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El. knyga: Color Gamut Mapping

(Hewlett-Packard Company)
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Gamut mapping algorithms, implemented by color management systems, are an integral part of the color reproduction process. By adjusting the colors with appropriate algorithms, gamut mapping enables original colors to ‘fit’ inside differently shaped color gamuts and authentically transfers images across a range of media.  

This book illustrates the range of possible gamut mapping strategies for cross-media color reproduction, evaluates the performance of various options and advises on designing new, improved solutions. Starting with overviews of color science, reproduction and management, the text includes: 

  • a detailed survey of 90+ gamut mapping algorithms covering color-by-color reduction and expansion, spatial reduction, spectral reduction and gamut mapping for niche applications;
  • a step-by-step example of a color’s journey from original to reproduction, via a digital workflow;
  • a detailed analysis of color gamut computation, including a comparison of alternative techniques and an illustration of the gamuts of salient color sets and media;
  • a presentation of both measurement-based and psychovisual evaluation of individual color reproductions;
  • an overview of alternative approaches to gamut mapping proposed by the ISO and the CIE including an analysis of the building blocks of gamut mapping algorithms and the factors affecting their performance.

Color Gamut Mapping is a comprehensive resource for practicing color and imaging engineers, scientists and researchers working in the development of imaging devices, software and solutions.  It is also a valuable reference for students of color and imaging science, as well as photographers, graphic designers and artists.

Recenzijos

Jan Morovic does a good job of describing the many aspects of color. The first four chapters are expansive. They present summaries of the definition of color, basic color science, categories of possible color reproduction goals, and color mapping goals. (COLOR research and application, June 2009)

Foreword ix
Series Preface xi
Preface xiii
Introduction
1(10)
What is Color Gamut Mapping?
1(4)
Historical Context of Gamut Mapping
5(2)
Who is this Book for?
7(1)
What is in the Rest of the Book?
8(3)
Basics of Color Science
11(34)
What is Color?
11(1)
Describing Color Experiences
12(4)
The Color Ecosystem
16(1)
The Human Visual System
17(4)
Physical Color-related Properties
21(4)
Colorimetry
25(4)
Color Ecosystem Interactions
29(6)
Digital Color Capture and Generation
35(4)
Color Management
39(2)
What can Affect the Appearance of a Pair of Stimuli?
41(1)
Summary
42(3)
Desired Color Reproduction Properties and their Evaluation
45(28)
Color Reproduction Framework
45(2)
Desired Color Reproduction Properties
47(6)
Evaluating Reproductions
53(17)
Case Study: Evaluating Printed Reproductions of a Displayed Image
70(1)
Summary
71(2)
Color Reproduction Data Flows
73(18)
Device Color Spaces
73(3)
Conceptual Stages of Color Reproduction
76(5)
Closed-loop Color Management
81(2)
sRGB Color Management
83(2)
ICC Color Management
85(3)
Windows Color system Color Management
88(1)
Importance of Gamut Mapping in Color Reproduction
89(1)
Summary
90(1)
Overview of Gamut Mapping
91(20)
Definitions
91(3)
Aims of Gamut Mapping
94(1)
Gamut Mapping Algorithm Context
95(1)
Types of Gamut Mapping
96(1)
Building Blocks of Gamut Mapping Algorithms
97(8)
Factors Affecting Gamut Mapping
105(2)
Will Gamut Mapping become Redundant?
107(4)
Color Spaces for Gamut Mapping
111(12)
Implications of Mapping Appearance Predictors
112(2)
Which Appearance Attributes' Predictors to Map
114(1)
Overview of Color Appearance Spaces
115(4)
Mapping in Nonappearance Spaces
119(2)
Choosing a Space for Gamut Mapping
121(2)
Basic Computational Geometry for Gamut Mapping
123(10)
Spaces, Points, Lines and Planes
123(3)
Intersections
126(2)
Is a Point Inside or Not?
128(1)
Normals
129(2)
Triangulation
131(1)
Summary
132(1)
Color Gamuts and their Computation
133(38)
Challenges and Implications of Definition
134(9)
Gamut Boundary Descriptor Algorithms
143(12)
Evaluating and Operating on Gamut Boundary Descriptions
155(5)
Examples of Salient Color Gamuts
160(7)
Image Gamuts
167(2)
Summary
169(2)
A Case Study: Minimum Color Difference Gamut Clipping
171(22)
The Original
171(4)
The Destination Gamut
175(1)
Minimum Color Differnce Gamut Mapping
176(6)
The Destination Image
182(1)
Effect of Alternatives
183(8)
Summary
191(2)
Survey of Gamut Mapping Algorithms
193(48)
Color-by-color Reduction
194(26)
Color-by-color Expansion
220(4)
Spatial Gamut Reduction
224(10)
Spectral Gamut Mapping
234(3)
Gamut Mapping for Special Applications
237(2)
Summary
239(2)
Gamut Mapping Algorithms and Color Management Systems
241(6)
Gamut Mapping Algorithms for Closed-loop Color Management
241(1)
Gamut Mapping Algorithms for sRGB Color Management
242(1)
Gamut Mapping Algorithms for ICC Color Management
242(2)
Gamut Mapping Algorithms for WCS Color Management
244(1)
Types of Color Management Context
245(1)
Spatial and Spectral Gamut Mapping
246(1)
Conclusions
246(1)
Evaluating Gamut Mapping Algorithms
247(14)
Why is there no Reference Data Set in Gamut Mapping Algorithm Evaluation?
248(2)
Characteristics of Published Gamut Mapping Algorithm Evaluation
250(2)
What can be Said on the Basis of Existing Evaluation Results?
252(1)
CIE Guidelines
253(2)
Studying Specific Properties of Gamut Mapping Algorithms
255(3)
Summary
258(3)
Conclusions
261(4)
References 265(16)
Index 281
Dr Jįn Morovi , Hewlett-Packard Espanola, S. L, Avda. Grealls, Barcelona, Spain Jįn Morovi is currently a Senior Color Scientist at Hewlett-Packard Espanola, Barcelona, Spain. He is highly regarded in the field of colour science, being Chair of the CIE (International Commission on Illumination) technical committee 8-03 on gamut mapping, a post he has held since 1998. Before his appointment in industry for Hewlett-Packard, Dr Morovi has also had academic experience at the University of Derby, UK. He has delivered lectures to an international audience, both academic and industrial, led industrially funded projects, and developed new commercial technologies. In addition, he has authored 62 academic publications, including book chapters, journal, and conference papers on colour gamut mapping, and also helped to create a CIE technical report detailing guidelines for the Evaluation of Mapping Algorithms.
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