skip chap. 8 for now Chap. 9 Color (continued) Lecture 19 Tuesday, October 26
|
|
- Sharleen Harrington
- 6 years ago
- Views:
Transcription
1 skip chap. 8 for now Chap. 9 Color (continued) Lecture 19 Tuesday, October 26 Next time: Chapter 10, start reading. Nov. 2: exam review Nov. 4: exam II There are computer problems with clicker registration. Be patient. 1 Ch. 9 - Color We are here Spectral and non-spectral colors Intensity distribution curve Intensity, hue, saturation Additive primaries: R, G. B. Subtractive primaries: C, M, Y Hair, skin, and eye color CIE diagram Lighting, painting and printing Start Chapter 10, color perception. 2
2 CIE diagram (International Commission on Illumination) This is a color triangle with Green at the top, Blue at lower left, Red at (lower) right x,y positions on the color triangle represent all the colors that can be reproduced by adding red, green and blue. Limitation: darkness is missing. To be complete you must also specify lightness or brightness. 3 White: X = 1/3 Y = 1/3 Less saturated colors are near the center Spectral color wavelengths are at the left and right edges Non spectral colors are at this edge 4
3 Projection (additive) TV systems can only reproduce colors inside the triangle between the 3 colors of the sources (dots). 5 Comparison of old TV phosphors with LEDs (light emitting diodes) 6
4 Properties of the CIE diagram The spectral colors are on the left and right edges Equal mixing of two spectral colors on the edge makes the color half way between these two colors (on the line joining the two colors.) Where is magenta on the diagram? It is half way across the bottom, which is an equal mixture of red and blue. Where is cyan? What s great about this diagram: two numbers, x and y, can be used to describe a color. What s missing from the C.I.E. diagram? Because the colors are adjusted to add to 100%, dark colors (that total less than 100%) aren t represented, for example, black and brown. 7 Alternate diagram: Munsell s color tree: Hue, value and chroma an alternate way to indicate color that includes brightness Compare to: 8
5 Ink transmission curves Magenta = white green 100% 400 nm 500 nm 600 nm 700 nm 9 Ink transmission curves Cyan = white red 100% 400 nm 500 nm 600 nm 700 nm 10
6 Ink transmission curves Yellow ink (unsaturated) = white blue (contains green, yellow, orange and red) 100% 400 nm 500 nm 600 nm 700 nm 11 Additive and subtractive color mixing Why does one figure have a black interior and the other is white? 12
7 Ch. 9 - Color We are here Spectral and non-spectral colors Intensity distribution curve Intensity, hue, saturation Additive primaries: R, G. B. Subtractive primaries: C, M, Y Hair, skin, and eye color CIE diagram Lighting, painting and printing 13 Methods of adding colors 1. Addition of illumination: stage lighting and 3-color TV projector. Projected colors overlap. 2. Partitive mixing: closely spaced dots of colors. TV screens, laptop screens, pointillist paintings, tight textile weaves, some printing 3. Time mixing: a rotating color wheel. It s hard to find examples. 4. Binocular mixing: different color to each eye. The colors "blend" in the brain. 14
8 Partitive mixing is placing colors next to one another so that they are merged in the eye. Examples: Pointillist painting LCD screens Old TV screens (CRT) Plasma TVs Detail from Circus Sideshow (or Parade de Cirque) (1889) showing pointillism Georges Seurat 15 Georges Seurat, Sunday Afternoon on the Island of La Grande Jatte, , The Art Institute of Chicago. 16
9 Sources of light, color balance Color balance important for movies and stage lighting. White light should contain equal amounts R, G and B but often does not. Examples of odd (unbalanced) lighting: Candles and campfires contain an excess of red. So do sunsets and tungsten bulbs. Some street lamps (low pressure sodium, for example) contain only a few wavelengths. All other colors are missing. When red is missing, red lipstick looks black. Demo: blue light with red, white, and blue papers 17 Color temperature The temperature of light bulb determines the relative amount of red. Cooler bulbs have more red than hotter bulbs. A lamp can be characterized by its temperature Sun, 5000 K (has a lot of blue) Photoflood lamp, 3200 K, an approximation of sunlight Tungsten lamp, 2850 K, looks orange, less blue. Candle, 1800 K, distinctly red, almost no blue. Color film is balanced for daylight. Photos made by candlelight or ordinary tungsten lamps will look unnaturally red. Demo: blue and red filter with dimmed bulb 18
