what RGB triplet should be used to represent the color that would arise if the two colors were mixed like paint colors, i.e., mixed subtractively?" The only way I can think of doing this in a rigorous way is to employ the math behind how a stimulus (a continuous spectral power distribution) enters our eyes and is transformed into a three-dimensional color sensation by our brain. Once this process has been adequately modeled, subtractive color mixture follows directly. The approach I present here is to convert the RGB colors to spectral reflectance curves, mix the curves using the weighted geometric mean, and then convert the result back to RGB. A Disclaimer The algorithm described here provides a representative model for subtractive color mixture. The way actual paints mix, for example, is highly dependent upon the particular pigments being used, as well as many other factors. Be aware that you can mix a blue and a yellow paint to get green in one case, and then mix another blue (that appears IDENTICAL to the first blue and has the same RGB value) and another yellow (appearing IDENTICAL to the first yellow, with the same RGB value) and get brown or some other color as a result! There is no way to differentiate between these two different outcomes based on the RGB values of the source colors. -
Pac-Clad® Color Chart
pa c - c l a d ® c O l O R c H a RT Cardinal Red Colonial Red Burgundy Terra Cotta Sierra Tan Mansard Brown Stone White Granite Sandstone Almond Medium Bronze Dark Bronze Slate Gray Bone White Musket Gray Charcoal Midnight Bronze Matte Black Cityscape Interstate Blue Hemlock Green Arcadia Green Patina Green Hunter Green Military Blue Award Blue Teal Hartford Green Forest Green Evergreen Denotes PAC-CLAD Metallic Colors Denotes Energy Star® Colors Denotes PAC-CLAD Cool Colors Kynar 500® or Hylar 5000® pre-finished galvanized steel and aluminum for roofing, curtainwall and storefront applications. Berkshire Blue Slate Blue PAC-CLAD Metallic Colors Zinc Silver Copper Penny Aged Copper Champagne Weathered Zinc PETERSEN ALUMINUM CORPORATION HQ: 1005 Tonne Road 9060 Junction Drive 10551 PAC Road 350 73rd Ave., NE, Ste 1 102 Northpoint Pkwy Ext, Bldg 1, Ste 100 Elk Grove Village, IL 60007 Annapolis Junction, MD 20701 Tyler, TX 75707 Fridley, MN 55432 Acworth, GA 30102 P: 800-PAC-CLAD P: 800-344-1400 P: 800-441-8661 P: 877-571-2025 P: 800-272-4482 F: 800-722-7150 F: 301-953-7627 F: 903-581-8592 F: 866-901-2935 F: 770-420-2533 pa c - c l a d ® c O l O R aVa I l a BI l ITY PAC-CLAD 3 year STeeL ALuMiNuM eNeRGy STANDARD RefLectiviTy EmissiviTy SRi 24ga. 22ga. .032 .040 .050 .063 ® COLORS exposuRe STAR Almond 0.56 0.83 0.27 64 √ √ √ √ √ • Arcadia Green 0.33 0.84 0.32 33 √ √ • Bone White 0.71 0.85 0.71 86 √ √ √ √ √ √ • Cardinal Red 0.42 0.84 0.41 45 √ √ √ • Charcoal 0.28 0.84 0.28 27 √ √ √ • Cityscape 0.37 0.85 0.34 39 √ √ √ √ • Colonial Red 0.34 -
Between Additive and Subtractive Color Mixings: Intermediate Mixing Models Lionel Simonot, Mathieu Hébert
Between additive and subtractive color mixings: intermediate mixing models Lionel Simonot, Mathieu Hébert To cite this version: Lionel Simonot, Mathieu Hébert. Between additive and subtractive color mixings: intermediate mixing models. Journal of the Optical Society of America. A Optics, Image Science, and Vision, Optical Society of America, 2013, 31 (1), pp.58-66. 10.1364/JOSAA.31.000058. hal-00962256 HAL Id: hal-00962256 https://hal.archives-ouvertes.fr/hal-00962256 Submitted on 20 Sep 2014 HAL is a multi-disciplinary open access L’archive ouverte pluridisciplinaire HAL, est archive for the deposit and dissemination of sci- destinée au dépôt et à la diffusion de documents entific research documents, whether they are pub- scientifiques de niveau recherche, publiés ou non, lished or not. The documents may come from émanant des établissements d’enseignement et de teaching and research institutions in France or recherche français ou étrangers, des laboratoires abroad, or from public or private research centers. publics ou privés. 58 J. Opt. Soc. Am. A / Vol. 31, No. 1 / January 2014 L. Simonot and M. Hébert Between additive and subtractive color mixings: intermediate mixing models Lionel Simonot1,* and Mathieu Hébert2 1Institut Pprime, Université de Poitiers, CNRS UPR 3346, Département Physique et mécanique des matériaux, SP2MI, BP 30179, 86962 Chasseneuil, Futuroscope Cedex, France 2Université de Lyon, Université Jean Monnet de Saint-Etienne, CNRS UMR5516, Laboratoire Hubert Curien, F-42000 Saint-Etienne, France *Corresponding author: lionel.simonot@univ‑poitiers.fr Received July 18, 2013; revised October 16, 2013; accepted November 11, 2013; posted November 13, 2013 (Doc. ID 194145); published December 5, 2013 The color rendering of superposed coloring components is often an issue either to predict or to simulate the ap- pearance of colored surfaces. -
Rutland™ Ink Standard Colors for Screen Printing Ink Rutland Screen Printing Ink Colors
