Conference paper Open Access

A robust technique for tracking particles over long image sequences

Hering, Frank; Merle, Michael; Wierzimok, Dietmar; Jähne, Bernd

A particle tracking technique at high particle concentration for the evaluation of flow fields beneath water waves is described. A 1-4 cm thick light sheet parallel to the main wave propagation direction was used to illuminate small polystyrol seeding particles. The depth of the light sheet was chosen such that the particles stay long enough in the illuminated area to enable tracking. An area of up to 14.0 x 9.0 cm2 is observed by a digital CCD camera. The recording of continuous image sequences at up to 60 fields/s allow an extensive study of the flow field. An automatic tracking algorithm is described allowing particles to be followed over more than 200 images at particle concentrations up to 800 particles/image (image resolution 480 x 512 pixel), yielding both Lagrangian and Eulerian vector field. The error of the computation of a velocity vector is usually below 3%.

Files (1.4 MB)
Name Size
IAPRS1995_30_5W1_074_Hering_et_al1.pdf
md5:f3a7ee0275acdf3279518bb962cccf29
1.4 MB Download
22
23
views
downloads
All versions This version
Views 2222
Downloads 2323
Data volume 31.1 MB31.1 MB
Unique views 2222
Unique downloads 2222

Share

Cite as