Direct Estimation of the Wall Shear Rate Using Parametric Motion Models in 3D

  • Markus Jehle
  • Bernd Jähne
  • Ulrich Kertzscher
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4174)


We present a new optical-flow-based technique to estimate the wall shear rate using a special illumination technique that makes the brightness of particles dependent on the distance from the wall. The wall shear rate is derived directly (that means, without previous calculation of the velocity vector field) from two of the components of the velocity gradient tensor which in turn describes the kinematics of fluid flows up to the first order. By incorporating this into a total least squares framework, we can apply a further extension of the structure tensor technique. Results obtained both from synthetical and real data are shown, and reveal a substantial improvement compared to conventional techniques.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • Markus Jehle
    • 1
    • 2
  • Bernd Jähne
    • 1
    • 2
  • Ulrich Kertzscher
    • 3
  1. 1.Interdisciplinary Center for Scientific Computing (IWR)HeidelbergGermany
  2. 2.Institute for Environmental Physics (IUP)HeidelbergGermany
  3. 3.Labor für BiofluidmechanikCharité, UniversitätsmedizinBerlinGermany

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