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3D-Modeling by Ortho-Image Generation from Image Sequences. Thorsten Thorm¨ahlen Hans-Peter Seidel Max Planck Institute for Computer Science∗, Saarbr¨ucken, Germany ACM SIGGRAPH 2008. Introduction. Fast interactive generation of 3D models from image sequences

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3d modeling by ortho image generation from image sequences

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

Thorsten Thorm¨ahlen Hans-Peter Seidel

Max Planck Institute for Computer Science∗, Saarbr¨ucken, Germany

ACM SIGGRAPH 2008

introduction
Introduction
  • Fast interactive generation of 3D models from image sequences
  • Generate high-quality 3D model of a static object from an image sequence
  • It canbe generated for translucent or specular surfaces
introduction1
Introduction

This paper

outline
Outline
  • Introduction
  • Placement of the Bounding box
  • Ortho-image Generation
    • Ortho-images without geometry
    • Ortho-images with approximate geometry
  • Results
  • Conclusion
placement of the bounding box
Placement of the Bounding box
  • 4 × 4 matrix H describes the anisotropic similarity transformation, which has 9 parameters, 3 each for position, rotation, and anisotropic scaling.
ortho images without geometry
Ortho-images without geometry
  • If many camera views are available
  • Determine the colorintensity for that pixel directly

if min{γCj} < τ=2◦ .

ortho images with approximate geometry
Ortho-images with approximate geometry
  • If manymin{γCj} > τ
  • Then the color intensity of the pixel is determined by projecting a ray from the camera center Cj to the point
  • But we need approximate geometry now!!
ortho images with approximate geometry1
Ortho-images with approximate geometry
  • Graph-cut approach for multi-view stereo in [Vogiatzis et al. 2005]
  • For each of the voxels, a photo-consistency score is calculated
  • The graph-cut algorithm finds a cut through the edges of the graph
result
Result

video display

conclusion
Conclusion
  • Semi-automatic approach
  • High-quality and accurate 3D models from image sequences
  • Allow specular or transparent objects