computer vision for content augmented realitychateaut.free.fr/attachments/visar1_4handout.pdf ·...

Computer Vision for Augmented Reality

2014

T. Chateau1

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Content

Institut PascalT. Chateau

1.Introduction!2.Detectors and Descriptors for

Augmented Reality!3.Geometry for Augmented Reality!4.Localization and Tracking for

Augmented Reality!

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2

Introduction

Institut PascalT. Chateau

Augmented  reality  is  nowadays  a  wonderful  communica4on  tool    

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3

Introduction

Institut PascalT. Chateau

Augmented  reality  is  nowadays  a  wonderful  communica4on  tool    

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Introduction

Institut PascalT. Chateau

AR:  defini4on  

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Defining characteristics [Azuma 97]!1.Combine real and virtual images (both

can be seen at the same time)!2.Interactive in real-time!3.Registered in 3D (virtual objects

appear fixed in space)!!

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Introduction

Institut PascalT. Chateau

AR  Vs  RV  

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Virtual reality: replaces reality!!!Augmented reality: enhances reality!!

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  

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8

Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  

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9

Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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10

Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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To be estimated

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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Scene  augmenta4on:  

Localiza4on  

Object  augmenta4on:  

Tracking  

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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2D  localiza4on  

planar  geometry  

!

3D  localiza4on  

more  complex  geometry  

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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The Classical AR localization process!1.Interest Point Detector !2.Descriptor!3.Matching!4.Pose Estimation !5.Augmented objects projection!!

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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The Classical AR localization process!1.Interest Point Detector !

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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The Classical AR localization process!2.)Descriptor!

! (z1,z2,z3,…,Zn)(…)

(…)

(…)…

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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The Classical AR localization process!Matching!!

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

18

The Classical AR localization process!Pose estimation!!

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Introduction

Institut PascalT. Chateau

AR:  how  does  it  works?  a  geometrical  point  of  view  

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The Classical AR localization process!Augmented objects projection!!

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