10 Ch. 9 - Color Spectral and non-spectral colors Intensity distribution curve Intensity, hue, saturation Additive primaries: R, G. B. Subtractive primaries: C, M, Y Hair, skin, and eye color CIE diagram Lighting, painting and printing We are here 19 Printing Ink jet printers use four inks: cyan, magenta, yellow, and black. These are often called CMYK printers, with K for black. Ink on the paper acts as a filter for light reflected from paper. Combinations of C, M, and Y can make all colors by filtration. Black is needed for darker blacks. High brightness paper is needed for good pictures. Six color printing adds additional inks to CMYK. Some use red and blue, others use light cyan and light magenta. Canon has an 11 ink printer. Watercolors work the same way. Putting on more results in more light being absorbed, so a brighter blue requires less watercolor and a darker one more. 20
11 Recall that inks act like filters A colored filter subtracts certain colors by absorption and transmits the rest = Incident white light Magenta filter subtracts green Cyan filter subtracts red Only blue gets through Halftone printing Halftones (black and white): The printing plate is covered with dots of different size with the bigger dots putting more ink than the smaller dots. Halftones (color) There is a different halftone printing plate for each of the subtractive primaries. High quality color printing (National Geographic, art books) use more than four inks. Print resolution is measured in dots per inch. More dots/inch = more detail. Typical inkjet: 600 dots per inch but 1200 to 4800 dots per inch (dpi) is possible 22
12 Halftone printing black and white Size of dots determines amount of black ink. Newspapers had 85 lines of dots per inch. Wikipedia Magnified view First half tone Halftone printing - color Where would I see this? Sunday comics. 24
13 Halftone printing - color Cyan = -red Magenta = -green Yellow = -blue This is the final printed product of adding the 4 above images. Magazines use this method. Wikipedia 25 Zoom in on a color half tone. 26
14 End - Ch. 9 - Color Spectral and non-spectral colors Intensity distribution curve Intensity, hue, saturation Additive primaries: R, G. B. Subtractive primaries: C, M, Y Hair, skin, and eye color CIE diagram Lighting, painting and printing We are here 27 Paint Paints: consist of pigment particles in a liquid vehicle. The vehicle may dry to a glossy or matte finish. The vehicle may be clear or it may contain dye. Dye is colored at the molecular level, no solid particles. Pigment flakes may be partially transparent and work by selective absorption or they may be opaque and work by selective reflection. The size of the particle makes a difference, with smaller particles transmitting more and absorbing less. Paints appear different (often brighter) when wet because a wet surface is glossy. 28
15 Surfaces, glossy and matte Photographs can have a glossy or matte finish and so can house paint. Paint can also be semi-gloss (looks frosted ). Glossy surfaces are smooth and part of the light is reflected specularly (like from a mirror) and part is reflected diffusely. Glossy surfaces look brighter. Wet surfaces tend to be glossy, so all paints are glossy when they go on and may become matte as they dry. 29 Chapter 10: Color perception We are here Trichromacy Metamers Psychological primaries Channels Color deficiency Animal vision Temporal processing 30
16 Trichromacy You have 3 kinds of color receptors (cones) Wavelengths: Short Intermediate Long We know this because we can find the wavelengths absorbed by the cones. Fig in textbook. 31 Metamers (again) Yellow (600) looks like red (650) + green (550) No mixture will look like blue or red. 32
17 Why blue+yellow looks white S+I+L stimulated is the same stimulation as from white light 33 How colors are perceived Blue excites S receptors Cyan excites S + I Green excites I mostly Yellow excites I + L Orange excites I + L Red excites L 34
18 Sensitivity of cones 35
Take a break: Watch some stop-motion animation Music: Grindin
Take a break: Watch some stop-motion animation Music: Grindin http://vimeo.com/9625370 1 skip chap. 8 for now Chap. 9 Color (continued) Lecture 18 Thursday, March 11 Next week: Chapter 10, start reading.
More informationPhysics 1230: Light and Color. If you do not have a telescope, please come get the parts on front table. Useful for Written_HW12.
Physics 1230: Light and Color Chuck Rogers, Charles.Rogers@colorado.edu Ryan Henley, Valyria McFarland, Peter Siegfried physicscourses.colorado.edu/phys1230 If you do not have a telescope, please come
More informationexcite the cones in the same way.
Humans have 3 kinds of cones Color vision Edward H. Adelson 9.35 Trichromacy To specify a light s spectrum requires an infinite set of numbers. Each cone gives a single number (univariance) when stimulated
More informationColor Mixing. Color Systems and Additive and Subtractive Colors. MODIFIED FROM Dr. Patricia Hill, Millersville University
Color Mixing Color Systems and Additive and Subtractive Colors MODIFIED FROM Dr. Patricia Hill, Millersville University Describing Color Color Attributes Hue (color) Brightness Saturation or Purity corresponds
More informationTest 1: Example #2. Paul Avery PHY 3400 Feb. 15, Note: * indicates the correct answer.
