Linear Color Coordinates are Measurable (X Y Z ) Color Management CIE-XYZ as a Universal Standard. Linear Color Coordinates are Comparable (X Y Z )

Size: px
Start display at page:

Download "Linear Color Coordinates are Measurable (X Y Z ) Color Management CIE-XYZ as a Universal Standard. Linear Color Coordinates are Comparable (X Y Z )"

Transcription

1 Linear Color Coordinates are Measurable (X Y Z ) Color Management CIE-XYZ as a Universal Standard Linear Color Coordinates are Comparable (X Y Z )

2 Chromaticity defined in Polar Coordinates Given a reference white. Dominant Wavelength - wavelength of the spectral color which added to the reference white, produces the given color. Complementary Wavelength - wavelength of the spectral color which added to the given color, produces the reference white. Excitation Purity - the ratio of the lengths between the given color and reference white and between the dominant wavelength light and reference white. Ranges between Dominant/complimentary Wavelength Relationship between HSV and XYZ Y vs V : Luminance (intensity) vs Brightness (Lightness) Luminance I1 I1 I1 < I2, I1 = I2 I2 I purity reference white Equal intensity steps: Equal brightness steps:

3 Weber s Law Munsell lines of constant Hue and Chroma. 0.5 In general, I needed for just noticable difference (JND) over background I was found to satisfy: I I = constant y (I is intensity, I is change in intensity) Weber s Law: Perceived Brightness = log (I) 0.1 Value =1/ x MacAdam Ellipses of JND (Just Noticable difference) 0.8 Perceived Brightness Intensity y (Ellipses scaled by 10) x

4 The transformation from XYZ space to perceptual space is Non Linear: Linear approximation defined by CIE: CIE Uniform Chromaticity Scale (UCS) : U = 2 X 3 V = Y U V W CIE- UVW Coordinates = W = -X + 3Y + Z X Y Z v Munsell lines of constant hue and chroma plotted in CIE-uv coordinates: u Value =1/ CIE-uv Chromaticity Coordinates: u = v = 4x -2x + 12y + 3 6y -2x + 12y + 3

5 Perceptual Color Spaces The transformation from XYZ space to perceptual space is Non Linear: Munsell lines of constant hue and chroma plotted in CIE- L * u * v * Coordinates: Value =5/ CIE- L * a * b * Coordinates a * = 500 [ (X/X 0 ) 1/3 - (Y/Y 0 ) 1/3 ] b * = 200 [ (X/X 0 ) 1/3 - (Z/Z 0 ) 1/3 ] L * = 116(Y/Y 0 ) 1/3-16 for Y/Y 0 > (Y/Y 0 ) otherwise X 0 Y 0 Z 0 = coordinates of reference white CIE- L * u * v * Coordinates u * = 13 L * (u -u 0 ) v * = 13 L * (1.5v -v 0 ) L * = 116(Y/Y 0 ) 1/3-16 for Y/Y 0 > (Y/Y 0 ) otherwise u 0 v 0 Y 0 = coordinates of reference white u = u v = 1.5 v v * u * MacAdam Ellipses of JND plotted in CIE- L * u * v * Coordinates: v * u * 200

6 Measuring Color Differences Image Retrieval - Image Database e 2 = L *2 + a * 2 + b * 2 e 2 = L *2 + u * 2 + v * 2 e = 3 visually indistiguishable e = 5 acceptable error (most printers) e = 10 bad e = 15 unacceptable Luminance I1 I1 I2 error for I1 : e = error for I2 : e = 4.64 I2 Distances should be measured in Perceptual Color space.

7 Opponent Colors Ewald Hering (1905) - Pure colors R G B Y. No such colors greenish-red, yellowish-blue Boynton & Gordon (1965) - With R G B Y can categorize all visible hues. Jameson & Hurvich (1955, 1957) - Hue Cancellation Experiments Hue Cancellation Experiment test light cancelling light Why Opponent process? A: Efficient Encoding. Relative sensitivity M-cone absorption Cone Spectral Sensitivity 1 S M L Wavelength (nm) L and M cone sensitivities are highly correlated. Cone responses to several Natural SPDs : L-cone absorption S-cone absorption M-cone absorption

8 Decorrelation: O 1 O 2 O 3 = R G B Spectral sensitivity of three decorrelating signals: Opponent Color Space + 1 Blue-Yellow Red-Green Black-White

9 Opponent Color Space black-white + + blue-yellow - + red-green - -

10 YIQ - Color Space NTSC = National Television Systems Committee Y = luminance I = red-green Q = blue-yellow Y I Q = R G B R G B are the CIE-RGB

11 Subtractive Color System - CMYK Original Y - Blur Printer Dyes: Cyan = removes red Magenta = removes green Yellow = removes blue black = removes all Ideal block dyes: cyan magenta yellow I - Blur Q - Blur transmit B G R B G R B G R

