28. Digital Color

Full Day / Intermediate

Computers have been used to generate synthetic images since the first SIGGRAPH conference, and to generate color images for nearly that long. But only recently has it become practical to create and reproduce digital images with predictable, accurate color, and easily move images from the SIGGRAPH world into video, film, and print. This course explains the science behind color reproduction, image digitization, and image reproduction in video, film, print, and computer graphics.

Who Should Attend
Hardware and software engineers, system designers, digital cinematographers, and advanced end users, including digital photographers.

Charles Poynton
Poynton Vector Corporation

Thor Olson
Management Graphics

Michael Bourgoin
Adobe Systems, Inc.

Jan De Clippeleer


8:30 am: Lightness Perception - Poynton

Contrast sensitivity; lightness perception, CIE L*; nonlinear coding

9:15 am: Color Perception - Poynton

Spectrum to color components; CIE XYZ, RGB tristimulus; CIE x, y chromaticity; Gamut constraints; CIE L*u*v* and L*a*b*

10:00 am: Break

10:15 am: Video and Computer Graphics - Poynton

Gamma Correction; RGB, R'G'B', Y'CBCR, Y'UV, Y'IQ, Y'CC; Implicit viewing assumptions

11:00 am: Film - Olson

Film tone response; Emulsion sensitivity; Dye absorption; PhotoYCC; logarithmic coding; SMPTE DPX

12:00 noon: Break

1:30 pm: Print - Bourgoin

Dithering, halftoning, dot gain; CMY, CMYK, UCR, CGR; PSL2

2:15 pm: Color Management Systems - de Clippeleer

Color Transforms; CMS architecture; Device profiles, ICC; Characterization and Calibration of Monitors, Scanners and Printers

3:00 pm: Break

3:15 pm: Human Interface - Poynton

Visual acuity, viewing angles; Color discrimination; HLS, HSB, HVC; Color order systems

4:15 pm: Q&A

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