Gaussian Light Field: Estimation of Viewpoint-Dependent...
Transcript of Gaussian Light Field: Estimation of Viewpoint-Dependent...
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Yuta Itoh, Toshiyuki Amano, Daisuke Iwai, and Gudrun Klinker
Gaussian Light Field: Estimation of Viewpoint-Dependent Blur for Optical See-Through Head-Mounted Displays
IEEE ISMAR 2016, Tue. 20th Sep. 2016
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IEEE ISMAR 2016, Tue. 20th Sep. 2016Yuta Itoh, Toshiyuki Amano, Daisuke Iwai, and Gudrun Klinker
Gaussian Light Field: Estimation of Viewpoint-Dependent Blur for Optical See-Through Head-Mounted Displays
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Blur artifacts in HMDs
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Head-Mounted Displays (HMDs)4/28
Non Optical See-Through
Optical See-Through (OST-HMD)
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We want make AR with HMD real
Magic Leap, 2016
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Realism in AR (with OST HMDs)
Visual
[Kiyokawa ’01] [Liu ’08] [Lee ’09]
Spatial
[Azuma ’95] [Tuceryan ’00] [Genc ’02] [Grubert ‘08]
Temporal
[Zheng ’14] [Lincoln ’16]
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Realism in AR (with OST HMDs)
Visual
[Kiyokawa ’01] [Liu ’08] [Lee ’09]
Spatial
[Azuma ’95] [Tuceryan ’00] [Genc ’02] [Grubert ‘08]
Temporal
[Zheng ’14] [Lincoln ’16]
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Image blur in (OST-)HMDsIdeal Output
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Image blur in (OST-)HMDsActual observation
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Image blur in (OST-)HMDsIdeal Output
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Image blur in (OST-)HMDsActual observation
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Image blur Impulse Responses
Impulse responses
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Image blur Impulse Responses
Impulse responses
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Why do we care about ?
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Related Work: SharpView
SharpView: Improved Clarity of Defocused Content on Optical See-Through Head-Mounted Displays, Oshima et al. 2015
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Related Work: Pinlight Displays
“Pinlight Displays: Wide Field of View Augmented Reality Eyeglassesusing Defocused Point Light Sources” Maimone et al., TOG’14
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Related Work: Pinlight Displays
“Pinlight Displays: Wide Field of View Augmented Reality Eyeglassesusing Defocused Point Light Sources” Maimone et al., TOG’14
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Related Work: Light field displays
The Light Field Stereoscope,Huan et al., SIGGRPAH 2015
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Optics Designs of OST-HMDs
(Free-form)prism
Point source
Waveguide
Laser source
Half-mirror
Eye
Prism-based
Waveguide-based
Half-mirror
Based on: Hainich and Bimber, Displays Fundamentals and Applications, 2011
Retinal Scanning
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View-dependent
Image blur in HMDs
Non-linear (and RGB-wise)
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Image Undistortion for OST-HMDsImage Undistortion for OST-HMDs
Itoh et al.IEEE TVCG ‘15 (VR ’15) & IEEE ISMAR ‘15
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How to model?4D Light Field model + Point Spread
Function (PSF)
Itoh et al.IEEE TVCG ‘15 (VR ’15) & IEEE ISMAR ‘15
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origin
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origin
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origin
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origin
PSF
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origin
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origin
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origin
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origin
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1/
u
Gaussian
origin
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NVIS ST60 Lumus DK32
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A cubic prism Holographic gratings
NVIS ST60 Lumus DK32
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NVIS ST60 Lumus DK32
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Data collection
Raw image
Filtered(Raw PSF)
Training PSF
Input
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Data collectionIdeal view Observed PSF (filtered) Estimated PSF Baseline PSF
Raw Image
Raw PSFTraining
PSFBaseline
(Avg. PSF)
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LearningTraining data Regression
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ST60
Better Better Better
Testing
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We failed to get enough # of data for the red channel
DK32
Better Better
Testing
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e.g., Jones et al., IEEE 3DUI 2016
Future work Best PSF model?
Eye orientation+model
Real-time processing
?… ……
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Spatio-Visual Realism in AR Image blur in HMDs
View-dep. blur model 4D light field
+ Point Spread Functions
Evaluation on two HMDs Cubic prism & Waveguides
Summary
Contact: [email protected]
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Appendix
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Related Work: Multi-focus HMDs
Liu et al. 2008
Konrad et al. 2016
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O
MM’
C
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Observed viewSimulated view
with Observed PSFSimulated view
with Estimated PSFSimulated view
with Baseline PSF
Testing
No difference???
Raw PSFEstimated
PSFBaseline
(Avg. PSF)
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Local v.s. Global sampling
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- Global: 80,000 points
+ Local: <150 points/grid