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Combining Stereo and Time-of-Flight Images with Application to Automatic Plant Phenotyping

  • Yu Song
  • Chris A. Glasbey
  • Gerie W. A. M. van der Heijden
  • Gerrit Polder
  • J. Anja Dieleman
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6688)

Abstract

This paper shows how stereo and Time-of-Flight (ToF) images can be combined to estimate dense depth maps in order to automate plant phenotyping. We focus on some challenging plant images captured in a glasshouse environment, and show that even the state-of-the-art stereo methods produce unsatisfactory results. By developing a geometric approach which transforms depth information in a ToF image to a localised search range for dense stereo, a global optimisation strategy is adopted for producing smooth and discontinuity-preserving results. Since pixel-by-pixel depth data are unavailable for our images and many other applications, a quantitative method accounting for the surface smoothness and the edge sharpness to evaluate estimation results is proposed. We compare our method with and without ToF against other state-of-the-art stereo methods, and demonstrate that combining stereo and ToF images gives superior results.

Keywords

Colour Image Depth Data Stereo Image Stereo Match Depth Edge 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Yu Song
    • 1
  • Chris A. Glasbey
    • 1
  • Gerie W. A. M. van der Heijden
    • 2
  • Gerrit Polder
    • 2
  • J. Anja Dieleman
    • 3
  1. 1.Biomathematics and Statistics ScotlandEdinburghUK
  2. 2.Biometris, Wageningen URWageningenNetherlands
  3. 3.Wageningen UR Greenhouse HorticultureWageningenNetherlands

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