12 Opponent Color Wheel Multiplicative (Subtractive) Color System red = magenta + yellow B G R magenta * B G R yellow = B G R red Additive primaries Subtractive Primaries B G R red = magenta + yellow green = cyan + yellow blue = magenta + cyan R

13

14 Cyan - controls amount of red in print: low C = high R (also high G and B) high C = low R (high G and B) cyan B G R R G B High density cyan R G B Medium density cyan R G B Low density cyan

15 CMY + Black C + M + Y = K (black) Using three inks for black is expensive C+M+Y = dark brown not black Black instead of C+M+Y is crisper with more contrast. Undercolor removal - (gray component replacement) = C M Y K C M Y

16

17

18 Color Spaces - Summary RGB space - Additive space used for CRT, Color Image representation CIE-XYZ Tristimulus Coordinates - Device Independent, Universal standard CIE-Lab - Perceptual Space, used for image quality, Image Metric (distance measure). YIQ - Opponent Space, used for color television broadcast. HSV - Perceptual Digitized Space, used for Human Interactive Painting. CMYK - Subtractive Space used for ink and dyes (printing). All these color spaces are 3D. There are conversions from one space to the other.

Outline. Quantizing Intensities. Achromatic Light. Optical Illusion. Quantizing Intensities. CS 430/585 Computer Graphics I

Outline. Quantizing Intensities. Achromatic Light. Optical Illusion. Quantizing Intensities. CS 430/585 Computer Graphics I CS 430/585 Computer Graphics I Week 8, Lecture 15 Outline Light Physical Properties of Light and Color Eye Mechanism for Color Systems to Define Light and Color David Breen, William Regli and Maxim Peysakhov

More information

Overview. Raster Graphics and Color. Overview. Display Hardware. Liquid Crystal Display (LCD) Cathode Ray Tube (CRT)

Overview. Raster Graphics and Color. Overview. Display Hardware. Liquid Crystal Display (LCD) Cathode Ray Tube (CRT) Raster Graphics and Color Greg Humphreys CS445: Intro Graphics University of Virginia, Fall 2004 Color models Color models Display Hardware Video display devices Cathode Ray Tube (CRT) Liquid Crystal Display

More information

Green = 0,255,0 (Target Color for E.L. Gray Construction) CIELAB RGB Simulation Result for E.L. Gray Match (43,215,35) Equal Luminance Gray for Green

Green = 0,255,0 (Target Color for E.L. Gray Construction) CIELAB RGB Simulation Result for E.L. Gray Match (43,215,35) Equal Luminance Gray for Green Red = 255,0,0 (Target Color for E.L. Gray Construction) CIELAB RGB Simulation Result for E.L. Gray Match (184,27,26) Equal Luminance Gray for Red = 255,0,0 (147,147,147) Mean of Observer Matches to Red=255

More information

CBIR: Colour Representation. COMPSCI.708.S1.C A/P Georgy Gimel farb

CBIR: Colour Representation. COMPSCI.708.S1.C A/P Georgy Gimel farb CBIR: Colour Representation COMPSCI.708.S1.C A/P Georgy Gimel farb Colour Representation Colour is the most widely used visual feature in multimedia context CBIR systems are not aware of the difference

More information

Colour spaces - perceptual, historical and applicational background

Colour spaces - perceptual, historical and applicational background Colour spaces - perceptual, historical and applicational background Marko Tkalčič, Jurij F. Tasič Faculty of electrical engineering University of Ljubljana Tržaška 25, 1001 Ljubljana, Slovenia email: marko.tkalcic@fe.uni-lj.si

More information

1. Three-Color Light. Introduction to Three-Color Light. Chapter 1. Adding Color Pigments. Difference Between Pigments and Light. Adding Color Light

1. Three-Color Light. Introduction to Three-Color Light. Chapter 1. Adding Color Pigments. Difference Between Pigments and Light. Adding Color Light 1. Three-Color Light Chapter 1 Introduction to Three-Color Light Many of us were taught at a young age that the primary colors are red, yellow, and blue. Our early experiences with color mixing were blending

More information

Computer Vision. Color image processing. 25 August 2014

Computer Vision. Color image processing. 25 August 2014 Computer Vision Color image processing 25 August 2014 Copyright 2001 2014 by NHL Hogeschool and Van de Loosdrecht Machine Vision BV All rights reserved j.van.de.loosdrecht@nhl.nl, jaap@vdlmv.nl Color image

More information

Color Management Terms

Color Management Terms Written by Jonathan Sachs Copyright 2001-2003 Digital Light & Color Achromatic Achromatic means having no color. Calibration Calibration is the process of making a particular device such as a monitor,

More information

A simpler version of this lesson is covered in the basic version of these teacher notes.

