Affiliations: Department of Civil Engineering, Kinki University,
3-4-1 Kowakae, Higashi Osaka, Osaka, 577-0818 Japan
Abstract: An algorithm for particle identification in PTV, which is classified
in the category .particle mask correlation method,.is presented and tested. A
typical brightness pattern of a particle image is referred to as a particle
mask. The particle mask is centered on a pixel in the image plane and the cross
correlation between the particle mask and a region of the image plane centered
on the given pixel is calculated. The particle mask is scanned over the entire
image plane and the cross correlation coefficient is calculated at each pixel
location. Small subareas with high correlation coefficients indicate central
areas of particle images.