Abstract
This technical note introduces a synthetic image generator (SIG), referred to as MicroSIG, to be used for particle image/tracking velocimetry (PIV/PTV) analysis involving defocusing or astigmatic particle images. Target applications are experimental setups with volume illumination and small depth of field, in which the defocusing of particles plays a major role. This includes for instance PIV experiments or 3D PTV methods using defocusing or astigmatism to determine the out-of-plane particle position. The software uses an approximated model of spherical lens and conventional ray tracing to create realistic defocused/astigmatic particle images within a reasonable computational time. MicroSIG can be used to compare or optimize different PIV/PTV algorithms using arbitrary flows and different conditions including, non-monodispersed particles, non-uniform illumination, astigmatic optics, non-spherical particles (spheroids). A version of the software, available in Matlab and Python, can be found in the supplementary material and at this link: https://gitlab.com/defocustracking.
Original language | English |
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Article number | 017003 |
Journal | Measurement Science and Technology |
Volume | 31 |
Issue number | 1 |
Number of pages | 5 |
ISSN | 0957-0233 |
DOIs | |
Publication status | Published - 2019 |
Keywords
- Synthetic image generator
- Particle image velocimetry
- Particle tracking velocimetry
- Defocusing
- Astigmatism
- Microscopy