COLOR CARD RUTLAND™ INK STANDARD COLORS FOR SCREEN PRINTING INK RUTLAND SCREEN PRINTING INK COLORS Ready for Use Colors M3 Color Mixing System C3 Color Boosting Rutland low cure inks are non- The Rutland M3 non-phthalate Mixing System phthalate ready-for-use color finished ink color mixing system The Rutland non-phthalate color inks comprised of two barriers, is a collection of Pantone®-listed booster mixing system consists of one white ink, one black ink and colors used to create custom single pigment color concentrates 28 brilliant colors. The inks are formulations. This versatile that were developed as a means available in two series: EH high ink mixing system is ideal for of enhancing finished ink mixing opacity and EL low bleed. color matching and new color primaries to offer a darker, development. more saturated color. Rutland Standard Colors EL3399 EL2768 EL4769 EL3403 EL7574 NPT Forest Green NPT LB Bright Blue NPT LB Bright Gold NPT LB Dallas Green NPT LB Dark Brown EL2406 EL4202 EL5203 EL6399 EL6398 NPT LB Dark Navy NPT LB Gold NPT LB HO Bright Orange NPT LB HO Burgundy NPT LB HO Cardinal EL7003 EL0730 EL3401 EL1570 EL1212 NPT LB HO Peach NPT LB HO Grey NPT LB HO Lt Green NPT LB HO Purple NPT LB HO Team Violet EL7495 EL5159 EL4500 EL2589 EL2402 NPT LB HO Spice Brown NPT LB HO Team Orange NPT LB HO Vegas Gold NPT LB Lt Blue NPT LB Lt Navy EL6279 EL2449 EL2584 EL6400 EL2499 NPT LB Red NPT LB Lt Royal NPT LB Royal NPT LB Scarlet NPT LB Turquoise EL4611 EL4215 EL5202 NPT LB Yellow NPT LB Yellow RS NPT Lt Orange Rutland M3 and C3 Mixing System Colors 1440 2441 2442 2443 3443 Violet Blue #1 Blue #2 Marine Green 4449 6446 6447 1038 1018 Yellow Scarlet Red FF Fl Violet FL Magenta Rutland M3 and C3 Mixing System Colors 4042 6057 1017 1037 2065 FL Lemon FL Red FL Magenta FL Violet FL Blue 3033 4037 4041 5018 6055 FL Green FL Yellow FL Lemon FL Orange FL Pink USING THIS CHART This color selection chart is a tool to assist in selecting your requirements, Avient color experts can use your the proper screen printing ink for specific applications. -
8.9 Mixing Colours.Pdf
8.9 Mixing Colours Grade 8 Activity Plan 1 Reviews and Updates 2 8.9 Mixing Colours Objectives: 1. To demonstrate the properties of white light; it’s component colors and how they can be revealed. 2. To outline the differences between additive and subtractive colour mixing. 3. To understand the colour wheel and concepts associated with it such as complimentary colours etc. Keywords/concepts: rays, beams, pigment, pixels, visible light spectrum, Isaac Newton’s color wheel, additive and subtractive colour mixing, primary and secondary colours, complimentary colours, speed and wavelength of light. Curriculum outcomes: 209-2, 209-6, 210-11, 308-8, 308-9, 308-10. Take-home product: colour wheel 3 Segment Details African Proverb and “Before one has white hairs, one must first have them Cultural Relevance black.” Wolof, Senegal (5 min.) Ask probing questions on students’ knowledge of colours. Pre-test A little light on the psychology of colours is also (10 min.) appropriate. Explain the mixture of colours in white or colourless light. Use colour viewing box. Describe process of additive Background colour mixing. Demonstrate using torches and cellophane (10 min.) paper. Detail primary additive colours. Describe subtractive colour mixing. Demonstrate with paints. Detail primary subtractive colours. Describe how filters work using the colour viewing box. Activity 1 Also endeavour to illustrate the effect of filters on the (10 min.) colours of other objects around Activity 2 Using the prism and simulation link provided, demonstrate (15 min.) that white light is made up of other component colours. Activity 3 Using a painted or printed colour wheel, illustrate additive (20 min.) colour mixing. -
Gull ID Manual
The Morlan Method Dichotomous Keys for Western North American Gull Identification Dichotomous keys copyright 1980 by Joseph Morlan. Reprinted by permission. Developed for birding classes at San Francisco City College. See <http://fog.ccsf.cc.ca.us/~jmorlan/> for course schedules and further information. The following dichotomous keys are designed to aid beginning and intermediate gull watchers. They will not resolve the identification of all gulls found on the West Coast. They are geared toward identification of our regularly occurring gull species from September through March and may not match features shown in spring and summer. Hybrid gulls, which are readily seen in some areas, are not addressed. Successful use of these keys first requires determination of the age of the bird. Some useful points to focus in aging gulls are given at the beginning of each key. Distinctive species, such as Bonaparte’s, Heermann’s and Sabine’s gulls and Black-legged Kittiwake are not included. Molt Sequence in Gulls winter, which corresponds to the second winter plumage of the larger gulls. In these birds, the juvenal plumage is Most gulls undergo a complete molt of feathers in late sum- retained only through early October. Their first winter mer. During August and September, most gulls will be in plumage is acquired rapidly by wear and a partial molt dur- molt and, thus, will show transitional plumages. However, ing September and October. After this partial molt, a stable the sequence is different for first year birds. A juvenal first winter plumage is worn until the first complete molt, plumage (the first full set of real feathers) is acquired during which often starts as early as February.