Test 1: Example #2 Paul Avery PHY 3400 Feb. 15, 1999 Note: * indicates the correct answer. 1. A red shirt illuminated with yellow light will appear (a) orange (b) green (c) blue (d) yellow * (e) red 2.
More informationColor Reproduction. Chapter 6
Chapter 6 Color Reproduction Take a digital camera and click a picture of a scene. This is the color reproduction of the original scene. The success of a color reproduction lies in how close the reproduced
More informationWhat is Color? Chapter 9: Color. Color Mixtures. Color Mixtures 10/29/2012. What is color? Color vocabulary
What is color? Color vocabulary Chapter 9: Color Color mixtures Intensity-distribution curves Specifying colors Hue, saturation and brightness Color trees RGB color specification Chromaticity What is Color?
More informationMultimedia Systems and Technologies
Multimedia Systems and Technologies Faculty of Engineering Master s s degree in Computer Engineering Marco Porta Computer Vision & Multimedia Lab Dipartimento di Ingegneria Industriale e dell Informazione
More informationMultimedia Systems Color Space Mahdi Amiri March 2012 Sharif University of Technology
Course Presentation Multimedia Systems Color Space Mahdi Amiri March 2012 Sharif University of Technology Physics of Color Light Light or visible light is the portion of electromagnetic radiation that
More informationColor & Graphics. Color & Vision. The complete display system is: We'll talk about: Model Frame Buffer Screen Eye Brain
Color & Graphics The complete display system is: Model Frame Buffer Screen Eye Brain Color & Vision We'll talk about: Light Visions Psychophysics, Colorimetry Color Perceptually based models Hardware models
More informationDigital Images. CCST9015 Oct 13, 2010 Hayden Kwok-Hay So
Digital Images CCST9015 Oct 13, 2010 Hayden Kwok-Hay So 1983 Oct 13, 2010 2006 Digital Images - CCST9015 - H. So 2 Demystifying Digital Images Representation Hardware Processing 3 Representing Images R
More informationThe Principles of Chromatics
The Principles of Chromatics 03/20/07 2 Light Electromagnetic radiation, that produces a sight perception when being hit directly in the eye The wavelength of visible light is 400-700 nm 1 03/20/07 3 Visible
More informationForm 4: Integrated Science Notes TOPIC NATURAL AND ARTIFICIAL LIGHTING
Form 4: Integrated Science Notes TOPIC NATURAL AND ARTIFICIAL LIGHTING OBJECTIVES: 1. Define natural and artificial lighting. 2. Use of fluorescent and filament lamps. 3. Investigation of white light and
More informationColor vision and representation
Color vision and representation S M L 0.0 0.44 0.52 Mark Rzchowski Physics Department 1 Eye perceives different wavelengths as different colors. Sensitive only to 400nm - 700 nm range Narrow piece of the
More informationColor Image Processing. Gonzales & Woods: Chapter 6
Color Image Processing Gonzales & Woods: Chapter 6 Objectives What are the most important concepts and terms related to color perception? What are the main color models used to represent and quantify color?
More informationColor theory Quick guide for graphic artists
Quick guide for graphic artists We can talk about color using two kinds of terminology: Color generation systems. Color harmony system. Graphic artists and photographers certainly have to understand color
More informationChapter 9: Color. What is Color? Wavelength is a property of an electromagnetic wave in the frequency range we call light
Chapter 9: Color What is color? Color mixtures Intensity-distribution curves Additive Mixing Partitive Mixing Specifying colors RGB Color Chromaticity What is Color? Wavelength is a property of an electromagnetic
More informationComparing Sound and Light. Light and Color. More complicated light. Seeing colors. Rods and cones
Light and Color Eye perceives EM radiation of different wavelengths as different colors. Sensitive only to the range 4nm - 7 nm This is a narrow piece of the entire electromagnetic spectrum. Comparing
More informationMatch the correct description with the correct term. Write the letter in the space provided.