A simpler version of this lesson is covered in the basic version of these teacher notes. Lesson Element Colour Theory Lesson 2 Advanced Colour Theory A simpler version of this lesson is covered in the basic version of these teacher notes. Task instructions The objective of the lesson is to

More information

Simplify your palette

Simplify your palette Simplify your palette ou can create most any spectrum color with a simple six color palette. And, an infinity of tones and shades you ll make by mixing grays and black with your colors... plus color tints

More information

Name Class Date. spectrum. White is not a color, but is a combination of all colors. Black is not a color; it is the absence of all light.

Name Class Date. spectrum. White is not a color, but is a combination of all colors. Black is not a color; it is the absence of all light. Exercises 28.1 The Spectrum (pages 555 556) 1. Isaac Newton was the first person to do a systematic study of color. 2. Circle the letter of each statement that is true about Newton s study of color. a.

More information

ICC Recommendations for Color Measurement

ICC Recommendations for Color Measurement White Paper #3 Level: Introductory Date: Dec 2004 ICC Recommendations for Color Measurement Introduction In order to prepare a useful device profile based on the International Color Consortium s Specification,

More information

CS 325 Computer Graphics

CS 325 Computer Graphics CS 325 Computer Graphics 01 / 25 / 2016 Instructor: Michael Eckmann Today s Topics Review the syllabus Review course policies Color CIE system chromaticity diagram color gamut, complementary colors, dominant

More information

THE NATURE OF LIGHT AND COLOR

THE NATURE OF LIGHT AND COLOR THE NATURE OF LIGHT AND COLOR THE PHYSICS OF LIGHT Electromagnetic radiation travels through space as electric energy and magnetic energy. At times the energy acts like a wave and at other times it acts

More information

ColourSpace Conversions

ColourSpace Conversions ColourSpace Conversions Adrian Ford(ajoec1@wmin.ac.uk ) and Alan Roberts (Alan.Roberts@rd.bbc.co.uk). August11,1998(b) Contents 1 Introduction 3 2 Some Colour Definitions and Explanations. 3 2.1

More information

Digital Image Basics. Introduction. Pixels and Bitmaps. Written by Jonathan Sachs Copyright 1996-1999 Digital Light & Color

Digital Image Basics. Introduction. Pixels and Bitmaps. Written by Jonathan Sachs Copyright 1996-1999 Digital Light & Color Written by Jonathan Sachs Copyright 1996-1999 Digital Light & Color Introduction When using digital equipment to capture, store, modify and view photographic images, they must first be converted to a set

More information

1. Introduction to image processing

1. Introduction to image processing 1 1. Introduction to image processing 1.1 What is an image? An image is an array, or a matrix, of square pixels (picture elements) arranged in columns and rows. Figure 1: An image an array or a matrix

More information

A Adobe RGB Color Space

A Adobe RGB Color Space Adobe RGB Color Space Specification Version DRAFT October 2, 2004 Please send comments to mailto:lars.borg@adobe.com This publication and the information herein are subject to change without notice, and

More information

Color quality guide. Quality menu. Color quality guide. Page 1 of 6

Color quality guide. Quality menu. Color quality guide. Page 1 of 6 Page 1 of 6 Color quality guide The Color Quality guide helps users understand how operations available on the printer can be used to adjust and customize color output. Quality menu Menu item Print Mode

More information

Important Notes Color

Important Notes Color Important Notes Color Introduction A definition for color (MPI Glossary) The selective reflection of light waves in the visible spectrum. Materials that show specific absorption of light will appear the

More information

Munsell Soil Color. Munsell Gradient No. Code

Munsell Soil Color. Munsell Gradient No. Code Munsell Gradient No. Munsell Soil Color Code Munsell Soil Color Description 10.0 10R 2.5/1 Reddish Black 10.0 10R 2.5/2 Very Dusky Red 10.0 10R 3/1 Dark Reddish 10.0 10R 3/2 Dusky Red 10.0 10R 3/3 Dusky

More information

RGB coordinates of the Macbeth ColorChecker

RGB coordinates of the Macbeth ColorChecker RGB coordinates of the Macbeth ColorChecker Danny Pascale The BabelColor Company dpascale@babelcolor.com www.babelcolor.com 2000-2006 Danny Pascale Complete update June 1 st, 2006 Abstract. The ColorChecker

More information

Digital Color Workflows and the HP DreamColor LP2480zx Professional LCD Display

Digital Color Workflows and the HP DreamColor LP2480zx Professional LCD Display Digital Color Workflows and the HP DreamColor LP2480zx Professional LCD Display Improving accuracy and predictability in color processing at the designer s desk can increase productivity and improve quality

More information

THE BASICS OF COLOUR THEORY

THE BASICS OF COLOUR THEORY HUE: VALUE: THE BASICS OF COLOUR THEORY Hue is another word for colour, such as blue, red, yellow-green Distinguishes between the lightness (tint) and darkness (shade) of Colours. (TONE) CHROMA: The vibrancy

More information

Introduction to Light, Color, and Shadows

Introduction to Light, Color, and Shadows Introduction to Light, Color, and Shadows What is light made out of? -waves, photons, Electromagnetic waves (don t know this one) How do you get color? - different wavelengths of light. What does it mean

