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color management

for shanghai normal university

howard kim

on 26 October 2015

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Transcript of color management

What is Color Management?
The ability to reproduce consistent, predictable and
repeatable color across an entire range of devices
Image you see with your camera reproduce accurately on your displays and projectors
The image on your display will print accurately
Each device produces colors differently; from camera, to display or projector, to print
A color management system can solve most color inconsistencies by acting as a color interpreter (or icc profile)
With the proper color management in place, your colors will display & output more accurately
Fundamentals of Color
Human Vision
Human eye uses RGB color model
1 in 12 men are color deficient
1 in 250 women are color deficient
Color Deficiencies
Most commonly it’s particular shades of reds and greens
Most workflows go from large gamut input devices to smaller gamut output devices
Input Device
larger color gamut camera RGB
Working Space
working RGB
Output Device
smaller color gamut print RGB
Standardized Color
Color Management uses standardized International Color Consortium (ICC) profiles
ICC profiles contain information about the color characteristics of devices, such as digital cameras, monitors and printers
Profiles can be read by ICC aware applications like Photoshop and Lightroom
Needs an ICC Profile
Needs an ICC Profile for each paper & ink combination
ICC Aware Applications
Color Spaces
a standard RGB (Red/Green/Blue) color space created by HP & Microsoft for use on monitors, printers, and the internet
Adobe RGB
developed by Adobe in 1998. It was designed to encompass most of the colors on CMYK color printers by using RGB primary colors on a device such as the computer display
Solutions to Manage Devices
RAW Calibration with SpyderCube ensures the proper light and color balance in your image
Display Calibration with Spyder3Elite to accurately produce colors on screen
Printer profiling with Spyder3Print SR for gallery quality prints
RAW Calibration with references ensures the proper light and color balance in your image
Capture accurate color without a lot of trial and error manipulation
Spectrally Neutral, so that Cube responds accurately to all lighting conditions
Provides reference values to check and adjust RAW control settings
How it works
Use the SpyderCube in the 1st shot in a series of images with the same lighting condition
Take a photograph that includes the Cube. This photo will capture important information about the shooting conditions, to be used in making basic RAW adjustments
before adjustments
after adjustments
All display colors drift over time so recalibration is necessary (we suggest every 2-4 weeks)
The Wizard asks you to choose your display type
Choose your displays settings and targets
How it works
Place the Spyder3Elite device on the screen using the counterweight or the suction cup
The software will run through a series of RGB color patches
Printer profiling for gallery quality prints
Print images accurately the first time, saving time and money
Designed specifically for the way photographers work
How it works - Printer Profiling
Print the target that suits your needs on the media you’d like to profile
After you let the target dry you click and drag across the row to read the color patches
Create a custom ICC profile
How it works - Soft proofing in Photoshop
This allows you to simulate what the image will look like on your printed paper
using your new profile
In the Print Dialog box choose your new printer profile and the same media type you used to make the profile
Color Managed Workflow
Proper color management gives you consistent color throughout your digital workflow
Improve image quality from shoot to print
Save time, ink and paper (and the environment)
Get prints that match your
Easy to use for the beginner& flexibility for professionals
Color Management
what is it and why do I need it?

Prof. Howard Kim
Chief, Color Technology Laboratory
Professor, Yong-In Songdam College, Dept of Colorist
Consultant, National Technical Certification Policy Board, MOLAB
Chief Instructor for Datacolor Color Management Course, Seoul
A member of Society for Imaging Science and Technology (IS&T)
Certified Display Technical Specialist for Hewlett-Packard
Technical Advisor for LG Electronics, Display Engineering
Digital Imaging Techday Seoul, Director
General Manager/Executive, Colorime Concept Group
Twitter: @howardkm
Email: howard@ysc.ac.kr
Blog: colormgmt.com
Image Calibration
Monitor Calibration
Printer Profiling
Color Viewing Condition
Color Object (display, print..) should be brighter than ambient.
Displays - What's the problem?
No 2 displays are alike; they all look different
Color Management in the Operating System
always-on color management :
mac osx 10.3~
partial color management :
mac osx ~10.2 and MS windows
Color-managed application
Adobe softwares
Corel softwares
Canon, Nikon, Epson softwares
Firefox, Safari web-browsers

Non color-managed application
MS Internet explorer
MS Windows photo viewer
MS Windows user interface
Color Image =
Red 8 bit 256 color
Green 8 bit 256 color
Blue 8 bit 256 color

256 x 256 x 256 = 16,777,216
= 8bit color image
TN Panel represent
Red 6 bit 64 color
Green 6 bit 64 color
Blue 6 bit 64 color
64 x 64 x 64 = 262,144
= 6bit color image
display uniformity is also important
Digital Workflow
Founding Members:Adobe, Agfa, Apple, Kodak, Microsoft
International de-facto standards.
ISO 15076-1:2005
D50 Standard Light is required to view print correctly
Monitor Color Gamut
ICC Profile assign windows on OS
inside the profile
Color applet in Windows XP
Rendering Intent for gamut mismatch
Teaching Subjects in college
Digital Imaging
Digital Photography
Digital Color Management for the photography
Digial Color Processing
Color Managemant System
It reads image profiles, but not monitor profiles.
Color management is a corner-stone for the photographers
whitepoint: 6500k
gamma: 2.2
even though world is not calibrated, calibration works!
be sure!
profile: your weight
calibration: calibrating the scale
Photoshop's color setting
Multiple Monitor Calibration
Luminance (brightness)
exposure to
90% or 230
blacks or shadows to
4% or 10
Full transcript