Windows Color System Overview

Lavanya VasudevanProgram ManagerDigital Documents Platform and Solutions LavanyaV @ microsoft.comMicrosoft Corporation

Michael StokesColor ArchitectDigital Documents Platform and Solutions MiStokes @ microsoft.comMicrosoft Corporation

Session OutlineSession Outline

Windows Color System (WCS) MotivationColor scenarios in Windows codenamed “Longhorn”

Formalized framework

User goals System behavior System design

Windows Color System in LonghornColor Infrastructure and Translation Engine (CITE)

Infrastructure

Baseline Models

Plug-In Infrastructure

ICM2 Improvements

User Experience Enhancements

Color in the Print Pipeline

Session GoalsSession Goals

Attendees should leave this session with an understanding of:

Design principles of Windows Color System

Design details of the Windows Color System

How to take best advantage of enhanced capabilities and opportunities for innovation

Where to find more information

How best to provide feedback

Longhorn Color ScenariosLonghorn Color Scenarios

WCS Use Case: End to End WorkflowWCS Use Case: End to End Workflow

Goal: Accomplish End-to-End Color Workflow in Longhorn

Primary Actor: PC-user

Main Success Scenario:1. PC-user connects all color-devices to the Longhorn-PC.

2. PC-user acquires color-document from color-input-device.

3. PC-user opens the color-document within a color-managed-application.

4. PC-user views the color-document within the color-managed-application in full screen mode on the display-device.

5. PC-user validates color-quality of displayed color-document.

6. PC-user prints the color-document from the color-managed-application to a local Metro-print-device.

7. PC-user validates color-quality of printed color-document.

WCS Use Case: WYSIWYGWCS Use Case: WYSIWYG

Goal: Validate Color Quality

Primary Actor: PC-user

Preconditions:PC-user is viewing the color-document within a color-managed-application in full screen mode on a display-device connected to a Longhorn-PC.

PC-user has printed the color-document from the color-managed-application to a local Metro-print-device.

Main Success Scenario:1. PC-user compares the color-appearance of the color-document on

the display-device, and the printed version of the color-document from the local Metro-print-device.

2. PC-user validates that the color-appearances match.

WCS PipelineWCS Pipeline

GamutMap Model

DeviceModel

ColorAppearance

Model

ColorAppearance

Model

DeviceModel

Gamut MapModel Profile

Device Color Space

Device-IndependentColor Space

CIEXYZ

Color

Appearance

Space

CIEJch

Device Model Profiles A, B

Color Appearance Model Profiles A, B

Baseline Device ModelsBaseline Device Models

Objective intra-device measurements

Baseline set for common devices built in

Plug-in device models:Enhanced models for baseline devices

Specialized models for new or high-end devices

Pixel Values in

Device Color Space

Device ModelAlgorithms

Pixel Values in

CIEXYZ

Device Model Profile (DMP)

Measurements,

Parameters

Color Appearance ModelColor Appearance Model

State-of-the-art Color Appearance Model built into platform

Enables better handling of different viewing conditions

CIECAM02Algorithms

Pixel Values in

CIEXYZ

Pixel Values in

CIEJch

Color Appearance Model Profile (CAMP)

Viewing Condition Parameters

Gamut Mapping ModelGamut Mapping Model

Subjective inter-device transforms

Perceptually uniform

Baseline set (≈ ICC rendering intents) built in

Plug-in gamut mapping models:

Proprietary algorithms

Improvements on baseline models

Gamut Map ModelAlgorithms

Source Color

Pixel Value in CIEJCh

Destination Color

Pixel Value in CIEJch

Source Gamut Boundary

Destination Gamut Boundary

Rendering Intent or GMM from Gamut Map Model Profile (GMMP)

Support FunctionsSupport Functions

Gamut Boundary Descriptors and Gamut Shells

Pixel Formatter

Samples in Device Color Space

Device ModelColor

Appearance Model

Derive Convex

Hull

Ordered Vertex List= Gamut Boundary Descriptor

PixelsRaster or Vector Format

Integers, Fixed Point, FloatPixel Formatter

PixelsCITE Internal Pixel Format

32 bpc Float Normalized [0.0, 1.0]

Transform Execution

Color Infrastructure and Translation Color Infrastructure and Translation EngineEngine Pixel Values in

