Development of a change-detection method on underground air void identification by time-lapse GPR 3D imaging

Tess Xiang Huan Luo, Wallace Wai Lok Lai, Ray Kwong Wai Chang

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

This study reviews the parameters that affect GPR 3D imaging quality and proposed a guideline for establishing time-lapse GPR slice generation to detect air voids. A lab control experiment was conducted with mutual information applied to evaluating the reliability of proposed imaging workflow. Reflectance thresholding and structural similarity were explored in identifying air voids from time-lapse GPR slice series and got promising result. It was found that variation of GPR slice images come from ununiform reflection intensity. Image change detection method is feasible in extracting features from speckled GPR time lapse slices. And a more convincible GPR slice generation workflow contributes to more accurate temporal feature extraction from GPR time lapse slice.

Original languageEnglish
Title of host publication2018 17th International Conference on Ground Penetrating Radar, GPR 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Print)9781538657775
DOIs
Publication statusPublished - 20 Aug 2018
Event17th International Conference on Ground Penetrating Radar, GPR 2018 - Rapperswil, Switzerland
Duration: 18 Jun 201821 Jun 2018

Publication series

Name2018 17th International Conference on Ground Penetrating Radar, GPR 2018

Conference

Conference17th International Conference on Ground Penetrating Radar, GPR 2018
Country/TerritorySwitzerland
CityRapperswil
Period18/06/1821/06/18

Keywords

  • GPR
  • slice quality
  • temporal change detection

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Instrumentation

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