Distortion compensation for generalized stereoscopic particle image velocimetry

S. M. Soloff, Ronald Adrian, Z. C. Liu

Research output: Contribution to journalArticle

447 Citations (Scopus)

Abstract

Optical distortion due to inaccurate optical alignment, lens nonlinearity, and/or refraction by optical windows, fluid interfaces, and other optical elements of an experiment causes inaccuracy by introducing variable magnification. Since fractional changes in the magnification have a one-to-one effect on the accuracy of measuring the velocity, it is important to compensate for such distortions. A general experimental calibration procedure is described which determines the magnification matrix of a distorted imaging system, and an algorithm is presented to compute accurate velocity field displacements from measurements of distorted PIV images. These procedures form a basis for generalized stereoscopic PIV procedures which permit easy electronic registration of multiple cameras and accurate recombination of stereoscopic displacement fields to obtain the three-dimensional velocity vector field.

Original languageEnglish (US)
Pages (from-to)1441-1454
Number of pages14
JournalMeasurement Science and Technology
Volume8
Issue number12
DOIs
StatePublished - Dec 1997
Externally publishedYes

Fingerprint

particle image velocimetry
magnification
Velocity measurement
Velocity Field
Optical Alignment
Refraction
Optical devices
Inaccurate
Imaging System
Recombination
Imaging systems
Registration
Lens
refraction
Lenses
Vector Field
Calibration
Fractional
velocity distribution
Camera

ASJC Scopus subject areas

  • Polymers and Plastics
  • Ceramics and Composites
  • Materials Science (miscellaneous)

Cite this

Distortion compensation for generalized stereoscopic particle image velocimetry. / Soloff, S. M.; Adrian, Ronald; Liu, Z. C.

In: Measurement Science and Technology, Vol. 8, No. 12, 12.1997, p. 1441-1454.

Research output: Contribution to journalArticle

@article{3d66eee953ca43b8ac99c090d278f34d,
title = "Distortion compensation for generalized stereoscopic particle image velocimetry",
abstract = "Optical distortion due to inaccurate optical alignment, lens nonlinearity, and/or refraction by optical windows, fluid interfaces, and other optical elements of an experiment causes inaccuracy by introducing variable magnification. Since fractional changes in the magnification have a one-to-one effect on the accuracy of measuring the velocity, it is important to compensate for such distortions. A general experimental calibration procedure is described which determines the magnification matrix of a distorted imaging system, and an algorithm is presented to compute accurate velocity field displacements from measurements of distorted PIV images. These procedures form a basis for generalized stereoscopic PIV procedures which permit easy electronic registration of multiple cameras and accurate recombination of stereoscopic displacement fields to obtain the three-dimensional velocity vector field.",
author = "Soloff, {S. M.} and Ronald Adrian and Liu, {Z. C.}",
year = "1997",
month = "12",
doi = "10.1088/0957-0233/8/12/008",
language = "English (US)",
volume = "8",
pages = "1441--1454",
journal = "Measurement Science and Technology",
issn = "0957-0233",
publisher = "IOP Publishing Ltd.",
number = "12",

}

TY - JOUR

T1 - Distortion compensation for generalized stereoscopic particle image velocimetry

AU - Soloff, S. M.

AU - Adrian, Ronald

AU - Liu, Z. C.

PY - 1997/12

Y1 - 1997/12

N2 - Optical distortion due to inaccurate optical alignment, lens nonlinearity, and/or refraction by optical windows, fluid interfaces, and other optical elements of an experiment causes inaccuracy by introducing variable magnification. Since fractional changes in the magnification have a one-to-one effect on the accuracy of measuring the velocity, it is important to compensate for such distortions. A general experimental calibration procedure is described which determines the magnification matrix of a distorted imaging system, and an algorithm is presented to compute accurate velocity field displacements from measurements of distorted PIV images. These procedures form a basis for generalized stereoscopic PIV procedures which permit easy electronic registration of multiple cameras and accurate recombination of stereoscopic displacement fields to obtain the three-dimensional velocity vector field.

AB - Optical distortion due to inaccurate optical alignment, lens nonlinearity, and/or refraction by optical windows, fluid interfaces, and other optical elements of an experiment causes inaccuracy by introducing variable magnification. Since fractional changes in the magnification have a one-to-one effect on the accuracy of measuring the velocity, it is important to compensate for such distortions. A general experimental calibration procedure is described which determines the magnification matrix of a distorted imaging system, and an algorithm is presented to compute accurate velocity field displacements from measurements of distorted PIV images. These procedures form a basis for generalized stereoscopic PIV procedures which permit easy electronic registration of multiple cameras and accurate recombination of stereoscopic displacement fields to obtain the three-dimensional velocity vector field.

UR - http://www.scopus.com/inward/record.url?scp=0031386326&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031386326&partnerID=8YFLogxK

U2 - 10.1088/0957-0233/8/12/008

DO - 10.1088/0957-0233/8/12/008

M3 - Article

AN - SCOPUS:0031386326

VL - 8

SP - 1441

EP - 1454

JO - Measurement Science and Technology

JF - Measurement Science and Technology

SN - 0957-0233

IS - 12

ER -