More information

Frequently Asked Questions about Color

Frequently Asked Questions about Color Frequently Asked Questions about Color Charles Poynton www.poynton.com poynton@poynton.com This FAQ is intended to clarify aspects of color that are important to color image coding, computer graphics,

More information

Denis White Laboratory for Computer Graphics and Spatial Analysis Graduate School of Design Harvard University Cambridge, Massachusetts 02138

Denis White Laboratory for Computer Graphics and Spatial Analysis Graduate School of Design Harvard University Cambridge, Massachusetts 02138 Introduction INTERACTIVE COLOR MAPPING Denis White Laboratory for Computer Graphics and Spatial Analysis Graduate School of Design Harvard University Cambridge, Massachusetts 02138 The information theory

More information

13 PRINTING MAPS. Legend (continued) Bengt Rystedt, Sweden

13 PRINTING MAPS. Legend (continued) Bengt Rystedt, Sweden 13 PRINTING MAPS Bengt Rystedt, Sweden Legend (continued) 13.1 Introduction By printing we mean all kind of duplication and there are many kind of media, but the most common one nowadays is your own screen.

More information

RGB Workflow Key Communication Points. Journals today are published in two primary forms: the traditional printed journal and the

RGB Workflow Key Communication Points. Journals today are published in two primary forms: the traditional printed journal and the RGB Workflow Key Communication Points RGB Versus CMYK Journals today are published in two primary forms: the traditional printed journal and the online journal. As the readership of the journal shifts

More information

Waves Sound and Light

Waves Sound and Light Waves Sound and Light r2 c:\files\courses\1710\spr12\wavetrans.doc Ron Robertson The Nature of Waves Waves are a type of energy transmission that results from a periodic disturbance (vibration). They are

More information

CULTURAL HISTORY Primary Colors - Part 1 of 2 by Neal McLain

CULTURAL HISTORY Primary Colors - Part 1 of 2 by Neal McLain Ok, so what are the Primary Colors? CULTURAL HISTORY Primary Colors - Part 1 of 2 by Neal McLain Since grade school art classes, we've been taught that the primary colors are red, yellow, and blue (RYB).

More information

Chapter 7 ADDITIVE COLOR MIXING

Chapter 7 ADDITIVE COLOR MIXING Chapter 7 page You need to learn the concepts and formulae highlighted in red. The rest of the text is for your intellectual enjoyment, but is not a requirement for homework or exams. Chapter 7 ADDITIVE

More information

Color Part I. (The two items we can determine: a. How bright is the light is. b. What color the light is.)

Color Part I. (The two items we can determine: a. How bright is the light is. b. What color the light is.) Color Part I Name Color is one of the most important pieces of information scientists have used for all time. In space it is one of only two pieces of information we can collect without sending probes

More information

The role of working spaces in Adobe applications

The role of working spaces in Adobe applications Technical paper The role of working spaces in Adobe applications Table of contents 1 It s all a numbers game 1 Color models 2 Color spaces 4 Classes of color spaces 4 Design and benefits of RGB workspaces

More information

Three Key Paper Properties

Three Key Paper Properties Three Key Paper Properties Whiteness, Brightness and Shade Demystifying Three Key Paper Properties Whiteness, Brightness and Shade Xerox Supplies, See the Difference Quality Makes Prepared by: Xerox Corporation

More information

Choosing Colors for Data Visualization Maureen Stone January 17, 2006

Choosing Colors for Data Visualization Maureen Stone January 17, 2006 Choosing Colors for Data Visualization Maureen Stone January 17, 2006 The problem of choosing colors for data visualization is expressed by this quote from information visualization guru Edward Tufte:

More information

A comparison between a CRT and a LCD monitors colors rendering

A comparison between a CRT and a LCD monitors colors rendering A comparison between a CRT and a LCD monitors colors rendering TOADERE FLORIN, NIKOS E. MASTORAKIS INCDTIM Cluj Napoca Str. Donath, nr. 65-103, Cluj Napoca, 400293, ROMANIA Florin.Toadere@bel.utcluj.ro

More information

Expert Color Choices for Presenting Data

Expert Color Choices for Presenting Data Expert Color Choices for Presenting Data Maureen Stone, StoneSoup Consulting The problem of choosing colors for data visualization is expressed by this quote from information visualization guru Edward

More information

VISUAL ARTS VOCABULARY

VISUAL ARTS VOCABULARY VISUAL ARTS VOCABULARY Abstract Artwork in which the subject matter is stated in a brief, simplified manner; little or no attempt is made to represent images realistically, and objects are often simplified

More information

Composite Video Separation Techniques

Composite Video Separation Techniques TM Composite Video Separation Techniques Application Note October 1996 AN9644 Author: Stephen G. LaJeunesse Introduction The most fundamental job of a video decoder is to separate the color from the black

More information

SOMERS POINT BRAND IDENTITY STYLE GUIDE

SOMERS POINT BRAND IDENTITY STYLE GUIDE SOMERS POINT BRAND IDENTITY STYLE GUIDE WHAT IT IS The new Somers Point logo will be the single most recognizable icon used to represent our City. WHY IT MATTERS Our logo immediately identifies our brand.