Skills Worksheet Directed Reading A Section: Interactions of Light with Matter REFLECTION Write the letter of the correct answer in the space provided. 1. What happens when light travels through a material
More informationColour. Cunliffe & Elliott, Chapter 8 Chapman & Chapman, Digital Multimedia, Chapter 5. Autumn 2016 University of Stirling
CSCU9N5: Multimedia and HCI 1 Colour What is colour? Human-centric view of colour Computer-centric view of colour Colour models Monitor production of colour Accurate colour reproduction Cunliffe & Elliott,
More informationVisual Imaging and the Electronic Age Color Science
Visual Imaging and the Electronic Age Color Science Grassman s Experiments & Trichromacy Lecture #5 September 5, 2017 Prof. Donald P. Greenberg Light as Rays Light as Waves Light as Photons What is Color
More informationColour. Why/How do we perceive colours? Electromagnetic Spectrum (1: visible is very small part 2: not all colours are present in the rainbow!
Colour What is colour? Human-centric view of colour Computer-centric view of colour Colour models Monitor production of colour Accurate colour reproduction Colour Lecture (2 lectures)! Richardson, Chapter
More informationMahdi Amiri. March Sharif University of Technology
Course Presentation Multimedia Systems Color Space Mahdi Amiri March 2014 Sharif University of Technology The wavelength λ of a sinusoidal waveform traveling at constant speed ν is given by Physics of
More informationImage and video processing (EBU723U) Colour Images. Dr. Yi-Zhe Song
Image and video processing () Colour Images Dr. Yi-Zhe Song yizhe.song@qmul.ac.uk Today s agenda Colour spaces Colour images PGM/PPM images Today s agenda Colour spaces Colour images PGM/PPM images History
More informationColour. Electromagnetic Spectrum (1: visible is very small part 2: not all colours are present in the rainbow!) Colour Lecture!
Colour Lecture! ITNP80: Multimedia 1 Colour What is colour? Human-centric view of colour Computer-centric view of colour Colour models Monitor production of colour Accurate colour reproduction Richardson,
More informationUnderstand brightness, intensity, eye characteristics, and gamma correction, halftone technology, Understand general usage of color
Understand brightness, intensity, eye characteristics, and gamma correction, halftone technology, Understand general usage of color 1 ACHROMATIC LIGHT (Grayscale) Quantity of light physics sense of energy
More informationReading for Color. Vision/Color. RGB Color. Vision/Color. University of British Columbia CPSC 314 Computer Graphics Jan-Apr 2013.
University of British Columbia CPSC 314 Computer Graphics Jan-Apr 2013 Tamara Munzner Vision/Color Reading for Color RB Chap Color FCG Sections 3.2-3.3 FCG Chap 20 Color FCG Chap 21.2.2 Visual Perception
More informationAdditive. Subtractive
Physics 106 Additive Subtractive Subtractive Mixing Rules: Mixing Cyan + Magenta, one gets Blue Mixing Cyan + Yellow, one gets Green Mixing Magenta + Yellow, one gets Red Mixing any two of the Blue, Red,
More informationSlide 1. Slide 2. Slide 3. Light and Colour. Sir Isaac Newton The Founder of Colour Science
Slide 1 the Rays to speak properly are not coloured. In them there is nothing else than a certain Power and Disposition to stir up a Sensation of this or that Colour Sir Isaac Newton (1730) Slide 2 Light
More informationConceptual Physics 11 th Edition
Conceptual Physics 11 th Edition Chapter 27: COLOR This lecture will help you understand: Color in Our World Selective Reflection Selective Transmission Mixing Colored Light Mixing Colored Pigments Why
More informationUniversity of British Columbia CPSC 314 Computer Graphics Jan-Apr Tamara Munzner. Color.
University of British Columbia CPSC 314 Computer Graphics Jan-Apr 2016 Tamara Munzner Color http://www.ugrad.cs.ubc.ca/~cs314/vjan2016 Vision/Color 2 RGB Color triple (r, g, b) represents colors with amount
More informationLecture 30 Chapter 26 The Human Eye & Visual Perception. Chapter 27 Color
Lecture 30 Chapter 26 The Human Eye & Visual Perception Chapter 27 Color 4-Nov-10 The Eye As light enters the eye, it moves through the transparent cover, the cornea, which does about 70% of the necessary
More informationCOLOR and the human response to light
COLOR and the human response to light Contents Introduction: The nature of light The physiology of human vision Color Spaces: Linear Artistic View Standard Distances between colors Color in the TV 2 How
More informationPsy 280 Fall 2000: Color Vision (Part 1) Oct 23, Announcements
Announcements 1. This week's topic will be COLOR VISION. DEPTH PERCEPTION will be covered next week. 2. All slides (and my notes for each slide) will be posted on the class web page at the end of the week.
