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Color Theory for Painting Video: Color Perception
Color Theory For Painting Video: Color Perception • http://www.ted.com/talks/lang/eng/beau_lotto_optical_illusions_show_how_we_see.html • Experiment • http://www.youtube.com/watch?v=y8U0YPHxiFQ Intro to color theory • http://www.youtube.com/watch?v=059-0wrJpAU&feature=relmfu Color Theory Principles • The Color Wheel • Color context • Color Schemes • Color Applications and Effects The Color Wheel The Color Wheel • A circular diagram displaying the spectrum of visible colors. The Color Wheel: Primary Colors • Primary Colors: Red, yellow and blue • In traditional color theory, primary colors can not be mixed or formed by any combination of other colors. • All other colors are derived from these 3 hues. The Color Wheel: Secondary Colors • Secondary Colors: Green, orange and purple • These are the colors formed by mixing the primary colors. The Color Wheel: Tertiary Colors • Tertiary Colors: Yellow- orange, red-orange, red-purple, blue-purple, blue-green & yellow-green • • These are the colors formed by mixing a primary and a secondary color. • Often have a two-word name, such as blue-green, red-violet, and yellow-orange. Color Context • How color behaves in relation to other colors and shapes is a complex area of color theory. Compare the contrast effects of different color backgrounds for the same red square. Color Context • Does your impression od the center square change based on the surround? Color Context Additive colors • Additive: Mixing colored Light Subtractive Colors • Subtractive Colors: Mixing colored pigments Color Schemes Color Schemes • Formulas for creating visual unity [often called color harmony] using colors on the color wheel Basic Schemes • Analogous • Complementary • Triadic • Split complement Analogous Color formula used to create color harmony through the selection of three related colors which are next to one another on the color wheel. -
Cielab Color Space
Gernot Hoffmann CIELab Color Space Contents . Introduction 2 2. Formulas 4 3. Primaries and Matrices 0 4. Gamut Restrictions and Tests 5. Inverse Gamma Correction 2 6. CIE L*=50 3 7. NTSC L*=50 4 8. sRGB L*=/0/.../90/99 5 9. AdobeRGB L*=0/.../90 26 0. ProPhotoRGB L*=0/.../90 35 . 3D Views 44 2. Linear and Standard Nonlinear CIELab 47 3. Human Gamut in CIELab 48 4. Low Chromaticity 49 5. sRGB L*=50 with RGB Numbers 50 6. PostScript Kernels 5 7. Mapping CIELab to xyY 56 8. Number of Different Colors 59 9. HLS-Hue for sRGB in CIELab 60 20. References 62 1.1 Introduction CIE XYZ is an absolute color space (not device dependent). Each visible color has non-negative coordinates X,Y,Z. CIE xyY, the horseshoe diagram as shown below, is a perspective projection of XYZ coordinates onto a plane xy. The luminance is missing. CIELab is a nonlinear transformation of XYZ into coordinates L*,a*,b*. The gamut for any RGB color system is a triangle in the CIE xyY chromaticity diagram, here shown for the CIE primaries, the NTSC primaries, the Rec.709 primaries (which are also valid for sRGB and therefore for many PC monitors) and the non-physical working space ProPhotoRGB. The white points are individually defined for the color spaces. The CIELab color space was intended for equal perceptual differences for equal chan- ges in the coordinates L*,a* and b*. Color differences deltaE are defined as Euclidian distances in CIELab. This document shows color charts in CIELab for several RGB color spaces. -
Pale Intrusions Into Blue: the Development of a Color Hannah Rose Mendoza
Florida State University Libraries Electronic Theses, Treatises and Dissertations The Graduate School 2004 Pale Intrusions into Blue: The Development of a Color Hannah Rose Mendoza Follow this and additional works at the FSU Digital Library. For more information, please contact [email protected] THE FLORIDA STATE UNIVERSITY SCHOOL OF VISUAL ARTS AND DANCE PALE INTRUSIONS INTO BLUE: THE DEVELOPMENT OF A COLOR By HANNAH ROSE MENDOZA A Thesis submitted to the Department of Interior Design in partial fulfillment of the requirements for the degree of Master of Fine Arts Degree Awarded: Fall Semester, 2004 The members of the Committee approve the thesis of Hannah Rose Mendoza defended on October 21, 2004. _________________________ Lisa Waxman Professor Directing Thesis _________________________ Peter Munton Committee Member _________________________ Ricardo Navarro Committee Member Approved: ______________________________________ Eric Wiedegreen, Chair, Department of Interior Design ______________________________________ Sally Mcrorie, Dean, School of Visual Arts & Dance The Office of Graduate Studies has verified and approved the above named committee members. ii To Pepe, te amo y gracias. iii ACKNOWLEDGMENTS I want to express my gratitude to Lisa Waxman for her unflagging enthusiasm and sharp attention to detail. I also wish to thank the other members of my committee, Peter Munton and Rick Navarro for taking the time to read my thesis and offer a very helpful critique. I want to acknowledge the support received from my Mom and Dad, whose faith in me helped me get through this. Finally, I want to thank my son Jack, who despite being born as my thesis was nearing completion, saw fit to spit up on the manuscript only once. -