More information

Graphic Design Basics. Shannon B. Neely. Pacific Northwest National Laboratory Graphics and Multimedia Design Group

Graphic Design Basics. Shannon B. Neely. Pacific Northwest National Laboratory Graphics and Multimedia Design Group Graphic Design Basics Shannon B. Neely Pacific Northwest National Laboratory Graphics and Multimedia Design Group The Design Grid What is a Design Grid? A series of horizontal and vertical lines that evenly

More information

Improved predictive modeling of white LEDs with accurate luminescence simulation and practical inputs

Improved predictive modeling of white LEDs with accurate luminescence simulation and practical inputs Improved predictive modeling of white LEDs with accurate luminescence simulation and practical inputs TracePro Opto-Mechanical Design Software s Fluorescence Property Utility TracePro s Fluorescence Property

More information

The Information Processing model

The Information Processing model The Information Processing model A model for understanding human cognition. 1 from: Wickens, Lee, Liu, & Becker (2004) An Introduction to Human Factors Engineering. p. 122 Assumptions in the IP model Each

More information

Color Theory. Tips & Tricks. Why do some colors work better together than others? More available at artbeats.com. by Chris & Trish Meyer, Crish Design

Color Theory. Tips & Tricks. Why do some colors work better together than others? More available at artbeats.com. by Chris & Trish Meyer, Crish Design Color Theory by Chris & Trish Meyer, Crish Design Figure 1a Why do some colors work better together than others? Ah, the joys of being able to create moving media all by ourselves: Not only do we need

More information

Art Education Color Theory on the Computer Patricia Johnson Computer Graphics Education Consultant

Art Education Color Theory on the Computer Patricia Johnson Computer Graphics Education Consultant Art Education Color Theory on the Computer Patricia Johnson Computer Graphics Education Consultant Contents 1. Teacher Statement 2. Course Overview Course Description Bibliography Adobe software list 3.

More information

Color Balancing Techniques

Color Balancing Techniques Written by Jonathan Sachs Copyright 1996-1999 Digital Light & Color Introduction Color balancing refers to the process of removing an overall color bias from an image. For example, if an image appears

More information

Perception of Light and Color

Perception of Light and Color Perception of Light and Color Theory and Practice Trichromacy Three cones types in retina a b G+B +R Cone sensitivity functions 100 80 60 40 20 400 500 600 700 Wavelength (nm) Short wavelength sensitive

More information

Conceptual Physics Review (Chapters 25, 26, 27 & 28) Chapter 25 Describe the period of a pendulum. Describe the characteristics and properties of

Conceptual Physics Review (Chapters 25, 26, 27 & 28) Chapter 25 Describe the period of a pendulum. Describe the characteristics and properties of Conceptual Physics Review (Chapters 25, 26, 27 & 28) Solutions Chapter 25 Describe the period of a pendulum. Describe the characteristics and properties of waves. Describe wave motion. Describe factors

More information

BASIC CONCEPTS OF HAIR PHYSIOLOGY AND COSMETIC HAIR DYES

BASIC CONCEPTS OF HAIR PHYSIOLOGY AND COSMETIC HAIR DYES Staple here TECHNICAL MANUAL BASIC CONCEPTS OF HAIR PHYSIOLOGY AND COSMETIC HAIR DYES COVER PAGE MACRO-STRUCTURE OF THE HAIR The hair is formed by the shaft and the piliferous bulb. The visible part of

More information

A Proposal for OpenEXR Color Management

A Proposal for OpenEXR Color Management A Proposal for OpenEXR Color Management Florian Kainz, Industrial Light & Magic Revision 5, 08/05/2004 Abstract We propose a practical color management scheme for the OpenEXR image file format as used

More information

How many PIXELS do you need? by ron gibbs

How many PIXELS do you need? by ron gibbs How many PIXELS do you need? by ron gibbs We continue to move forward into the age of digital photography. The basic building block of digital images is the PIXEL which is the shorthand for picture element.

