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3D-Modeling by Ortho-Image Generation from Image Sequence. Thorsten Thormahlen Hans-Peter Seidel Max Planck Institute for Computer Science, Saarbrucken, Germany. Outline. Abstract Introduction Related Work Method Results Conclusion. Abstract. What is Semi-automatic approach?

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3d modeling by ortho image generation from image sequence

3D-Modeling by Ortho-Image Generation from Image Sequence

Thorsten Thormahlen

Hans-Peter Seidel

Max Planck Institute for Computer Science, Saarbrucken, Germany

outline
Outline
  • Abstract
  • Introduction
  • Related Work
  • Method
  • Results
  • Conclusion
abstract
Abstract
  • What is Semi-automatic approach?
  • Ortho-images can be imported as background maps in the orthographic views of any modeling package.
introduction
Introduction
  • How to generate a 3D model of a real object?
  • Answer1:Laser Scan
  • expensive
  • Have problem with reflective ,

translucent, dark or colorful surface

slide5
Answer2:Image-based modeling

-Fully automatic approach

-Semi-automatic approach

  • Taking a series of images or a video of the real object with camera
  • Recover the 3D information
related work
Related Work
  • Fully automatic approach

-Shape-from-silhouette approach[Niem 1999]

-Camera tracking[Pollefeys et al. 2004]

  • Semi-automatic approach

-Photomodeler[Eos Systems 2005]

-Facade system[Taylor et al. 1996]

-Videotrace system[van den Hengel et al. 2007]

fully automatic approach
Fully automatic approach
  • Shape-from-silhouette approach
  • Camera tracking+Multi-view stereo
semi automatic approach
Semi-automatic approach
  • Photomodeler
  • Facade System

-Mark corresponding points

  • Videotrace system
method
Method

Image sequence

exsiting

exsiting

exsiting

exsiting

exsiting

Camera tracker

of choise

Camera tracker

of choise

Camera tracker

of choise

Camera tracker

of choise

Camera tracker

of choise

Camera parameters and 3D point cloud

New modules

New modules

New modules

New modules

Placement of

Bounding box

Ortho-image

generation

Orthographic projection

exsiting

exsiting

exsiting

Modeling package of choise

Modeling package of choise

3D model

ortho image generation
Ortho-Image Generation
  • Ortho-images without geometry
results
Results

(a)Frames from the input images

(d)grayscale-coded depth

(b)Generated ortho-images

(e)Final 3D model that is modeled manually

(c)color-coded index of the video frame

slide16

Laser scan

Ortho-image-based

modeling

Evalution

slide17

(a)Original image sequence

(d)Modeling of the glass

(b)ortho-image

(e)Rendering of the reconstructed model into the original image sequence

(c)color-coded index

conclusion
Conclusion
  • Novel semi-automatic approach based on ortho-images can generate accurate 3D models
  • Workflow is easy to apply
  • Allow 3D reconstruction in more situations