A computer-based image-processing system for automated analysis of holographic and shearographic fringes

Holography and shearography are two laser-based techniques which enable accuratedirect measurement of displacement and strain fields, respectively, in components under load. These techniques have also been used for nondestructive evaluation of components; defects may be revealed and assessed from an...

Full description

Saved in:
Bibliographic Details
Published inIndustrial metrology Vol. 1; no. 4; pp. 309 - 322
Main Authors Shang, H.M., Lim, K.B., Lim, E.M., Poo, A.N.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.1991
Subjects
debonds assessment
displacement-gradient measurement
displacementmeasurement
Holography
image processing
shearography
image processing
Holography
displacementmeasurement
displacement-gradient measurement
shearography
debonds assessment
Online AccessGet full text

Cover

More Information
Summary:Holography and shearography are two laser-based techniques which enable accuratedirect measurement of displacement and strain fields, respectively, in components under load. These techniques have also been used for nondestructive evaluation of components; defects may be revealed and assessed from anomalies in the interference fringe patterns. This paper describes a personal-computer-based image-processing system developed for the analysis of holographic and shearographic fringe patterns. It will also be demonstrated that the system enables accurate dimensional measurements and also estimation of both the size and depth of debonds in laminated plates.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0921-5956
DOI:10.1016/0921-5956(91)80014-7