Harlequin RIP OEM Manual
0RIPMate for Windows operating systems Harlequin PLUS Server RIP v9.0 June 2011 AG12325 Rev. 13 Copyright and Trademarks Harlequin PLUS Server RIP June 2011 Part number: HK‚9.0‚ÄìOEM‚ÄìWIN Document issue: 106 Copyright ¬© 2011 Global Graphics Software Ltd. All rights reserved. Certificate of Computer Registration of Computer Software. Registration No. 2006SR05517 No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, elec- tronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of Global Graphics Software Ltd. The information in this publication is provided for information only and is subject to change without notice. Global Graphics Software Ltd and its affiliates assume no responsibility or liability for any loss or damage that may arise from the use of any information in this publication. The software described in this book is furnished under license and may only be used or cop- ied in accordance with the terms of that license. Harlequin is a registered trademark of Global Graphics Software Ltd. The Global Graphics Software logo, the Harlequin at Heart Logo, Cortex, Harlequin RIP, Harlequin ColorPro, EasyTrap, FireWorks, FlatOut, Harlequin Color Management System (HCMS), Harlequin Color Production Solutions (HCPS), Harlequin Color Proofing (HCP), Harlequin Error Diffusion Screening Plugin 1-bit (HEDS1), Harlequin Error Diffusion Screening Plugin 2-bit (HEDS2), Harlequin Full Color System (HFCS), Harlequin ICC Profile Processor (HIPP), Harlequin Standard Color System (HSCS), Harlequin Chain Screening (HCS), Harlequin Display List Technology (HDLT), Harlequin Dispersed Screening (HDS), Harlequin Micro Screening (HMS), Harlequin Precision Screening (HPS), HQcrypt, Harlequin Screening Library (HSL), ProofReady, Scalable Open Architecture (SOAR), SetGold, SetGoldPro, TrapMaster, TrapWorks, TrapPro, TrapProLite, Harlequin RIP Eclipse Release and Harlequin RIP Genesis Release are all trademarks of Global Graphics Software Ltd. -
NEC Multisync® PA311D Wide Gamut Color Critical Display Designed for Photography and Video Production
NEC MultiSync® PA311D Wide gamut color critical display designed for photography and video production 1419058943 High resolution and incredible, predictable color accuracy. The 31” MultiSync PA311D is the ultimate desktop display for applications where precise color is essential. The innovative wide-gamut LED backlight provides 100% coverage of Adobe RGB color space and 98% coverage of DCI-P3, enabling more accurate colors to be displayed on screen. Utilizing a high performance IPS LCD panel and backed by a 4 year warranty with Advanced Exchange, the MultiSync PA311D delivers high quality, accurate images simply and beautifully. Impeccable Image Performance The wide-gamut LED LCD backlight combined with NEC’s exclusive SpectraView Engine deliver precise color in every environment. • True 4K resolution (4096 x 2160) offers a high pixel density • Up to 100% coverage of Adobe RGB color space and 98% coverage of DCI-P3 • 10-bit HDMI and DisplayPort inputs display up to 1.07 billion colors out of a palette of 4.3 trillion colors Ultimate Color Management The sophisticated SpectraView Engine provides extensive, intuitive control over color settings. • MultiProfiler software and on-screen controls provide access to thousands of color gamut, gamma, white point, brightness and contrast combinations • Internal 14-bit 3D lookup tables (LUTs) work with optional SpectraViewII color calibration solution for unparalleled color accuracy A Perfect Fit for Your Workspace A Better Workflow Future-proof connectivity, great ergonomics, and VESA mount Exclusive, -
Digital Refocusing with Incoherent Holography
