Analysis of INDICA: INteraction-free DIsplay CAlibration for - - PowerPoint PPT Presentation

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Feb 27, 2023 403 likes •575 views

1/15 Performance and Sensitivity Analysis of INDICA: INteraction-free DIsplay CAlibration for Optical See-Through Head-Mounted Displays Yuta Itoh and Gudrun Klinker TUM, ISMAR2014, 12 th Sep 2014 2/15 Head-Mounted Displays Non Optical

SLIDE 1

TUM, ISMAR2014, 12th Sep 2014

Yuta Itoh and Gudrun Klinker

Performance and Sensitivity Analysis of INDICA:

INteraction-free DIsplay CAlibration for Optical See-Through Head-Mounted Displays

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SLIDE 2

Non Optical See-Through

Head-Mounted Displays

Optical See-Through OST-HMD

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SLIDE 3

Consistency issues in OST-HMDs Temporal

[Zheng ’14] [Didier ’05]

Visual

[Kiyokawa ’01] [Liu ’08] [Lee ’09]

Spatial

[Azuma ’95] [Tuceryan ’00] [Genc ’02]

Social

Image from Google Glass: Don't Be A Glasshole | Mashable

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SLIDE 4

Spatial Consistency of OST-HMDs Virtual Real Not consistent Consistent

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SLIDE 5

Find a Projection from 3D to 2D

Spatial Calibration of OST-HMD

3D 2D Projection HMD Eye

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SLIDE 6

Manual Method needs user interaction

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SLIDE 7

Manual Method needs user interaction

[Tuceryan ’00] [Genc ’02]

SPAAM Single Point Active Alignment Method

3D 2D Projection HMD Eye

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SLIDE 8

Automated Method interaction-free

3D 2D Projection

INDICA INteraction-free DIsplay CAlibration [Itoh ‘14]

tracks the eyeball center

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SLIDE 9

 Large systematic error

Problem of INDICA

Reprojection Error [pixel]

INDICA

Repeated SPAAM

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SLIDE 10

INDICA needs intensive precalibration

SPAAM INDICA

17DoF*†

DoF*

# of param.

How sensitive is INDICA to the parameters? E S

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* Except for precalibration of the world tracking system † Full setup

SLIDE 11

 E.g. screen position

is error prone

Predicted Error of INDICA

E S

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SLIDE 12

Observed Error of INDICA

 Added artificial error

to the real data

E S

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SLIDE 13

 Is really a pinhole camera?

 Human eyes are not simple

Optical and visual axes

 HMD screens are not planer [Owen ‘04]

Retinal, Light-field

“Eye-HMD” Camera Modeling

Image by Soerfm Owen ‘04

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SLIDE 14

 Automated OST-HMD

calibration, INDICA, still has systematic errors

 Sensitivity analysis helps

us to identify the error sources

 Better eye-HMD

modeling is desirable

Summary

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SLIDE 15

[D04] INDICA Demo [T08] OST-HMD calibration tutorial

 Jens Gurbert and Yut Itoh

Slides http://stctutorial.icg.tugraz.at/

Any questions?

This project has received funding from the European Union’s Seventh Framework Programme for research, technological development and demonstration under PITN- GA-2012-316919-EDUSAFE.

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