The velocity snake: Deformable contour for tracking in spatio-velocity space

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Description

The author presents a new active contour model for boundary tracking and position prediction of nonrigid objects, which results from applying a velocity control to the class of elastodynamical contour models, known as snakes. The proposed control term minimizes an energy dissipation function which measures the difference between the contour velocity and the apparent velocity of the image. Treating the image video-sequence as continuous measurements along time, it is shown that the proposed control results in an unbiased tracking. This is in contrast to the original snake model which is proven to be biased due to the image (object) velocity, ... continued below

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34 p.

Creation Information

Peterfreund, N. June 1, 1997.

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  • Oak Ridge National Laboratory
    Publisher Info: Oak Ridge National Lab., Center for Engineering Systems Advanced Research, TN (United States)
    Place of Publication: Tennessee

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Description

The author presents a new active contour model for boundary tracking and position prediction of nonrigid objects, which results from applying a velocity control to the class of elastodynamical contour models, known as snakes. The proposed control term minimizes an energy dissipation function which measures the difference between the contour velocity and the apparent velocity of the image. Treating the image video-sequence as continuous measurements along time, it is shown that the proposed control results in an unbiased tracking. This is in contrast to the original snake model which is proven to be biased due to the image (object) velocity, thus resulting in high sensitivity to image clutter. The motion estimation further allows for position prediction of nonrigid boundaries. Based on the proposed control approach, the author proposes a new class of real time tracking contours, varying from models with batch-mode control estimation to models with real time adaptive controllers.

Physical Description

34 p.

Notes

OSTI as DE98005994

Source

  • Other Information: PBD: Jun 1997

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  • Other: DE98005994
  • Report No.: ORNL/TM--13448
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/631265 | External Link
  • Office of Scientific & Technical Information Report Number: 631265
  • Archival Resource Key: ark:/67531/metadc693101

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Creation Date

  • June 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • Nov. 3, 2016, 6:47 p.m.

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Peterfreund, N. The velocity snake: Deformable contour for tracking in spatio-velocity space, report, June 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc693101/: accessed August 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.