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Color Gamut Mapping for 3D Printing

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Color Gamut Mapping for 3D Printing ICC Display & 3D Print Meeting MAY 06 2016 Color Gamut Mapping for 3D Printing Speaker: Yuan-Peng Pi (皮遠韸) Advisor: Pei-Li Sun (孫沛立) Graduate Institute of Color and Illumination Technology National Taiwan University of Science and Technology 1 Personal Detail Yuan-Peng, Pi EMAIL : [email protected] EDUCATION B.S. in Electronic and computer engineering, NTUST 2010-2014 Master in Color & Illuminance technology, NTUST 2014- 2016 RESEARCH INTEREST Color imaging processing Cross-media color management system RESEARCH PROJECT Color gamut mapping for full color 3D printing Color reproduction from textile and tile System implementation and development of a photo curable Color 3D Additive Manufacturing Technique 2 PROJET® 460PLUS PROFESSIONAL 3D PRINTER Build envelope capacity 8 x 10 x 8 in (203 x 254 x 203 mm) (W x D x H) Color White (monochrome)CMY Resolution 300 x 450 DPI Build material VisiJet PXL Layer thickness 0.004 in (0.1 mm) Min. feature size 0.03 in (0.8 mm) Max. vertical build speed 0.9 in/hour (23 mm/hour) Number of print heads 2 Draft printing mode No (monochrome) Number of jets 604 Material recycling Yes Automatic build platform Yes NO COLOR MANAGEMENT cleaning Integrated part cleaning Integrated 3 Display Printed PROJET® 460PLUS 3D PRINTER 4 Find the Gamut Psychophysical Printer’s Mapping Experiment Gamut 5 Finding the Gamut Testchart TC-2.83 Image Printed Gamut : range of realisable colors 6 Printer’s Gamut Find the Gamut Mapping Psychophysical Printer’s Gamut Experiment PROJET® 460PLUS sRGB 7 Model 8 Device Dependent Color Transformations 9 Device Independent Color Transformations PCS Profile Connection Space 10 ICC Profile ICC profile is a set of data that characterizes a color input or output device, or a color space. characterizes a color characterizes a color input device PCS output device CIELAB or CIEXYZ 11 Printer with CMS Input model 3D Printer PCS Source Destination profile profile 12 PROJET® 460PLUS 3D PRINTER No CMS Do the adjustment on the 3D model’s texture 13 Texture We are going to do PCS RGB to LAB LAB to RGB map 3D Printer 14 We are Going to Do Make the LUT for from PCS to RGB After printed The color sent to the printer from PC L* = 60 R = ? a* = 70 G = ? b* = 60 B = ? Gamut Mapping 15 We are Going to Do Make the LUT for from PCS to RGB Gamut Mapping Clipping Hue-angle Preserving Minimum ∆Eab Clipping (HPminDE) Chroma Dependent Sigmoidal Lightness Mapping and Cusp Knee Scaling (SGCK) 16 Find the Gamut Psychophysical Printer’s Mapping Experiment Gamut 17 Color Management Method Clipping Find the minimum distence inside the printer’s gamut 18 Color Management Method HPminDE STEP 1 STEP 2 Find the hue angle Find the minimum distence inside the printer’s gamut 19 Color Management Method SGCK Step 1 Step 2 Lightness Mapping Adjustment 20 Color Management Method SGCK -Lightness Adjustment Output 21 Input Color Management Method SGCK -Lightness Adjustment White Line Before Adjustment sRGB After Adjustment sRGB Project 460 Plus L* Green Line C* 22 Color Management Method SGCK -Lightness Adjustment White Line 30° Before Adjustment sRGB After Adjustment sRGB Project 460 Plus L* optimization Green Line C * 23 Color Management Method SGCK -Color Mapping 90% of the Printer’s Gamut Inside : Hold Still 푔푟 Outside : Do the Mapping 푂 푔표 24 Color Management Method SGCK -Color Mapping Many colors look the same after mapping 푂1 푂 2 푂3 25 Color Management Method SGCK -Color Mapping 50% of the Printer’s Gamut Inside : Hold Still 푔푟 Outside : Do the Mapping 푂 푔표 26 Result Initial texture Clipping HPminDE SGCK 27 Result Initial texture Clipping HPminDE SGCK 28 Find the Gamut Psychophysical Printer’s Mapping Experiment Gamut 29 Psychophysical Experiment Monitor : EIZO ColorEdge SG232W set to sRGB 12 observers Ambient light condition was set in the dark room Color Viewing Light Booth - D65 30 Psychophysical Experiment - Pair Comparison Method No CMS Clipping HPminDE SGCK 31 For 4 model 2.50 2.50 2.00 2.00 1.50 1.50 1.00 1.00 0.50 0.50 s s e e u u l l 0.00 0.00 a a v v e e l l a a -0.50 -0.50Result c c s s -1.00 -1.00 -1.50 -1.50 -2.00 -2.00 -2.50 -2.50 -3.00 -3.00 min DE HP min DE) SGCK minm DinE D+UESM HPH mP imn iDn ED+EU)SM SGSCGKC+UKSM minN Do EC+MUSM HP min DE+USM SGCK+USM No CMS 樣本一 樣本二 樣本三 樣本四 樣本一 樣本二 樣本三 樣本四 32 Conclusion 33 Conclusion SGCK is the best method for the 3D printer Monitor No CMS SGCK 34 End 35.
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