More informationThursday, May 19, 16. Color Theory
Color Theory Which colours is white light made of? Did you know?! Your eyes have only 3 types of cells that can recognize millions of colours.! When you observe a colour, it is because different combinations
More informationLight and Colour. Light as part of the EM spectrum. Light as part of the EM spectrum
Light and Colour Prof. Grega Bizjak, PhD Laboratory of Lighting and Photometry Faculty of Electrical Engineering University of Ljubljana Light as part of the EM spectrum Visible light can be seen as part
More informationColor and Color Model. Chap. 12 Intro. to Computer Graphics, Spring 2009, Y. G. Shin
Color and Color Model Chap. 12 Intro. to Computer Graphics, Spring 2009, Y. G. Shin Color Interpretation of color is a psychophysiology problem We could not fully understand the mechanism Physical characteristics
More informationCOLOR. and the human response to light
COLOR and the human response to light Contents Introduction: The nature of light The physiology of human vision Color Spaces: Linear Artistic View Standard Distances between colors Color in the TV 2 Amazing
More informationH10: Description of Colour
page 1 of 7 H10: Description of Colour Appearance of objects and materials Appearance attributes can be split into primary and secondary parts, as shown in Table 1. Table 1: The attributes of the appearance
More informationComputer Graphics Si Lu Fall /27/2016
Computer Graphics Si Lu Fall 2017 09/27/2016 Announcement Class mailing list https://groups.google.com/d/forum/cs447-fall-2016 2 Demo Time The Making of Hallelujah with Lytro Immerge https://vimeo.com/213266879
More informationIntroduction. The Spectral Basis for Color
Introduction Color is an extremely important part of most visualizations. Choosing good colors for your visualizations involves understanding their properties and the perceptual characteristics of human
More informationDigital Image Processing
Digital Image Processing 6. Color Image Processing Computer Engineering, Sejong University Category of Color Processing Algorithm Full-color processing Using Full color sensor, it can obtain the image
More informationChapter 16 Light Waves and Color
Chapter 16 Light Waves and Color Lecture PowerPoint Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. What causes color? What causes reflection? What causes color?
More informationInteractive Computer Graphics
Interactive Computer Graphics Lecture 4: Colour Graphics Lecture 4: Slide 1 Ways of looking at colour 1. Physics 2. Human visual receptors 3. Subjective assessment Graphics Lecture 4: Slide 2 The physics
More informationLight, Color, Spectra 05/30/2006. Lecture 17 1
What do we see? Light Our eyes can t t detect intrinsic light from objects (mostly infrared), unless they get red hot The light we see is from the sun or from artificial light When we see objects, we see
More informationPrinting Technology. Lecture 14 October 8, 2015 Imaging in the Electronic Age Donald P. Greenberg
Printing Technology Lecture 14 October 8, 2015 Imaging in the Electronic Age Donald P. Greenberg Color Additive Color Subtractive Color Additive & Subtractive Color Spaces Subtractive Reflection Processes
More informationConceptual Physics Fundamentals
Conceptual Physics Fundamentals Chapter 13: LIGHT WAVES This lecture will help you understand: Electromagnetic Spectrum Transparent and Opaque Materials Color Why the Sky is Blue, Sunsets are Red, and
More informationChapter Objectives. Color Management. Color Management. Chapter Objectives 1/27/12. Beyond Design
1/27/12 Copyright 2009 Fairchild Books All rights reserved. No part of this presentation covered by the copyright hereon may be reproduced or used in any form or by any means graphic, electronic, or mechanical,
More informationA Colorful Lab in a Bag
A Colorful Lab in a Bag In this lab you will explore color and color mixing. You will investigate the white light spectrum and examine ways in which color can be combined. One process of mixing color,
More information28 Color. The colors of the objects depend on the color of the light that illuminates them.
The colors of the objects depend on the color of the light that illuminates them. Color is in the eye of the beholder and is provoked by the frequencies of light emitted or reflected by things. We see
More informationRaster Graphics. Overview קורס גרפיקה ממוחשבת 2008 סמסטר ב' What is an image? What is an image? Image Acquisition. Image display 5/19/2008.
