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Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications
Among the multiple factors influencing the accuracy of Computed Tomography measurements, the surface extraction process is a significant contributor. The location of the surface for metrological applications is generally based on the definition of a gray value as a characteristic of similarity to de...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120033/ https://www.ncbi.nlm.nih.gov/pubmed/30126142 http://dx.doi.org/10.3390/ma11081461 |
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author | Ontiveros, Sinué Jiménez, Roberto Yagüe-Fabra, José A. Torralba, Marta |
author_facet | Ontiveros, Sinué Jiménez, Roberto Yagüe-Fabra, José A. Torralba, Marta |
author_sort | Ontiveros, Sinué |
collection | PubMed |
description | Among the multiple factors influencing the accuracy of Computed Tomography measurements, the surface extraction process is a significant contributor. The location of the surface for metrological applications is generally based on the definition of a gray value as a characteristic of similarity to define the regions of interest. A different approach is to perform the detection or location of the surface based on the discontinuity or gradient. In this paper, an adapted 3D Deriche algorithm based on gradient information is presented and compared with a previously developed adapted Canny algorithm for different surface types. Both algorithms have been applied to nine calibrated workpieces with different geometries and materials. Both the systematic error and measurement uncertainty have been determined. The results show a significant reduction of the deviations obtained with the Deriche-based algorithm in the dimensions defined by flat surfaces. |
format | Online Article Text |
id | pubmed-6120033 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-61200332018-09-05 Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications Ontiveros, Sinué Jiménez, Roberto Yagüe-Fabra, José A. Torralba, Marta Materials (Basel) Article Among the multiple factors influencing the accuracy of Computed Tomography measurements, the surface extraction process is a significant contributor. The location of the surface for metrological applications is generally based on the definition of a gray value as a characteristic of similarity to define the regions of interest. A different approach is to perform the detection or location of the surface based on the discontinuity or gradient. In this paper, an adapted 3D Deriche algorithm based on gradient information is presented and compared with a previously developed adapted Canny algorithm for different surface types. Both algorithms have been applied to nine calibrated workpieces with different geometries and materials. Both the systematic error and measurement uncertainty have been determined. The results show a significant reduction of the deviations obtained with the Deriche-based algorithm in the dimensions defined by flat surfaces. MDPI 2018-08-17 /pmc/articles/PMC6120033/ /pubmed/30126142 http://dx.doi.org/10.3390/ma11081461 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ontiveros, Sinué Jiménez, Roberto Yagüe-Fabra, José A. Torralba, Marta Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications |
title | Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications |
title_full | Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications |
title_fullStr | Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications |
title_full_unstemmed | Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications |
title_short | Analysis of Surface Extraction Methods Based on Gradient Operators for Computed Tomography in Metrology Applications |
title_sort | analysis of surface extraction methods based on gradient operators for computed tomography in metrology applications |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6120033/ https://www.ncbi.nlm.nih.gov/pubmed/30126142 http://dx.doi.org/10.3390/ma11081461 |
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