More information

Light Waves and Matter

Light Waves and Matter Name: Light Waves and Matter Read from Lesson 2 of the Light Waves and Color chapter at The Physics Classroom: http://www.physicsclassroom.com/class/light/u12l2a.html MOP Connection: Light and Color: sublevel

More information

Escaping RGBland: Selecting Colors for Statistical Graphics

Escaping RGBland: Selecting Colors for Statistical Graphics Escaping RGBland: Selecting Colors for Statistical Graphics Achim Zeileis, Kurt Hornik, Paul Murrell http://statmath.wu.ac.at/~zeileis/ Overview Motivation Color in statistical graphics Challenges Illustrations

More information

Color Theory for Floral Design

Color Theory for Floral Design Color Theory for Floral Design Essential Questions: Why would a floral designer need to have an understanding of color theory? How is color used to create floral designs? How can color be used for store

More information

A Guide to Understanding Color Communication

A Guide to Understanding Color Communication A Guide to Understanding Color Communication Table of Contents Communicating Color................................... 2 Ways to Measure Color.................................. 3 Integrated Color Throughout

More information

The Physiology of the Senses Lecture 1 - The Eye www.tutis.ca/senses/

The Physiology of the Senses Lecture 1 - The Eye www.tutis.ca/senses/ The Physiology of the Senses Lecture 1 - The Eye www.tutis.ca/senses/ Contents Objectives... 2 Introduction... 2 Accommodation... 3 The Iris... 4 The Cells in the Retina... 5 Receptive Fields... 8 The

More information

Studying Color Blending Perception for Data Visualization

Studying Color Blending Perception for Data Visualization Eurographics Conference on Visualization (EuroVis) (2014) N. Elmqvist, M. Hlawitschka, and J. Kennedy (Editors) Short Papers Studying Color Blending Perception for Data Visualization S. Gama 1 and D. Gonçalves

More information

Experiment #5: Qualitative Absorption Spectroscopy

Experiment #5: Qualitative Absorption Spectroscopy Experiment #5: Qualitative Absorption Spectroscopy One of the most important areas in the field of analytical chemistry is that of spectroscopy. In general terms, spectroscopy deals with the interactions

More information

Thank you for choosing NCS Colour Services, annually we help hundreds of companies to manage their colours. We hope this Colour Definition Report

Thank you for choosing NCS Colour Services, annually we help hundreds of companies to manage their colours. We hope this Colour Definition Report Thank you for choosing NCS Colour Services, annually we help hundreds of companies to manage their colours. We hope this Colour Definition Report will support you in your colour management process and

More information

What Saunders and van Brakel chose to ignore in Color and Cognition Research.

What Saunders and van Brakel chose to ignore in Color and Cognition Research. Kimberly A. Jameson Assistant Professor Department of Psychology University of California, San Diego 9500 Gilman Drive La Jolla, CA 92093-0109 kjameson@ucsd.edu What Saunders and van Brakel chose to ignore

More information

Scanners and How to Use Them

Scanners and How to Use Them Written by Jonathan Sachs Copyright 1996-1999 Digital Light & Color Introduction A scanner is a device that converts images to a digital file you can use with your computer. There are many different types

More information

A Guide to. Understanding Graphic Arts Densitometry

A Guide to. Understanding Graphic Arts Densitometry A Guide to Understanding Graphic Arts Densitometry Table of Contents Transmission Densitometry...... Color Reflection Densitometry Reflection Density... Dot Area/Dot Gain (Tone Value/Tone Value Increase)...

More information

Spectrophotometry and the Beer-Lambert Law: An Important Analytical Technique in Chemistry

Spectrophotometry and the Beer-Lambert Law: An Important Analytical Technique in Chemistry Spectrophotometry and the Beer-Lambert Law: An Important Analytical Technique in Chemistry Jon H. Hardesty, PhD and Bassam Attili, PhD Collin College Department of Chemistry Introduction: In the last lab

More information

The Power of Colour. aniva

The Power of Colour. aniva The Power of Colour. aniva Preface aniva enables images to be printed on the basis of image data within the colour gamut of photographic prints. Lithography and colour management are adapted in addition

More information

Logo Standards Guideline

Logo Standards Guideline Logo Standards Guideline TABLE OF CONTENTS Nurturing The Brand 1 Logo Guidelines 2 Correct Usage 2 Color Guidelines 6 How to Use the Provided Logo Files 9 Glossary 10 NURTURING THE BRAND THE FOLLOWING

More information

MANAGING COLOR IN A GLOBAL PRINT WORKFLOW MANAGING COLOR IN A PRINT WORKFLOW

MANAGING COLOR IN A GLOBAL PRINT WORKFLOW MANAGING COLOR IN A PRINT WORKFLOW MANAGING COLOR IN A GLOBAL PRINT WORKFLOW MANAGING COLOR IN A G L O B A L PRINT WORKFLOW M A N A G I N G C O L O R I N A G L O B A L P R I N T W O R K F L O W Copyright 2001 Gretag-Macbeth AG. All rights

More information

Printers and graphic arts service

Printers and graphic arts service SS Number 84 A reprint from GATFWorld, the magazine of the Graphic Arts Technical Foundation An Introduction to Appearance Analysis by Richard W. Harold Printers and graphic arts service providers who

More information

APPLICATION NOTES: Dimming InGaN LED

APPLICATION NOTES: Dimming InGaN LED APPLICATION NOTES: Dimming InGaN LED Introduction: Indium gallium nitride (InGaN, In x Ga 1-x N) is a semiconductor material made of a mixture of gallium nitride (GaN) and indium nitride (InN). Indium

More information

Nederland België / Belgique

Nederland België / Belgique Cronus Brochure 2 Introduction Cronus: The first spectrometer and colorimeter in one The Cronus is world s first spectrocolorimeter combining a high en VIS spectrometer with a high speed XYZ colorimeter.

