Comparison of surface extraction techniques performance in computed tomography for 3D complex micro-geometry dimensional measurements

Marta Torralba, Roberto Jiménez, José A. Yagüe-Fabra*, Sinué Ontiveros, Guido Tosello

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

102 Downloads (Pure)

Abstract

The number of industrial applications of computed tomography (CT) for dimensional metrology in 100–103 mm range has been continuously increasing, especially in the last years. Due to its specific characteristics, CT has the potential to be employed as a viable solution for measuring 3D complex micro-geometries as well (i.e., in the sub-mm dimensional range). However, there are different factors that may influence the CT process performance, being one of them the surface extraction technique used. In this paper, two different extraction techniques are applied to measure a complex miniaturized dental file by CT in order to analyze its contribution to the final measurement uncertainty in complex geometries at the mm to sub-mm scales. The first method is based on a similarity analysis: the threshold determination; while the second one is based on a gradient or discontinuity analysis: the 3D Canny algorithm. This algorithm has proven to provide accurate results in parts with simple geometries, but its suitability for 3D complex geometries has not been proven so far. To verify the measurement results and compare both techniques, reference measurements are performed on an optical coordinate measuring machine (OCMM). The systematic errors and uncertainty results obtained show that the 3D Canny adapted method slightly lower systematic deviations and a more robust edge definition than the local threshold method for 3D complex micro-geometry dimensional measurements.

Original languageEnglish
JournalInternational Journal of Advanced Manufacturing Technology
Volume97
Issue number1-4
Pages (from-to)441–453
ISSN0268-3768
DOIs
Publication statusPublished - 2018

Keywords

  • 3D complex geometry
  • Canny algorithm
  • Computed tomography
  • Surface extraction

Cite this

@article{d69ea49d308640b692159a853cd46063,
title = "Comparison of surface extraction techniques performance in computed tomography for 3D complex micro-geometry dimensional measurements",
abstract = "The number of industrial applications of computed tomography (CT) for dimensional metrology in 100–103 mm range has been continuously increasing, especially in the last years. Due to its specific characteristics, CT has the potential to be employed as a viable solution for measuring 3D complex micro-geometries as well (i.e., in the sub-mm dimensional range). However, there are different factors that may influence the CT process performance, being one of them the surface extraction technique used. In this paper, two different extraction techniques are applied to measure a complex miniaturized dental file by CT in order to analyze its contribution to the final measurement uncertainty in complex geometries at the mm to sub-mm scales. The first method is based on a similarity analysis: the threshold determination; while the second one is based on a gradient or discontinuity analysis: the 3D Canny algorithm. This algorithm has proven to provide accurate results in parts with simple geometries, but its suitability for 3D complex geometries has not been proven so far. To verify the measurement results and compare both techniques, reference measurements are performed on an optical coordinate measuring machine (OCMM). The systematic errors and uncertainty results obtained show that the 3D Canny adapted method slightly lower systematic deviations and a more robust edge definition than the local threshold method for 3D complex micro-geometry dimensional measurements.",
keywords = "3D complex geometry, Canny algorithm, Computed tomography, Surface extraction",
author = "Marta Torralba and Roberto Jim{\'e}nez and Yag{\"u}e-Fabra, {Jos{\'e} A.} and Sinu{\'e} Ontiveros and Guido Tosello",
year = "2018",
doi = "10.1007/s00170-018-1950-9",
language = "English",
volume = "97",
pages = "441–453",
journal = "International Journal of Advanced Manufacturing Technology",
issn = "0268-3768",
publisher = "Springer U K",
number = "1-4",

}

Comparison of surface extraction techniques performance in computed tomography for 3D complex micro-geometry dimensional measurements. / Torralba, Marta; Jiménez, Roberto; Yagüe-Fabra, José A.; Ontiveros, Sinué; Tosello, Guido.

In: International Journal of Advanced Manufacturing Technology, Vol. 97, No. 1-4, 2018, p. 441–453.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Comparison of surface extraction techniques performance in computed tomography for 3D complex micro-geometry dimensional measurements

AU - Torralba, Marta

AU - Jiménez, Roberto

AU - Yagüe-Fabra, José A.

AU - Ontiveros, Sinué

AU - Tosello, Guido

PY - 2018

Y1 - 2018

N2 - The number of industrial applications of computed tomography (CT) for dimensional metrology in 100–103 mm range has been continuously increasing, especially in the last years. Due to its specific characteristics, CT has the potential to be employed as a viable solution for measuring 3D complex micro-geometries as well (i.e., in the sub-mm dimensional range). However, there are different factors that may influence the CT process performance, being one of them the surface extraction technique used. In this paper, two different extraction techniques are applied to measure a complex miniaturized dental file by CT in order to analyze its contribution to the final measurement uncertainty in complex geometries at the mm to sub-mm scales. The first method is based on a similarity analysis: the threshold determination; while the second one is based on a gradient or discontinuity analysis: the 3D Canny algorithm. This algorithm has proven to provide accurate results in parts with simple geometries, but its suitability for 3D complex geometries has not been proven so far. To verify the measurement results and compare both techniques, reference measurements are performed on an optical coordinate measuring machine (OCMM). The systematic errors and uncertainty results obtained show that the 3D Canny adapted method slightly lower systematic deviations and a more robust edge definition than the local threshold method for 3D complex micro-geometry dimensional measurements.

AB - The number of industrial applications of computed tomography (CT) for dimensional metrology in 100–103 mm range has been continuously increasing, especially in the last years. Due to its specific characteristics, CT has the potential to be employed as a viable solution for measuring 3D complex micro-geometries as well (i.e., in the sub-mm dimensional range). However, there are different factors that may influence the CT process performance, being one of them the surface extraction technique used. In this paper, two different extraction techniques are applied to measure a complex miniaturized dental file by CT in order to analyze its contribution to the final measurement uncertainty in complex geometries at the mm to sub-mm scales. The first method is based on a similarity analysis: the threshold determination; while the second one is based on a gradient or discontinuity analysis: the 3D Canny algorithm. This algorithm has proven to provide accurate results in parts with simple geometries, but its suitability for 3D complex geometries has not been proven so far. To verify the measurement results and compare both techniques, reference measurements are performed on an optical coordinate measuring machine (OCMM). The systematic errors and uncertainty results obtained show that the 3D Canny adapted method slightly lower systematic deviations and a more robust edge definition than the local threshold method for 3D complex micro-geometry dimensional measurements.

KW - 3D complex geometry

KW - Canny algorithm

KW - Computed tomography

KW - Surface extraction

U2 - 10.1007/s00170-018-1950-9

DO - 10.1007/s00170-018-1950-9

M3 - Journal article

AN - SCOPUS:85044786298

VL - 97

SP - 441

EP - 453

JO - International Journal of Advanced Manufacturing Technology

JF - International Journal of Advanced Manufacturing Technology

SN - 0268-3768

IS - 1-4

ER -