A Portable Surface Roughness Measurement System Using Laser Speckle Imaging Based on GLCM

Aditya Budi Pradana, Prawito Prajitno

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Laser is a light that has a coherent and high intensity compared to other light sources. If the rough surface is illuminated by a laser beam, speckle patterns will be formed, this occurs because of the laser light scattering. The speckle laser pattern holds a lot of information, one of which is the level of roughness of a surface. This research study aims to measure the level of surface roughness in a metal plate. For that purpose, a simple system has been developed to acquire laser speckle images generated from a metal surface that is illuminated by laser. This system consists of a laser source, beam expander and a CMOS camera. In order to process the speckle patterns, a digital image processing algorithm is used based on Gray Level Co-occurrence Matrix (GLCM) analysis. The sample used in this study is nickel metal, which is processed by flat grinding. To calibrate the measurement system used 6 standard specimens from Surface Roughness Comparator with different surface roughness levels. The results obtained show a good correlation between the level of roughness and Contrast features generated by the GLCM analysis. The testing for the accuracy and precision of this measurement system has also been carried out in this study, with accuracy of 96% and 97% precision. Apart from having relatively good precision and accuracy, this measurement system has several other advantages, which are non-contact and easy to use for in-process measurements.

Original languageEnglish
Title of host publicationProceedings of the 2019 6th International Conference on Instrumentation, Control, and Automation, ICA 2019
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages100-105
Number of pages6
ISBN (Electronic)9781728109169
DOIs
Publication statusPublished - Jul 2019
Event6th International Conference on Instrumentation, Control, and Automation, ICA 2019 - Bandung, Indonesia
Duration: 31 Jul 20192 Aug 2019

Publication series

NameProceedings of the 2019 6th International Conference on Instrumentation, Control, and Automation, ICA 2019

Conference

Conference6th International Conference on Instrumentation, Control, and Automation, ICA 2019
Country/TerritoryIndonesia
CityBandung
Period31/07/192/08/19

Keywords

  • GLCM
  • image processing
  • laser speckle
  • surface roughness

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