More information

DESIGN ELEMENTS OF DESIGN

DESIGN ELEMENTS OF DESIGN DESIGN Definition of Design: The term has different connotations in different fields. Informally, a design refers to a plan for the construction of an object (as in architectural blueprints and sewing

More information

2C: One in a Million. Part 1: Making solutions. Name: Section: Date: Materials

2C: One in a Million. Part 1: Making solutions. Name: Section: Date: Materials Name: Section: Date: 2C: One in a Million Drinking water can contain up to 1.3 parts per million (ppm) of copper and still be considered safe. What does parts per million mean? Both living things and the

More information

TCS DIGITAL COLOR WHEEL VERSION 4.1 USER GUIDE

TCS DIGITAL COLOR WHEEL VERSION 4.1 USER GUIDE TCS DIGITAL COLOR WHEEL VERSION 4.1 USER GUIDE We provide this TCS User Guide for our members as well as persons who would like to know more about the functionality before subscribing to TCS Color Match

More information

Technical Paper DENTAL MONITOR CALIBRATION

Technical Paper DENTAL MONITOR CALIBRATION Technical Paper DENTAL MONITOR CALIBRATION A REPORT ON DENTAL IMAGE PRESENTATION By Tom Schulte Dental radiographs and oral photographs are often both viewed on the same dental workstation monitor. The

More information

Automatic and Objective Measurement of Residual Stress and Cord in Glass

Automatic and Objective Measurement of Residual Stress and Cord in Glass Automatic and Objective Measurement of Residual Stress and Cord in Glass GlassTrend - ICG TC15/21 Seminar SENSORS AND PROCESS CONTROL 13-14 October 2015, Eindhoven Henning Katte, ilis gmbh copyright ilis

More information

Paint Database Guide. Paint Database Guide. Color iqc and Color imatch Paint Database Guide. Version 8.0 July 2012. 30 July 2012 Revision 1.

Paint Database Guide. Paint Database Guide. Color iqc and Color imatch Paint Database Guide. Version 8.0 July 2012. 30 July 2012 Revision 1. Color iqc and Color imatch Version 8.0 July 2012 1 Table of Contents Step 1 Review General Requirements...3 Homogeneity...3 Reproducibility...3 Representative...3 Accuracy...3 Sample preparation process...4

More information

Colour Science Typography Frontend Dev

Colour Science Typography Frontend Dev Colour Science Typography Frontend Dev Name Kevin Eger Who am I? Why should you listen to anything I say? Summary What the next hour of your life looks like Colour Science Typography Frontend Dev 1. 2.

More information

How To Color In A Computer Graphics Program

How To Color In A Computer Graphics Program Color is the most relative medium in art. Josef Albers, Interaction of Color Designing Colors for Data Maureen Stone StoneSoup Consulting yellow Good painting, good coloring, is comparable to good cooking.

More information

Color. & the CIELAB. System

Color. & the CIELAB. System Color & the CIELAB System An Interpretation of the CIELAB System olor perception has been debated for many years and, as in any evaluation that relies on human senses, the essence of analysis remains subjective.

More information

The COLORSHOP Color Primer An Introduction to the History of Color, Color Theory, and Color Measurement

The COLORSHOP Color Primer An Introduction to the History of Color, Color Theory, and Color Measurement Fred Bunting Light Source Computer Images, Inc. An X-Rite Company The COLORSHOP Color Primer An Introduction to the History of Color, Color Theory, and Color Measurement COPYRIGHT 1998 Light Source Computer

More information

A Adobe RGB (1998) Color Image Encoding. Version 2005-05 May 2005

A Adobe RGB (1998) Color Image Encoding. Version 2005-05 May 2005 Adobe RGB (1998) Color Image Encoding Version 2005-05 May 2005 ADOBE SYSTEMS INCORPORATED Corporate Headquarters 345 Park Avenue San Jose, CA 95110-2704 (408) 536-6000 http://www.adobe.com Copyright 2005

More information

Prepared by: Paul Lee ON Semiconductor http://onsemi.com

Prepared by: Paul Lee ON Semiconductor http://onsemi.com Introduction to Analog Video Prepared by: Paul Lee ON Semiconductor APPLICATION NOTE Introduction Eventually all video signals being broadcasted or transmitted will be digital, but until then analog video

More information

Planetary Filters for Small Telescopes

Planetary Filters for Small Telescopes Planetary Filters for Small Telescopes Erwin Matys, Karoline Mrazek During our observing career of several decades the universe was very generous to us: We witnessed a comet impact on Jupiter, we saw frosty

