Journal article
Accurate particle position measurement from images
Review of scientific instruments, Vol.78(5), pp.053704-053704-10
05/04/2007
DOI: 10.1063/1.2735920
PMID: 17552822
Abstract
The moment method is an image analysis technique for subpixel estimation of particle positions. The total error in the calculated particle position includes effects of pixel locking and random noise in each pixel. Pixel locking, also known as peak locking, is an artifact where calculated particle positions are concentrated at certain locations relative to pixel edges. We report simulations to gain an understanding of the sources of error and their dependence on parameters the experimenter can control. We suggest an algorithm, and we find optimal parameters an experimenter can use to minimize total error and pixel locking. For a dusty plasma experiment, we find that a subpixel accuracy of
0.017
pixel
or better can be attained. These results are also useful for improving particle position measurement and particle tracking velocimetry using video microscopy in fields including colloids, biology, and fluid mechanics.
Details
- Title: Subtitle
- Accurate particle position measurement from images
- Creators
- Y Feng - University of IowaJ Goree - University of IowaBin Liu - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Review of scientific instruments, Vol.78(5), pp.053704-053704-10
- DOI
- 10.1063/1.2735920
- PMID
- 17552822
- NLM abbreviation
- Rev Sci Instrum
- ISSN
- 0034-6748
- eISSN
- 1089-7623
- Publisher
- American Institute of Physics
- Grant note
- NASA DOE
- Language
- English
- Date published
- 05/04/2007
- Academic Unit
- Physics and Astronomy; Mechanical Engineering
- Record Identifier
- 9984199783702771
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