Overview Images What is an image? How are images displayed? Color models How do we perceive colors? How can we describe and represent colors? קורס גרפיקה ממוחשבת 2008 סמסטר ב' Raster Graphics 1 חלק מהשקפים
More informationקורס גרפיקה ממוחשבת 2008 סמסטר ב' Raster Graphics 1 חלק מהשקפים מעובדים משקפים של פרדו דוראנד, טומס פנקהאוסר ודניאל כהן-אור
קורס גרפיקה ממוחשבת 2008 סמסטר ב' Raster Graphics 1 חלק מהשקפים מעובדים משקפים של פרדו דוראנד, טומס פנקהאוסר ודניאל כהן-אור Images What is an image? How are images displayed? Color models Overview How
More informationDr. Shahanawaj Ahamad. Dr. S.Ahamad, SWE-423, Unit-06
Dr. Shahanawaj Ahamad 1 Outline: Basic concepts underlying Images Popular Image File formats Human perception of color Various Color Models in use and the idea behind them 2 Pixels -- picture elements
More informationAdditive Color Synthesis
Color Systems Defining Colors for Digital Image Processing Various models exist that attempt to describe color numerically. An ideal model should be able to record all theoretically visible colors in the
More informationImages and Colour COSC342. Lecture 2 2 March 2015
Images and Colour COSC342 Lecture 2 2 March 2015 In this Lecture Images and image formats Digital images in the computer Image compression and formats Colour representation Colour perception Colour spaces
More informationLight. intensity wavelength. Light is electromagnetic waves Laser is light that contains only a narrow spectrum of frequencies
Image formation World, image, eye Light Light is electromagnetic waves Laser is light that contains only a narrow spectrum of frequencies intensity wavelength Visible light is light with wavelength from
More informationDigital Image Processing COSC 6380/4393. Lecture 20 Oct 25 th, 2018 Pranav Mantini
Digital Image Processing COSC 6380/4393 Lecture 20 Oct 25 th, 2018 Pranav Mantini What is color? Color is a psychological property of our visual experiences when we look at objects and lights, not a physical
More informationBiology 70, Lecture 4, Part II Fall 2007
color another bad joke 1 2 from lecture outline: COLOR What s wrong here?????? 7. What property of light is responsible for color information? Under white light why does an opaque or translucent blue object
More informationLECTURE III: COLOR IN IMAGE & VIDEO DR. OUIEM BCHIR
1 LECTURE III: COLOR IN IMAGE & VIDEO DR. OUIEM BCHIR 2 COLOR SCIENCE Light and Spectra Light is a narrow range of electromagnetic energy. Electromagnetic waves have the properties of frequency and wavelength.
More informationToday. Color. Color and light. Color and light. Electromagnetic spectrum 2/7/2011. CS376 Lecture 6: Color 1. What is color?
Color Monday, Feb 7 Prof. UT-Austin Today Measuring color Spectral power distributions Color mixing Color matching experiments Color spaces Uniform color spaces Perception of color Human photoreceptors
More informationCIE tri-stimulus experiment. Color Value Functions. CIE 1931 Standard. Color. Diagram. Color light intensity for visual color match
CIE tri-stimulus experiment diffuse reflecting screen diffuse reflecting screen 770 769 768 test light 382 381 380 observer test light 445 535 630 445 535 630 observer light intensity for visual color
More informationIt s a Colorful Life
It s a Colorful Life Dr. Lawrence D. Woolf General Atomics San Diego CA 92121 Presented at the 2000 Southeastern College Art Conference/Mid-America College Art Association Meeting Foundations in Art Theory
More informationKODAK EKTACHROME RADIANCE III Paper
TECHNICAL DATA / COLOR PAPER February 2003 E-1766 KODAK EKTACHROME RADIANCE III Paper NOTICE Discontinuance of KODAK PROFESSIONAL EKTACHROME RADIANCE III Papers and Materials and KODAK EKTACHROME R-3 Chemicals
More information12/02/2017. From light to colour spaces. Electromagnetic spectrum. Colour. Correlated colour temperature. Black body radiation.
From light to colour spaces Light and colour Advanced Graphics Rafal Mantiuk Computer Laboratory, University of Cambridge 1 2 Electromagnetic spectrum Visible light Electromagnetic waves of wavelength
More informationSunderland, NE England
Sunderland, NE England Robert Grosseteste (1175-1253) Bishop of Lincoln Teacher of Francis Bacon Exhibit featuring color ideas of Robert Grosseteste Closes Saturday! Exactly 16 colors: (unnamed) White
More informationExercises The Color Spectrum (pages ) 28.2 Color by Reflection (pages )
Exercises 28.1 The Spectrum (pages 555 556) 1. 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. He studied sunlight.
More informationImages and Displays. Lecture Steve Marschner 1
Images and Displays Lecture 2 2008 Steve Marschner 1 Introduction Computer graphics: The study of creating, manipulating, and using visual images in the computer. What is an image? A photographic print?
