New approach to accuracy verification of 3D surface models: An analysis of point cloud coordinates

Wan Sun Lee, Jong Kyoung Park, Ji Hwan Kim, Hae-Young Kim, Woong Chul Kim, Chin Ho Yu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Purpose: The precision of two types of surface digitization devices, i.e., a contact probe scanner and an optical scanner, and the trueness of two types of stone replicas, i.e., one without an imaging powder (SR/NP) and one with an imaging powder (SR/P), were evaluated using a computer-aided analysis. Methods: A master die was fabricated from stainless steel. Ten impressions were taken, and ten stone replicas were prepared from Type IV stone (Fujirock EP, GC, Leuven, Belgium). The precision of two types of scanners was analyzed using the root mean square (RMS), measurement error (ME), and limits of agreement (LoA) at each coordinate. The trueness of the stone replicas was evaluated using the total deviation. A Student's t-test was applied to compare the discrepancies between the CAD-reference-models of the master die (m-CRM) and point clouds for the two types of stone replicas (α = .05). Results: The RMS values for the precision were 1.58, 1.28, and 0.98. μm along the x-, y-, and z-axes in the contact probe scanner and 1.97, 1.32, and 1.33. μm along the x-, y-, and z-axes in the optical scanner, respectively. A comparison with m-CRM revealed a trueness of 7.10. μm for SR/NP and 8.65. μm for SR/P. Conclusions: The precision at each coordinate (x-, y-, and z-axes) was revealed to be higher than the one assessed in the previous method (overall offset differences). A comparison between the m-CRM and 3D surface models of the stone replicas revealed a greater dimensional change in SR/P than in SR/NP.

Original languageEnglish
JournalJournal of Prosthodontic Research
DOIs
Publication statusAccepted/In press - 2015 Apr 20

Fingerprint

Powders
Belgium
Stainless Steel
Students
Equipment and Supplies

Keywords

  • 3D surface model
  • Accuracy
  • Point cloud
  • Precision
  • Trueness

ASJC Scopus subject areas

  • Dentistry (miscellaneous)
  • Oral Surgery

Cite this

New approach to accuracy verification of 3D surface models : An analysis of point cloud coordinates. / Lee, Wan Sun; Park, Jong Kyoung; Kim, Ji Hwan; Kim, Hae-Young; Kim, Woong Chul; Yu, Chin Ho.

In: Journal of Prosthodontic Research, 20.04.2015.

Research output: Contribution to journalArticle

@article{21b9d0893bb14d45ae439dd0fd8b0643,
title = "New approach to accuracy verification of 3D surface models: An analysis of point cloud coordinates",
abstract = "Purpose: The precision of two types of surface digitization devices, i.e., a contact probe scanner and an optical scanner, and the trueness of two types of stone replicas, i.e., one without an imaging powder (SR/NP) and one with an imaging powder (SR/P), were evaluated using a computer-aided analysis. Methods: A master die was fabricated from stainless steel. Ten impressions were taken, and ten stone replicas were prepared from Type IV stone (Fujirock EP, GC, Leuven, Belgium). The precision of two types of scanners was analyzed using the root mean square (RMS), measurement error (ME), and limits of agreement (LoA) at each coordinate. The trueness of the stone replicas was evaluated using the total deviation. A Student's t-test was applied to compare the discrepancies between the CAD-reference-models of the master die (m-CRM) and point clouds for the two types of stone replicas (α = .05). Results: The RMS values for the precision were 1.58, 1.28, and 0.98. μm along the x-, y-, and z-axes in the contact probe scanner and 1.97, 1.32, and 1.33. μm along the x-, y-, and z-axes in the optical scanner, respectively. A comparison with m-CRM revealed a trueness of 7.10. μm for SR/NP and 8.65. μm for SR/P. Conclusions: The precision at each coordinate (x-, y-, and z-axes) was revealed to be higher than the one assessed in the previous method (overall offset differences). A comparison between the m-CRM and 3D surface models of the stone replicas revealed a greater dimensional change in SR/P than in SR/NP.",
keywords = "3D surface model, Accuracy, Point cloud, Precision, Trueness",
author = "Lee, {Wan Sun} and Park, {Jong Kyoung} and Kim, {Ji Hwan} and Hae-Young Kim and Kim, {Woong Chul} and Yu, {Chin Ho}",
year = "2015",
month = "4",
day = "20",
doi = "10.1016/j.jpor.2015.10.002",
language = "English",
journal = "Journal of Prosthodontic Research",
issn = "1883-1958",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - New approach to accuracy verification of 3D surface models

