Digital Image Correlation for discontinuous displacement measurement using subset segmentation

Research output: Contribution to journalArticle

Abstract

Deformation measurement is normally achieved by using Digital Image Correlation (DIC) technique when deformation is not discontinuous. However, the presence of discontinuities makes the deformation process very challenging and DIC fails. An innovative technique is proposed in this study which splits the subset (segment) of an image into multiple parts and use segmented subset of the image for correlation process. The performance of the proposed technique is evaluated using different experiments where different types of discontinuities are introduced in the deformation process at different angles and having different discontinuity opening sizes. The obtained results are compared with the recently proposed Discontinuous Digital Image Correlation (DDIC) technique. The results show that the proposed technique is more reliable and having high accuracy which reaches upto 1/100th of a pixel under favorable circumstances
LanguageEnglish
Pages208-216
Number of pages9
JournalOptics and Lasers in Engineering
Volume115
DOIs
Publication statusPublished - Apr 2019

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Displacement measurement
displacement measurement
set theory
discontinuity
Pixels
pixels
Experiments

Cite this

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title = "Digital Image Correlation for discontinuous displacement measurement using subset segmentation",
abstract = "Deformation measurement is normally achieved by using Digital Image Correlation (DIC) technique when deformation is not discontinuous. However, the presence of discontinuities makes the deformation process very challenging and DIC fails. An innovative technique is proposed in this study which splits the subset (segment) of an image into multiple parts and use segmented subset of the image for correlation process. The performance of the proposed technique is evaluated using different experiments where different types of discontinuities are introduced in the deformation process at different angles and having different discontinuity opening sizes. The obtained results are compared with the recently proposed Discontinuous Digital Image Correlation (DDIC) technique. The results show that the proposed technique is more reliable and having high accuracy which reaches upto 1/100th of a pixel under favorable circumstances",
keywords = "Digital Image Correlation (DIC), DEFORMATION MEASUREMENT, discontinous displacement measurement, reconstruction of displacement fields, subset segmentation",
author = "Ghulam Hassan",
year = "2019",
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doi = "10.1016/j.optlaseng.2018.12.003",
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PY - 2019/4

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AB - Deformation measurement is normally achieved by using Digital Image Correlation (DIC) technique when deformation is not discontinuous. However, the presence of discontinuities makes the deformation process very challenging and DIC fails. An innovative technique is proposed in this study which splits the subset (segment) of an image into multiple parts and use segmented subset of the image for correlation process. The performance of the proposed technique is evaluated using different experiments where different types of discontinuities are introduced in the deformation process at different angles and having different discontinuity opening sizes. The obtained results are compared with the recently proposed Discontinuous Digital Image Correlation (DDIC) technique. The results show that the proposed technique is more reliable and having high accuracy which reaches upto 1/100th of a pixel under favorable circumstances

KW - Digital Image Correlation (DIC)

KW - DEFORMATION MEASUREMENT

KW - discontinous displacement measurement

KW - reconstruction of displacement fields

KW - subset segmentation

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T2 - Optics and Lasers in Engineering

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