color gamut mapping for 3d printing · color gamut mapping for 3d printing 1 speaker: ... email :...
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Color Gamut Mapping for 3D Printing
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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
ICC Display & 3D Print Meeting
MAY 06 2016
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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
Personal Detail
RESEARCH PROJECT
B.S. in Electronic and computer engineering, NTUST 2010-2014
Master in Color & Illuminance technology, NTUST 2014- 2016
Yuan-Peng, Pi
EDUCATION
Color imaging processing
Cross-media color management system
RESEARCH INTEREST
EMAIL : [email protected]
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Build envelope capacity
(W x D x H)
8 x 10 x 8 in (203 x 254 x 203 mm)
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
(monochrome)
No
Number of jets 604
Material recycling Yes
Automatic build platform
cleaning
Yes
Integrated part cleaning Integrated
PROJET® 460PLUS
PROFESSIONAL 3D PRINTER
NO COLOR MANAGEMENT
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Display Printed
PROJET® 460PLUS
3D PRINTER
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Find the
Printer’s
Gamut
Gamut
Mapping
Psychophysical
Experiment
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Finding the Gamut
TC-2.83
Image
Printed
Testchart
Gamut : range of realisable colors
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Printer’s Gamut
sRGB
PROJET® 460PLUS
Find the
Printer’s GamutGamut Mapping Psychophysical
Experiment
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Model
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Device Dependent Color Transformations
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Device Independent Color Transformations
PCS
Profile Connection Space
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PCS
ICC Profile
ICC profile is a set of data that characterizes a
color input or output device, or a color space.
CIELAB or CIEXYZ
characterizes a color
input device
characterizes a color
output device
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PCS3D Printer
Input model
Destinationprofile
Sourceprofile
Printer with CMS
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PROJET® 460PLUS 3D PRINTER No CMS
Do the adjustment on the 3D model’s texture
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PCS
RGB to LABLAB to RGB
3D
Printer
map
We are going to do
Texture
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We are Going to Do
Make the LUT for from PCS to RGB
After printed
R
G
B
L* = 60
a* = 70
b* = 60
= ?
= ?
= ?
The color sent to the
printer from PC
Gamut Mapping
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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)
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Find the
Printer’s
Gamut
Gamut
Mapping
Psychophysical
Experiment
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Color Management Method
Clipping
Find the minimum distence inside the printer’s gamut
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Color Management Method
HPminDE
Find the minimum distence inside
the printer’s gamut
Find the hue angle
STEP 1 STEP 2
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Lightness
AdjustmentMapping
Step 1 Step 2
Color Management Method
SGCK
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Color Management Method
SGCK -Lightness Adjustment
Input
Output
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Color Management Method
SGCK -Lightness Adjustment
L*
C*
Before Adjustment sRGB
After Adjustment sRGB
Project 460 Plus
White Line
Green Line
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Color Management Method
SGCK -Lightness Adjustment
White Line
Green Line
optimization
L
C
Before Adjustment sRGB
After Adjustment sRGB
Project 460 Plus
*
*
30°
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Color Management Method
SGCK -Color Mapping
𝑔𝑜
𝑔𝑟
𝑂
90% of the Printer’s
Gamut
Inside : Hold Still
Outside : Do the Mapping
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Color Management Method
SGCK -Color Mapping
𝑂1𝑂3
𝑂2
Many colors look the same
after mapping
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Color Management Method
SGCK -Color Mapping
𝑔𝑜
𝑔𝑟
𝑂
50% of the Printer’s
Gamut
Inside : Hold Still
Outside : Do the Mapping
![Page 27: Color Gamut Mapping for 3D Printing · Color Gamut Mapping for 3D Printing 1 Speaker: ... EMAIL : fred71016@gmail.com. 3 Build envelope capacity ... l e v a l u e s](https://reader034.vdocuments.mx/reader034/viewer/2022051602/5ae9fbf47f8b9a36698c6bff/html5/thumbnails/27.jpg)
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Result Initial texture
Clipping HPminDE SGCK
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Result Initial texture
Clipping HPminDE SGCK
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Find the
Printer’s
Gamut
Gamut
Mapping
Psychophysical
Experiment
![Page 30: Color Gamut Mapping for 3D Printing · Color Gamut Mapping for 3D Printing 1 Speaker: ... EMAIL : fred71016@gmail.com. 3 Build envelope capacity ... l e v a l u e s](https://reader034.vdocuments.mx/reader034/viewer/2022051602/5ae9fbf47f8b9a36698c6bff/html5/thumbnails/30.jpg)
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Psychophysical
Experiment
Monitor : EIZO ColorEdge SG232W
set to sRGB
Ambient light condition was set in
the dark room
12 observers
Color Viewing Light Booth
- D65
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Psychophysical
Experiment - Pair Comparison Method
Clipping
HPminDE
SGCK
For 4 model
No CMS
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Result
-3.00
-2.50
-2.00
-1.50
-1.00
-0.50
0.00
0.50
1.00
1.50
2.00
2.50
minDE HPminDE) SGCK minDE+USM HPminDE+USM SGCK+USM NoCMS
scalevalues
樣本一 樣本二 樣本三 樣本四
-3.00
-2.50
-2.00
-1.50
-1.00
-0.50
0.00
0.50
1.00
1.50
2.00
2.50
minDE HPminDE) SGCK minDE+USM HPminDE+USM SGCK+USM NoCMS
scalevalues
樣本一 樣本二 樣本三 樣本四
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Conclusion
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Conclusion
SGCK is the best method for the 3D printer
SGCK
No CMS
Monitor
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