Digital Refocusing with Incoherent Holography Oliver Cossairt Nathan Matsuda Northwestern University Northwestern University Evanston, IL Evanston, IL [email protected] [email protected] Mohit Gupta Columbia University New York, NY [email protected] Abstract ‘adding’ and ‘subtracting’ blur to the point spread functions (PSF) of different scene points, depending on their depth. In Light field cameras allow us to digitally refocus a pho- a conventional 2D image, while it is possible to add blur to tograph after the time of capture. However, recording a a scene point’s PSF, it is not possible to subtract or remove light field requires either a significant loss in spatial res- blur without introducing artifacts in the image. This is be- olution [10, 20, 9] or a large number of images to be cap- cause 2D imaging is an inherently lossy process; the angular tured [11]. In this paper, we propose incoherent hologra- information in the 4D light field is lost in a 2D image. Thus, phy for digital refocusing without loss of spatial resolution typically, if digital refocusing is desired, 4D light fields are from only 3 captured images. The main idea is to cap- captured. Unfortunately, light field cameras sacrifice spa- ture 2D coherent holograms of the scene instead of the 4D tial resolution in order to capture the angular information. light fields. The key properties of coherent light propagation The loss in resolution can be significant, up to 1-2 orders are that the coherent spread function (hologram of a single of magnitude. While there have been attempts to improve point source) encodes scene depths and has a broadband resolution by using compressive sensing techniques [14], spatial frequency response. -
Unbounded Color Engines
Unbounded Color Engines Marti Maria; Little CMS; Palamós; Catalonia, Spain Abstract the spec, ICC profiles are no longer limited to 8 or 16 bit, but to A Color Matching Method (CMM), also called a Color the broad range of 32-bit IEEE 754 floating point. That was a huge Engine, is a software component that does the color conversion improvement when regarding precision and dynamic range, which calculations from one device's color space to another. This paper is now only limited by floating point representation and can take as 39 discuses a new working mode for CMMs that allows such software much as 10 components to operate in a way that is not restricted by the gamut of the device encoding, the gamut of the profile connection space or any intermediate step. This allows ICC profiles to be used in new ways for a variety of applications. An open source CMM implementing this mode is also introduced. Background One of the main components of a color management system is the Color Matching Method, (CMM), which is the software engine in charge of controlling the color transformations that take place inside the system. By today, the vast majority of color management Figure 2. KODAK VISION2 500T Color Negative Film 5218 / 7218 systems do use International Color Consortium (ICC) profiles. This addendum, however, introduced another improvement ICC color management is based on device characterization perhaps not so evident but equally important. Floating point profiles. Color transformations can be obtained by linking those encoding has a huge domain, which is nearly infinite, much larger profiles. -
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. -
Thanks for Downloading the Sample Chapters
Thanks for Downloading the Sample Chapters Here are the chapters included. The Quick Start chapter, the first in the book, which identifies five quick ways to up the video and audio quality of your webinars and videoconferences. Chapter 5: Simple Lighting Techniques. The easiest way to significantly improve the quality of video produced by webcams and smartphones is to add lighting. You don’t have to spend a fortune; in fact, my go-to setup cost $30. You can read about this and more in this chapter. Chapter 9: Working With Audio on Android Devices. How to add and control a microphone on Android devices. Chapter 14: Working with Onstream Webinars. Audio and video adjustment controls available in Onstream Webinars. After the chapters, I’ve inserted the introduction to the book, and then the table of contents, so you can see what else is covered in the book. Thanks for having a look. Quick Start: Do This, Don’t Do That Figure a. Check your upload speed well in advance; don’t just pray for the best. This chapter contains highlights from various chapters in the book, both as a quick-start reference and as an introduction to the materials covered in the book. As you can see in Figure a, it’s better to check your outbound bandwidth with a tool called Speedtest than to simply pray that your bandwidth is sufficient. Chapter 1 has tables detailing the recommended bitrate for various conferencing and webinar applications, and other, related tips. Note that Speedtest is available as an app for both iOS and Android platforms, so you can check there as well. -
Switchable Primaries Using Shiftable Layers of Color Filter Arrays
