1. Color Management Matters Why Color Management matters to Open Source and to You

2. Color Management Basics Primary goal Simple (but not necessarily easy) Match output from different devices Perception Only for certain professionals Only esoteric experts care Many who could benefit are missing out

3. Color Management Basics People need it but don't realize they do Businessmen Home users Any company selling product over the 'net Current state Main OS vendors have long running solutions Linux has been seriously lagging Even how things relate to X11 complicates matters

4. Color Management Basics Most Basic “Eyeball it” Ad Hoc White balance Black & White reference Color reference Measured Calibration targets Calibration hardware

5. Color Management Basics Do You need Color Management? Multiple displays Photo prints Purchasing online Sharing images Probably yes If you have eyes & a computer If you are contributing to OSS Coding, creating assets, publicizing, etc.

6. Color Management Basics Multiple Displays?

7. Color Management Basics Multiple Displays Multi-monitor...

8. Color Management Basics Multiple Displays Multi-monitor Second computer Cell phone/PDA TV MP3 player Digital picture frame Projector Toaster, etc.

9. Color Management Basics Good news Quality devices more affordable and common End user expectations increasing Collaboration across many Open Source projects Developer momentum Picking up significantly around the time of LGM More projects adding at least some Color Management

10. ICC Profiles Main focus of current Open Source CMS Different types needed Monitor/display Scanner Printer Target Knowing ICC profiles are pivotal is the key

11. Multi-monitor Very tricky Different supporting technologies Vendor specific Xinerama XrandR Multiple steps Profile Adjust Fetch

12. CMYK Considerations CMYK Support There is no single CMYK color space Need for CMYK indicates need for CM Applications RGB is simple Poor CMYK is almost simple Good CMYK requires CM and workflow

13. Color Management in OSS History and Overview

14. Application Sampling Cinepaint Scribus Krita SK1 GIMP Inkscape Others...

15. Tools Common tools for creating, applying and maintaining ICC profiles Argyll Color Management System http://www.argyllcms.com/ Oyranos http://www.oyranos.org/ LPROF http://lprof.sourceforge.net/ XICC http://burtonini.com/blog/computers/xicc

16. Tools Library to add ICC profile support Little CMS http://www.littlecms.com/ Small Simple API Handles all the tricky maths Easy to integrate

17. Scribus Professional PDF/print workflow Some drawbacks for SVG Needs to support more SVG features Good news Support planned for v 1.3.6 Info http://docs.scribus.net/index.php?page=cms http://www.gimp.org/release-notes/gimp-2.4-cm.html

18. GIMP 2.4 Recent introduction Fall 2007 http://www.gimp.org/release-notes/gimp-2.4-cm.html Full base features Sets RGB and CMKY working profiles Display profile Soft-proofing profile Mixing image colorspaces is tricky

19. Inkscape 0.46 Feature Overview Implicit working colorspace defined as sRGB for linking profiles since 0.44 Features new for 0.46 Display Adjustment Soft-proofing CMS-based color selection

20. For Web Graphics Most end users do not have corrected displays PC vs. Mac too light/too dark problem sRGB is the “close enough” web colorspace “Web” workflow Work targeting sRGB Preview with “Mac” profile(s) Preview with “PC” profile(s) Preview with mobile profiles

21. Inkscape for Print Graphics Most in need of color managed workflow Desired colors marked with an ICC profile A CMYK profile (there is no single CMYK) Corrective RGB profile Profile listing spot colors (but not named colors) Multiple color profiles can live in a single SVG Proofing profile very useful

22. Inkscape for Mobile Devices Good but possibly overlooked use for CMS No explicit SVG file profile needed (sRGB) Multiple proofing profiles LCD and display differences including bit-depth Backlight on/off Sunlight/artificial light/darkness Viewing angle etc.

23. Cross Application Integration Status As many applications as possible should be managed Many more now support CMS than in 2005 OpenICC is helping What next? Developers add support to more applications Users ask for support in more applications

24. Bad Web Workflow 1.Picture taken of object 2.Picture imported to computer 3.Colors changed to match original 4.Image published on website Editing computer not correct

25. Good Web Workflow 1.Picture taken of object 2.Picture imported to computer 3.Colors changed to match original 4.Image published on website

26. Bad Web User 1.Picture taken of object 2.Picture imported to computer 3.Colors changed to match original 4.Image published on website Viewing computer wrong

27. Bad Print Workflow 1.Picture taken of object 2.Picture imported to computer 3.Colors changed to match original 4.Image sent out to printers (same make) One printout looks wrong, other accidentally right

28. Less Bad Print Workflow 1.Picture taken of object 2.Picture imported to computer 3.Colors changed to match original 4.Image sent out to printers (same make) One printer right, other looks wrong

29. Good Print Workflow 1.Picture taken of object 2.Picture imported to computer 3.Colors changed to match original 4.Image sent out to printers (same make) Correct since printer- specific output profiles used

30. Sample ICC Profiles

31. Laptop vs External LCD Laptop LCD vs External LCD External shows more

32. Laptop vs HDMI TV Laptop LCD vs HDMI TV TV shows much more

33. Laptop vs sRGB Laptop LCD vs sRGB sRGB goes more than Laptop LCD. Laptop can't do full theoretical “web” colors

34. Laptop vs CMYK Laptop LCD vs. “Generic” CMYK Colors range differently Very disjoint colors

35. CMYK vs Printer “Generic CMYK vs. specific Printer The “Generic” CMYK falls short of capabilities of actual printer Printer model is common “home office” printer.

36. Color Management Matters Questions?

37. Color Management Matters Thanks linux conf au http://linux.conf.au/ Open Clipart Library http://www.openclipart.org/