An Interactive Tool for Gamut Masking Ying Song Cheryl Lau Sabine Süsstrunk École Polytechnique Fédérale de Lausanne (EPFL)
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An Interactive Tool for Gamut
Masking
Ying Song Cheryl Lau Sabine Süsstrunk
École Polytechnique Fédérale de Lausanne (EPFL)
Warm Version
Cool Version
Original Image
Images courtesy of James Gurney
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Image courtesy of Jerry Ferguson
Warm Version Cool VersionOriginal Image
Warm Version Cool VersionOriginal Image
Richard Robinson’s online tool
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Painter’s Gamut Mask Tool
Mask Panel Image Panel
Gamut Panel
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Image of birds courtesy of Kodak
Our Tool
Related Work
• Interactive gamut visualization and gamut mapping tools: [Farup et al. 2000], [Stone et al. 1988], [Kalra 1994]
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• Richard Robinson’s online gamut masking tool: Masks are intended to be printed and used as a reference when painting
• Commercial software: Adobe Photoshop, Adobe Lightroom, Adobe Speed Grade and FilmLight Baselight
• Cluster-based gamut mapping [Lau et al. 2011]
Method Overview
Input image Clusters
2D mask 3D gamut
User
interaction
Output
move
cluster
change
mask
Image courtesy of Moyan Brenn
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L*
u*
L*
u*v*
v*
Gamut
mapped
image
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Gamut Creation
2D mask 3D gamut
L*
u*v*
Intersect with sRGB
Gamut mask (L*u*v*) 3D voxel grid
Gamut boundary
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Gamut Creation
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Image Processing
Input image Clusters
• Cluster using K-Means in color and space.
Original image
Clustered image
3D clusters
Image Processing11
• Similar to [Lau et al. 2011]
L*
u*v*
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Gamut Mapping
gamut mapped image
user
interaction
output
move
cluster
change
mask
r
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Gamut Mapping
Gamut Boundary Distance Field Level-set r
ClustersOutput
Image
L*
u*
v*
L*
find the closest
point in level-
set
L*
u*
v*
u*
v*
User Interactions14
L*
u*
v*
L*
u*
v*
• Same as [Lau et al.]
Image before blending Image after blending
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1
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Blending
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Original images courtesy of Pablo Romeo
Results
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Original images courtesy of Nicholas A. Tonelli
Results
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Original images courtesy of Malik Ml Williams
Results
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Original images courtesy of Flickr user MacDonald
Results
Original Image Yellow Door Orange Door Green Door
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Original images courtesy of Flickr user colorblindPICASO
Results
Original Image Greenish Tint Image
Bluish Tint Image
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Conclusion
Interactive Gamut Masking Tool Arbitrary gamut shapes
Support local color changes
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Thank you
More information: http://ivrg.epfl.ch/research/gamut_masking
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