PMID: 8970931Jan 1, 1997Paper

Tracking markers with missing data by lower rank approximation

Journal of Biomechanics
A M MuijtjensR S Reneman

Abstract

Motion and deformation of an object may be quantified by following attached markers in video or cine frame sequences. When recording cardiac motion by video (256 x 256 pixels, 50 Hz), generally no more than approximately 20 markers can be followed due to difficulties in proper identification of marker images. In the present study we developed the lower rank (LR) tracking method which can automatically follow considerably more than 20 markers. The performance of the method was evaluated in computer simulations of naturally moving myocardial markers observed in a sequence of 60 video frames. White noise was added to the marker coordinates. Realistic loss of data due to detection failure was simulated by deleting a generated marker image when the distance to another marker image was below a given minimum value. In a test, realistic values were substituted for the noise level sigma (0.5 pixel) and the minimum marker distance dm (4 pixels). For numbers of markers ranging from 50 to 100, 95-90% of the detected marker images was correctly tracked. Less than 0.7% was part of a false track, i.e. a track containing images of different markers. Under less favourable conditions (sigma = 1 pixel; dm = 8 pixels) the method was robust: for 75...Continue Reading

References

Oct 1, 1992·Journal of Biomechanics·T ArtsR S Reneman
Apr 1, 1991·Computers and Biomedical Research, an International Journal·M A Niczyporuk, D C Miller
Jan 1, 1986·Journal of Biomechanics·T T PrinzenR S Reneman
Feb 1, 1982·Computers and Biomedical Research, an International Journal·J B GarrisonK Sagawa
Jan 1, 1982·Journal of Biomechanics·K D TaylorG B Hankins
Nov 1, 1993·International Journal of Bio-medical Computing·A M MuijtjensR S Reneman
Aug 1, 1996·Journal of Biomechanics·H van BavelJ D Janssen

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Citations

Aug 5, 1999·Journal of Biomechanics·C C van DonkelaarM R Drost
Jul 24, 2002·Medical Engineering & Physics·P DesjardinsA Delisle
Nov 1, 2001·IEEE Transactions on Medical Imaging·R van der WeideM A Viergever
Dec 30, 2018·Journal of Nursing Measurement·Anastasia A MallidouLynne Young
Jul 19, 2012·Journal of Marital and Family Therapy·Kay Bradford
Jan 11, 2005·Gait & Posture·Lorenzo ChiariAurelio Cappozzo

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