Gradient-based modified census transform for optical flow

  • Authors:
  • Philipp Puxbaum;Kristian Ambrosch

  • Affiliations:
  • AIT Austrian Institute of Technology, Vienna, Austria;AIT Austrian Institute of Technology, Vienna, Austria

  • Venue:
  • ISVC'10 Proceedings of the 6th international conference on Advances in visual computing - Volume Part I
  • Year:
  • 2010

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Abstract

To enable the precise detection of persons walking or running on the ground using unmannedMicro Aerial Vehicles (MAVs), we present the evaluation of the MCT algorithm based on intensity as well as gradient images for optical flow, focusing on accuracy as well as low computational complexity to enable the real-time implementation in light-weight embedded systems. Therefore, we give a detailed analysis of this algorithm on four optical flow datasets from the Middlebury database and show the algorithm's performance when compared to other optical flow algorithms. Furthermore, different approaches for sub-pixel refinement and occlusion detection are discussed.