Switchable Primaries Using Shiftable Layers of Color Filter Arrays Behzad Sajadi ∗ Kazuhiro Hiwadaz Atsuto Makix Ramesh Raskar{ Aditi Majumdery Toshiba Corporation Toshiba Research Europe Camera Culture Group University of California, Irvine Cambridge Laboratory MIT Media Lab RGB Camera Our Camera Ground Truth Our Camera CMY Camera RGB Camera 8.14 15.87 Dark Scene sRGB Image 17.57 21.49 ∆E Difference ∆E Bright Scene CMY Camera Our Camera (2.36, 9.26, 1.96) (8.12, 29.30, 4.93) (7.51, 22.78, 4.39) Figure 1: Left: The CMY mode of our camera provides a superior SNR over a RGB camera when capturing a dark scene (top) and the RGB mode provides superior SNR over CMY camera when capturing a lighted scene. To demonstrate this, each image is marked with its quantitative SNR on the top left. Right: The RGBCY mode of our camera provides better color fidelity than a RGB or CMY camera for colorful scene (top). The DE deviation in CIELAB space of each of these images from a ground truth (captured using SOC-730 hyperspectral camera) is encoded as grayscale images with error statistics (mean, maximum and standard deviation) provided at the bottom of each image. Note the close match between the image captured with our camera and the ground truth. Abstract ment of the primaries in the CFA) to provide an optimal solution. We present a camera with switchable primaries using shiftable lay- We investigate practical design options for shiftable layering of the ers of color filter arrays (CFAs). By layering a pair of CMY CFAs in CFAs. -
Primary Color | 23
BRAND Style GuiDe PriMary Color | 23 PRIMARY COLOR The primary color for Brandeis IBS is Brandeis IBS Blue, which is also the color of Brandeis University. Brandeis IBS Blue is BrandeiS iBS BLUE to be used as the prominent color in all communications. The PANTONE 294 C primary color is ideal for use in: CMYK 100 | 86 | 14 | 24 • Headlines • Large areas of text RGB 0 | 46 | 108 • Large background shapes HEX #002E6C Always use the designated color values for physical and digital Brandeis IBS communications. WEB HEX for use with white backgrounds #002E6C DO NOT use a tint of the primary color. Always use the primary color at 100% saturation. PANTONE color is used in physical applications whenever possible to reinforce the visual brand identity. CMYK designation is used for physical applications as an alternative to PANTONE (with the exception of any Microsoft Office documents, which use RGB). RGB values are used for any digital communications (excluding websites and e-communications), and all Microsoft Office documents (physical or digital). HEX values are used for any digital communications (excluding websites and e-communications). The value is an exact match to RGB. WEB HEX values are designated so websites and e-communica- tions can meet accessibility requirements. This compliance will ensure that people with disabilities can use Brandeis IBS online communications. For more about accessibility, visit http://www.brandeis.edu/acserv/disabilities/index.html. For examples of how the primary color should be applied across communications, please see pages 30-44. BRAND Style GuiDe SeCondary Color | 24 SeCondary Color The secondary color for Brandeis IBS is Brandeis IBS Teal, which is to be used strongly throughout Brandeis IBS com- BrandeiS iBS teal munications. -
White Paper the Twilight Zone
White paper The twilight zone …a journey through the magic realm of color spaces, gray shades, color temperatures, just noticeable differences and more Goran Stojmenovik Product Manager Barco Control Rooms division The whole story behind display specifications and human vision (2) Abstract Our world and the displays representing it are not black and white, as someone might think when seeing a display spec consisting only of luminance and contrast. There is much more, there is a whole world of gray shades, color spaces, color temperatures, contrast sensitivities, just noticeable differences. Knowing what “brightness” and “luminance” are and being able to distinguish them, knowing what influences on-screen contrast of a display, and knowing how the eye adapts to changes in luminance levels – these are factors you should have learned from the first part of this white paper. Here, we will go into deeper waters of human vision, to explain when we perceive a display as a good display, and what are the requirements posed by the human visual system to create a good display. Page 1 of 9 www.barco.com White paper The twilight zone Display requirements and human vision Gamma When we talk about brightness and contrast, we cannot THE GAMMA DETERMINES THE skip the famous “gamma.” For one specified contrast, BRIGHTNESS OF THE MID-GRAY we know it’s the brightest white and darkest black that SHADES matter. But, what about all the in-between? This is the region of the gray shades. They are produced by tilting the liquid crystal molecules with a voltage (in LCD displays), or by modulating the amount of time a certain DMD mirror is on during one frame (in DLP projection displays).