More informationImage Representations, Colors, & Morphing. Stephen J. Guy Comp 575
Image Representations, Colors, & Morphing Stephen J. Guy Comp 575 Procedural Stuff How to make a webpage Assignment 0 grades New office hours Dinesh Teaching Next week ray-tracing Problem set Review Overview
More informationColor Perception. Color, What is It Good For? G Perception October 5, 2009 Maloney. perceptual organization. perceptual organization
G892223 Perception October 5, 2009 Maloney Color Perception Color What s it good for? Acknowledgments (slides) David Brainard David Heeger perceptual organization perceptual organization 1 signaling ripeness
More informationSection 18.3 Behavior of Light
Light and Materials When light hits an object it can be Section 18.3 Behavior of Light Light and Materials Objects can be classified as Transparent Translucent Opaque Transparent, Translucent, Opaque Transparent
More informationFigure 1: Energy Distributions for light
Lecture 4: Colour The physical description of colour Colour vision is a very complicated biological and psychological phenomenon. It can be described in many different ways, including by physics, by subjective
More informationColors in Images & Video
LECTURE 8 Colors in Images & Video CS 5513 Multimedia Systems Spring 2009 Imran Ihsan Principal Design Consultant OPUSVII www.opuseven.com Faculty of Engineering & Applied Sciences 1. Light and Spectra
More informationColor Theory. Additive Color
Color Theory A primary color is a color that cannot be made from a combination of any other colors. A secondary color is a color created from a combination of two primary colors. Tertiary color is a combination
More informationOur senses don t deceive us; our judgment does. Johann Wolfgang von Goethe
Our senses don t deceive us; our judgment does. Johann Wolfgang von Goethe 1 ULTRAVIOLET X-RAYS GAMMA RAYS VISIBLE MICROWAVES SPECTRUM INFRARED RADIO WAVES VIOLET BLUE CYAN GREEN YELLOW RED MAGENTA The
More informationLecture Color Image Processing. by Shahid Farid
Lecture Color Image Processing by Shahid Farid What is color? Why colors? How we see objects? Photometry, Radiometry and Colorimetry Color measurement Chromaticity diagram Shahid Farid, PUCIT 2 Color or
More informationColour Management Workflow
Colour Management Workflow The Eye as a Sensor The eye has three types of receptor called 'cones' that can pick up blue (S), green (M) and red (L) wavelengths. The sensitivity overlaps slightly enabling
More informationEECS490: Digital Image Processing. Lecture #12
Lecture #12 Image Correlation (example) Color basics (Chapter 6) The Chromaticity Diagram Color Images RGB Color Cube Color spaces Pseudocolor Multispectral Imaging White Light A prism splits white light
More informationCS 565 Computer Vision. Nazar Khan PUCIT Lecture 4: Colour
CS 565 Computer Vision Nazar Khan PUCIT Lecture 4: Colour Topics to be covered Motivation for Studying Colour Physical Background Biological Background Technical Colour Spaces Motivation Colour science
More informationReflection and Color
CHAPTER 16 13 SECTION Sound and Light Reflection and Color KEY IDEAS As you read this section, keep these questions in mind: What happens to light when it hits an object? Why can you see an image in a?
More informationPrinting Devices. Lecture 10. Older Printing Devices. Ink Jet Printer. Thermal-Bubble Ink Jet Printer. Plotter. Dot Matrix Printer
Lecture 10 Older Printing Devices Printing Devices Ink Jet Printers Laser Printers Thermal Printers Dye Sublimation Halftoning Dithering Error Diffusion Plotter Dot Matrix Printer pin motion ink covered
More informationMyth #1. Blue, cyan, green, yellow, red, and magenta are seen in the rainbow.
Myth #1 Blue, cyan, green, yellow, red, and magenta are seen in the rainbow. a. The spectrum does not include magenta; cyan is a mixture of blue and green light; yellow is a mixture of green and red light.
More informationTEACH THE CORRECT COLOR THEORY SCHOOL
Page 1 of 7 TEACH THE CORRECT COLOR THEORY IN SCHOOL Teachers in public schools are still teaching the wrong color theory to children. Here is a list of reasons why this is done, why it is wrong for teachers
More informationColor. Chapter 6. (colour) Digital Multimedia, 2nd edition
Color (colour) Chapter 6 Digital Multimedia, 2nd edition What is color? Color is how our eyes perceive different forms of energy. Energy moves in the form of waves. What is a wave? Think of a fat guy (Dr.
More informationColors in images. Color spaces, perception, mixing, printing, manipulating...