More information

Computer Graphics. Coursework. Overview. Programming Assignments. Art Contest. Administrative Matters. Exams (30%) In class (Mar 11 and Apr 29)

Computer Graphics. Coursework. Overview. Programming Assignments. Art Contest. Administrative Matters. Exams (30%) In class (Mar 11 and Apr 29) Coursework Computer Graphics Thomas Funkhouser Princeton University COS 426, Spring 2004 Exams (30%) In class (Mar 11 and Apr 29) Programming Assignments (40%) Assignment #1: Image Processing (due Feb

More information

COLOR THEORY WORKSHEET

COLOR THEORY WORKSHEET COLOR THEORY WORKSHEET Use color pencils to complete the following exercises Name: Period Date PRIMARY COLORS cannot be made from any combination of colors. Fade intensity from top left to bottom right

More information

APPLICATIONS AND USAGE

APPLICATIONS AND USAGE APPLICATIONS AND USAGE http://www.tutorialspoint.com/dip/applications_and_usage.htm Copyright tutorialspoint.com Since digital image processing has very wide applications and almost all of the technical

More information

Calibration Best Practices

Calibration Best Practices Calibration Best Practices for Manufacturers SpectraCal, Inc. 17544 Midvale Avenue N., Suite 100 Shoreline, WA 98133 (206) 420-7514 info@spectracal.com http://studio.spectracal.com Calibration Best Practices

More information

1051-232 Imaging Systems Laboratory II. Laboratory 4: Basic Lens Design in OSLO April 2 & 4, 2002

1051-232 Imaging Systems Laboratory II. Laboratory 4: Basic Lens Design in OSLO April 2 & 4, 2002 05-232 Imaging Systems Laboratory II Laboratory 4: Basic Lens Design in OSLO April 2 & 4, 2002 Abstract: For designing the optics of an imaging system, one of the main types of tools used today is optical

More information

UNDERSTANDING DIFFERENT COLOUR SCHEMES MONOCHROMATIC COLOUR

UNDERSTANDING DIFFERENT COLOUR SCHEMES MONOCHROMATIC COLOUR UNDERSTANDING DIFFERENT COLOUR SCHEMES MONOCHROMATIC COLOUR Monochromatic Colours are all the Colours (tints, tones and shades) of a single hue. Monochromatic colour schemes are derived from a single base

More information

Computer Vision: Machine Vision Filters. Computer Vision. Optical Filters. 25 August 2014

Computer Vision: Machine Vision Filters. Computer Vision. Optical Filters. 25 August 2014 Computer Vision Optical Filters 25 August 2014 Copyright 2001 2014 by NHL Hogeschool, Van de Loosdrecht Machine Vision BV and Klaas Dijkstra All rights reserved j.van.de.loosdrecht@nhl.nl, jaap@vdlmv.nl,

More information

Understanding HD: Frame Rates, Color & Compression

Understanding HD: Frame Rates, Color & Compression Understanding HD: Frame Rates, Color & Compression HD Format Breakdown An HD Format Describes (in no particular order) Resolution Frame Rate Bit Rate Color Space Bit Depth Color Model / Color Gamut Color

More information

The Modeling of Harmonious Color Combinations for improved Usability and UX

The Modeling of Harmonious Color Combinations for improved Usability and UX The Modeling of Harmonious Color Combinations for improved Usability and UX Christian Stickel Karin Maier Martin Ebner Andreas Holzinger Social Learning Graz Univ. of Technology Steyrergasse 30/I, A-8010

More information

Computation and visualization of the MacAdam limits for any lightness, hue angle, and light source

Computation and visualization of the MacAdam limits for any lightness, hue angle, and light source Martínez-Verdú et al. Vol. 24, No. 6/June 2007/ J. Opt. Soc. Am. A 1501 Computation and visualization of the MacAdam limits for any lightness, hue angle, and light source Francisco Martínez-Verdú, Esther

More information

THE BOHR QUANTUM MODEL

THE BOHR QUANTUM MODEL THE BOHR QUANTUM MODEL INTRODUCTION When light from a low-pressure gas is subject to an electric discharge, a discrete line spectrum is emitted. When light from such a low-pressure gas is examined with

More information

Accurately Reproducing Pantone Colors on Digital Presses. By Anne Howard

Accurately Reproducing Pantone Colors on Digital Presses. By Anne Howard 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

More information

Seeing in black and white

Seeing in black and white 1 Adobe Photoshop CS One sees differently with color photography than black and white...in short, visualization must be modified by the specific nature of the equipment and materials being used Ansel Adams

More information

Lou Freeman. and. More Colors. More Versatility.

Lou Freeman. and. More Colors. More Versatility. Lou Freeman and More Colors. More Versatility. September, 2011 Contents Page Contents Page The Category Remains Strong 3 The Next Generation ENDURA 4 What This Means for Pro Labs 5 Features & Benefits

More information