Source Color Space

Source DM

Source CAM

GMM

Dest CAM-1

Dest DM-1

Pixel Values in Dest Color Space

Gamut BoundaryFunctions

Buffer of Samples in Source Color Space

Internal Sequential Transform

Buffer of Samples in Dest Color Space

Source Colors

Pixel Formatter

Transform Cache

Interpolate inOptimized Transform

Look Up Table

Pixel Formatter

Destination Colors

Sequential Transform Optimized Transform Transform Execution

New WCS APIsNew WCS APIs

Work with new profile formats

Enhanced functionality

ICM2 ImprovementsICM2 Improvements

Key bugs fixed

Subset of current ICM2 APIs extendedWork with new profiles

Access CITE

Continued ICC SupportContinued ICC Support

Improved v2 support

Added v4 support

Color Control Panel PrototypeColor Control Panel Prototype

New Print InfrastructureNew Print Infrastructure

“Metro” is the conduit for color Planned support for scRGB, named color, CMYK, n-channel

Metro Print Path

PrintTicket/PrintCapabilities

Windows Color System RoadmapWindows Color System RoadmapA Staged Approach

New color management infrastructure and developer platform

Vehicle for vendor innovation

Foundation for long-term investment

XP Planned for Longhorn

CITE CAM, DMs, GMMs, Plug-ins

ICC Support ICM2 Bug FixesV4 Support, ICM2 Bug Fixes, WinFX

ProfileManagement

WCS APIs, ICM2 Bug Fixes

UICentral Control Panel

Central Control Panel with WCS Support

Calibration Wizard

Display

Device controlDisplay (DDC/CI, VideoDAC), Print (PT/PC)

Call to ActionCall to Action

Understand the Windows Color System

Read WCS use cases  

Submit your own scenarios

Send us feedback at mscolor@ microsoft.com

Review the Metro v.7 specification and provide feedback to prninfo@microsoft.com

http://www.microsoft.com/whdc/device/print/metro.mspx

Start implementation with Beta 1!

Visit the WinHEC Hardware Showcase and vendor booths in the exhibition!

Additional ResourcesAdditional ResourcesCommunity Sites

http://www.microsoft.com/communities/default.mspx

List of Newsgroupshttp://communities2.microsoft.com/communities/newsgroups/en-us/default.aspx

Attend a free chat or webcasthttp://www.microsoft.com/communities/chats/default.mspx http://www.microsoft.com/seminar/events/webcasts/default.mspx

Locate a local user group(s)http://www.microsoft.com/communities/usergroups/default.mspx

Non-Microsoft Community Siteshttp://www.microsoft.com/communities/related/default.mspx

MSDN Developer Community Chats:Printer Drivers -- Ask the Experts Online

http://msdn.microsoft.com/chats/windows/windows_102402.aspWindows Drivers: Printer Drivers

http://msdn.microsoft.com/chats/windows/windows_101602.aspWindows Drivers Printing and Networking

http://msdn.microsoft.com/chats/windows/windows_022002.asp

Additional ResourcesAdditional ResourcesWeb resources

WS-Devices Profile:

http://msdn.microsoft.com/webservices/understanding/specs/default.aspx?pull=/library/en-us/dnglobspec/html/devprof.asp Printer Working Grouphttp://www.pwg.org WHDC Printing home page: http://www.microsoft.com/whdc/device/print/default.mspxWHDC Still Imaging / WIA home page: http://www.microsoft.com/whdc/device/stillimage/default.mspxWHDC Color home page:http://www.microsoft.com/whdc/device/display/color/default.mspx Color Use Caseshttp://www.microsoft.com/whdc/device/display/color/WCS_cases.mspx

“Writing Effective Use Cases”, Alistair Cockburn, ISBN 0201702258

E-mailFor developer print questions: prninfo @ microsoft.comFor developer scan questions: wiainfo @ microsoft.com For developer color questions: mscolor @ microsoft.com

Whitepaper On WinHEC CD “The Windows Color System in Longhorn”

Related Sessions: WinHEC 2005Related Sessions: WinHEC 2005

April 25:Advances in Windows Printing

Foundation Technologies for the Document Life Cycle

Ask the Experts:Windows Color

Windows Printing

Windows Document Technology

Avalon

April 27:Avalon Imaging Codec Architecture: Overview

New Document Life Cycle Opportunities

What’s in a Use Case?What’s in a Use Case?

Usage narrative or storyWarm up with a “day in the life”

Actors and goalsWhat are the system’s service promises?

Main Success ScenarioTop-to-bottom, typical scenario, goal delivery

Extensions“Well, there’s a little complication…”

Extension handlingHow should the system respond?

Use CasesUse CasesContracts About System Behavior Contracts About System Behavior

Why do we care?Helps us:

Discover behavioral requirements

Link user goals, UI design, performance requirements, data formats, business rules…

Structure project planning and priorities

Describe the purpose, behavior, status and results

Helps you:Evaluate system behavior

Communicate new requirements

System Under Design

Stakeholders

PrimaryActor Request

Response

Interests

Goals