Colors in images Color spaces, perception, mixing, printing, manipulating... Tomáš Svoboda Czech Technical University, Faculty of Electrical Engineering Center for Machine Perception, Prague, Czech Republic
More informationChapter 4. Incorporating Color Techniques
Chapter 4 Incorporating Color Techniques Color Modes Photoshop displays and prints images using specific color modes A mode is the amount of color data that can be stored in a given file format 2 Color
More informationLecture 8. Color Image Processing
Lecture 8. Color Image Processing EL512 Image Processing Dr. Zhu Liu zliu@research.att.com Note: Part of the materials in the slides are from Gonzalez s Digital Image Processing and Onur s lecture slides
More informationColor April 16 th, 2015
Color April 16 th, 2015 Yong Jae Lee UC Davis Today Measuring color Spectral power distributions Color mixing Color matching experiments Color spaces Uniform color spaces Perception of color Human photoreceptors
More informationColor. April 16 th, Yong Jae Lee UC Davis
Color April 16 th, 2015 Yong Jae Lee UC Davis Measuring color Today Spectral power distributions Color mixing Color matching experiments Color spaces Uniform color spaces Perception of color Human photoreceptors
More informationColor Science. What light is. Measuring light. CS 4620 Lecture 15. Salient property is the spectral power distribution (SPD)
Color Science CS 4620 Lecture 15 1 2 What light is Measuring light Light is electromagnetic radiation Salient property is the spectral power distribution (SPD) [Lawrence Berkeley Lab / MicroWorlds] exists
More informationColor Theory. Chapter 2 Color Basics
Chapter 2 Color Basics Color Theory Intrinsic Value Primary/Secondary/Tertiary Strict vs. Chromatic Neutral, Tint, Shade, Tone Analogous/Adjacent Local vs. Atmospheric Clr Color & temperature Pigment vs.
More informationLECTURE 07 COLORS IN IMAGES & VIDEO
MULTIMEDIA TECHNOLOGIES LECTURE 07 COLORS IN IMAGES & VIDEO IMRAN IHSAN ASSISTANT PROFESSOR LIGHT AND SPECTRA Visible light is an electromagnetic wave in the 400nm 700 nm range. The eye is basically similar
More informationUnit 8: Color Image Processing
Unit 8: Color Image Processing Colour Fundamentals In 666 Sir Isaac Newton discovered that when a beam of sunlight passes through a glass prism, the emerging beam is split into a spectrum of colours The
More informationColor and Perception. CS535 Fall Daniel G. Aliaga Department of Computer Science Purdue University
Color and Perception CS535 Fall 2014 Daniel G. Aliaga Department of Computer Science Purdue University Elements of Color Perception 2 Elements of Color Physics: Illumination Electromagnetic spectra; approx.
More informationTwelve significant photographs in any one year is a good crop. - Ansel Adams. Color. Introduc)on to Digital Photography
Twelve significant photographs in any one year is a good crop. - Ansel Adams Color Introduc)on to Digital Photography Lecture outline How we see color Addi)ve (RGB) / Subtrac)ve (CMYK) HSB Hue Satura)on
More informationAchim J. Lilienthal Mobile Robotics and Olfaction Lab, AASS, Örebro University
Achim J. Lilienthal Mobile Robotics and Olfaction Lab, Room T1227, Mo, 11-12 o'clock AASS, Örebro University (please drop me an email in advance) achim.lilienthal@oru.se 1 2. General Introduction Schedule
More informationTo discuss. Color Science Color Models in image. Computer Graphics 2
Color To discuss Color Science Color Models in image Computer Graphics 2 Color Science Light & Spectra Light is an electromagnetic wave It s color is characterized by its wavelength Laser consists of single
More information10.2 Color and Vision
10.2 Color and Vision The energy of light explains how different colors are physically different. But it doesn't explain how we see colors. How does the human eye see color? The answer explains why computers
More informationPERCEIVING COLOR. Functions of Color Vision
PERCEIVING COLOR Functions of Color Vision Object identification Evolution : Identify fruits in trees Perceptual organization Add beauty to life Slide 2 Visible Light Spectrum Slide 3 Color is due to..
More informationUnderstanding Color Theory Excerpt from Fundamental Photoshop by Adele Droblas Greenberg and Seth Greenberg
Understanding Color Theory Excerpt from Fundamental Photoshop by Adele Droblas Greenberg and Seth Greenberg Color evokes a mood; it creates contrast and enhances the beauty in an image. It can make a dull
More informationFuture Electronics EZ-Color Seminar. Autumn Colour Technology
Polymer Optics Ltd. 6 Kiln Ride, Wokingham Berks, RG40 3JL, England Tel/Fax:+44 (0)1189 893341 www.polymer-optics.co.uk Future Electronics EZ-Color Seminar Autumn 2007 Colour Technology Mike Hanney Technical
More information