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Proceedings Paper

Prospects for super-resolution with particle image velocimetry
Author(s): Richard D. Keane; Ronald J. Adrian
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Paper Abstract

High image density PIV is used to improve spatial resolution by ensuring that each interrogation spot gives a vector measurement. In this case the resolution is determined by the size of the interrogation volume. It is argued that the ultimate resolution of PIV is determined by the smaller of the mean spacing between particles and the displacement of the particles between light pulses, and that in the high image density limit, these distances are smaller than the interrogation spot size. Thus, it should be possible to improve spatial resolution to values less than the interrogation spot diameter. We refer to this as super-resolution. A method of achieving super-resolution by using a combination of correlation analysis of the group of particles in a spot and sub-interrogation spot particle tracking is described and evaluated.

Paper Details

Date Published: 2 December 1993
PDF: 11 pages
Proc. SPIE 2005, Optical Diagnostics in Fluid and Thermal Flow, (2 December 1993); doi: 10.1117/12.163712
Show Author Affiliations
Richard D. Keane, Univ. of Illinois/Urbana-Champaign (United States)
Ronald J. Adrian, Univ. of Illinois/Urbana-Champaign (United States)

Published in SPIE Proceedings Vol. 2005:
Optical Diagnostics in Fluid and Thermal Flow
Soyoung Stephen Cha; James D. Trolinger, Editor(s)

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