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Optical Flow and Total Least Squares Solution for Multi-scale Data in an Over-Determined System

  • Homa Fashandi
  • Reza Fazel-Rezai
  • Stephen Pistorius
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4842)

Abstract

In this paper, we introduce a new technique to estimate optical flow fields based on wavelet decomposition. In order to block error propagation between layers of multi-resolution image pyramid, we consider information of the all pyramid levels at once. We add a homogenous smoothness constraint to the system of optical flow constraints to obtain smooth motion fields. Since there are approximations on both sides of our over determined equation system, a total least square method is used as a minimization technique. The method was tested on several standard sequences in the field and megavoltage images taken by linear accelerator devices and showed promising results.

Keywords

Optical Flow Wavelet Decomposition Coarse Level Total Little Square Smoothness Constraint 
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 2007

Authors and Affiliations

  • Homa Fashandi
    • 1
  • Reza Fazel-Rezai
    • 1
  • Stephen Pistorius
    • 2
    • 3
  1. 1.Department of Electrical and Computer Engineering, University of Manitoba, Winnipeg, MB, R3T 5V6Canada
  2. 2.Departments of Radiology & Physics and Astronomy, University of Manitoba, Winnipeg, MB, R3T 2N2Canada
  3. 3.Medical Physics, CancerCare Manitoba, Winnipeg, MB, R3E 0V9Canada

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