T2 - An analysis of point cloud coordinates

AU - Lee, Wan Sun

AU - Park, Jong Kyoung

AU - Kim, Ji Hwan

AU - Kim, Hae-Young

AU - Kim, Woong Chul

AU - Yu, Chin Ho

PY - 2015/4/20

Y1 - 2015/4/20

N2 - Purpose: The precision of two types of surface digitization devices, i.e., a contact probe scanner and an optical scanner, and the trueness of two types of stone replicas, i.e., one without an imaging powder (SR/NP) and one with an imaging powder (SR/P), were evaluated using a computer-aided analysis. Methods: A master die was fabricated from stainless steel. Ten impressions were taken, and ten stone replicas were prepared from Type IV stone (Fujirock EP, GC, Leuven, Belgium). The precision of two types of scanners was analyzed using the root mean square (RMS), measurement error (ME), and limits of agreement (LoA) at each coordinate. The trueness of the stone replicas was evaluated using the total deviation. A Student's t-test was applied to compare the discrepancies between the CAD-reference-models of the master die (m-CRM) and point clouds for the two types of stone replicas (α = .05). Results: The RMS values for the precision were 1.58, 1.28, and 0.98. μm along the x-, y-, and z-axes in the contact probe scanner and 1.97, 1.32, and 1.33. μm along the x-, y-, and z-axes in the optical scanner, respectively. A comparison with m-CRM revealed a trueness of 7.10. μm for SR/NP and 8.65. μm for SR/P. Conclusions: The precision at each coordinate (x-, y-, and z-axes) was revealed to be higher than the one assessed in the previous method (overall offset differences). A comparison between the m-CRM and 3D surface models of the stone replicas revealed a greater dimensional change in SR/P than in SR/NP.

AB - Purpose: The precision of two types of surface digitization devices, i.e., a contact probe scanner and an optical scanner, and the trueness of two types of stone replicas, i.e., one without an imaging powder (SR/NP) and one with an imaging powder (SR/P), were evaluated using a computer-aided analysis. Methods: A master die was fabricated from stainless steel. Ten impressions were taken, and ten stone replicas were prepared from Type IV stone (Fujirock EP, GC, Leuven, Belgium). The precision of two types of scanners was analyzed using the root mean square (RMS), measurement error (ME), and limits of agreement (LoA) at each coordinate. The trueness of the stone replicas was evaluated using the total deviation. A Student's t-test was applied to compare the discrepancies between the CAD-reference-models of the master die (m-CRM) and point clouds for the two types of stone replicas (α = .05). Results: The RMS values for the precision were 1.58, 1.28, and 0.98. μm along the x-, y-, and z-axes in the contact probe scanner and 1.97, 1.32, and 1.33. μm along the x-, y-, and z-axes in the optical scanner, respectively. A comparison with m-CRM revealed a trueness of 7.10. μm for SR/NP and 8.65. μm for SR/P. Conclusions: The precision at each coordinate (x-, y-, and z-axes) was revealed to be higher than the one assessed in the previous method (overall offset differences). A comparison between the m-CRM and 3D surface models of the stone replicas revealed a greater dimensional change in SR/P than in SR/NP.

KW - 3D surface model

KW - Accuracy

KW - Point cloud

KW - Precision

KW - Trueness

UR - http://www.scopus.com/inward/record.url?scp=84947304842&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84947304842&partnerID=8YFLogxK

U2 - 10.1016/j.jpor.2015.10.002

DO - 10.1016/j.jpor.2015.10.002

M3 - Article

C2 - 26603682

AN - SCOPUS:84947304842

JO - Journal of Prosthodontic Research

JF - Journal of Prosthodontic Research

SN - 1883-1958

ER -