Standard methods for creating digital skeletal models using structure-from-motion photogrammetry
Authors: Morgan, B., Ford, A.L.J. and Smith, M.J.
Journal: American Journal of Physical Anthropology
Volume: 169
Issue: 1
Pages: 152-160
eISSN: 1096-8644
ISSN: 0002-9483
DOI: 10.1002/ajpa.23803
Abstract:Objectives: This article assesses best practices for producing 3D digital cranial models through structure-from-motion (SfM) photogrammetry, and whether the metric accuracy and overall presentation of photogrammetric models are comparable to physical crania. It is intended to present a user-friendly standard method of creating accurate digital skeletal models using Agisoft PhotoScan. Materials and methods: Approximately 200 photographs were taken of three different crania, and were separated into series consisting of 50, 75, 100, 150, and approximately 200 photos. Forty-five cranial models were created using different photo series and a variety of PhotoScan settings. These models were assessed based on defined qualitative criteria, and model measurement estimates were compared with physical skeletal measurements using Bland–Altman plots. Results: The majority of all models (37/45) produced measurement estimates with mean differences of 2 mm or less regardless of PhotoScan settings, and therefore demonstrated high levels of agreement with the physical measurements. Models created with 150 photographs and on “high” PhotoScan settings scored the highest in terms of qualitative appearance in the shortest amount of time. Discussion: In PhotoScan, it is recommended to create cranial models using 150 photographs and “high” settings; this produces digital cranial models that are comparable to physical crania in both appearance and proportion. SfM photogrammetry is a convenient, noninvasive, and rapid 3D modeling tool that can be used in almost any setting to produce digital models, and following the guidelines established here will ensure that these models are metrically accurate.
https://eprints.bournemouth.ac.uk/32161/
Source: Scopus
Standard methods for creating digital skeletal models using structure-from-motion photogrammetry.
Authors: Morgan, B., Ford, A.L.J. and Smith, M.J.
Journal: Am J Phys Anthropol
Volume: 169
Issue: 1
Pages: 152-160
eISSN: 1096-8644
DOI: 10.1002/ajpa.23803
Abstract:OBJECTIVES: This article assesses best practices for producing 3D digital cranial models through structure-from-motion (SfM) photogrammetry, and whether the metric accuracy and overall presentation of photogrammetric models are comparable to physical crania. It is intended to present a user-friendly standard method of creating accurate digital skeletal models using Agisoft PhotoScan. MATERIALS AND METHODS: Approximately 200 photographs were taken of three different crania, and were separated into series consisting of 50, 75, 100, 150, and approximately 200 photos. Forty-five cranial models were created using different photo series and a variety of PhotoScan settings. These models were assessed based on defined qualitative criteria, and model measurement estimates were compared with physical skeletal measurements using Bland-Altman plots. RESULTS: The majority of all models (37/45) produced measurement estimates with mean differences of 2 mm or less regardless of PhotoScan settings, and therefore demonstrated high levels of agreement with the physical measurements. Models created with 150 photographs and on "high" PhotoScan settings scored the highest in terms of qualitative appearance in the shortest amount of time. DISCUSSION: In PhotoScan, it is recommended to create cranial models using 150 photographs and "high" settings; this produces digital cranial models that are comparable to physical crania in both appearance and proportion. SfM photogrammetry is a convenient, noninvasive, and rapid 3D modeling tool that can be used in almost any setting to produce digital models, and following the guidelines established here will ensure that these models are metrically accurate.
https://eprints.bournemouth.ac.uk/32161/
Source: PubMed
Standard methods for creating digital skeletal models using structure‐from‐motion photogrammetry
Authors: Morgan, B., Smith, M. and Ford, A.
Journal: American journal of physical anthropology
Volume: 169
Issue: 1
Pages: 152-160
Publisher: Wiley-Blackwell
ISSN: 0002-9483
DOI: 10.1002/ajpa.23803
Abstract:Objectives: This article assesses best practices for producing 3D digital cranial models through structure-frommotion (SfM) photogrammetry, and whether the metric accuracy and overall presentation of photogrammetric models are comparable to physical crania. It is intended to present a user-friendly standard method of creating accurate digital skeletal models using Agisoft PhotoScan.
Materials and methods: Approximately 200 photographs were taken of three different crania, and were separated into series consisting of 50, 75, 100, 150, and approximately 200 photos. Forty-five cranial models were created using different photo series and a variety of PhotoScan settings. These models were assessed based on defined qualitative criteria, and model measurement estimates were compared with physical skeletal measurements using Bland–Altman plots.
Results: The majority of all models (37/45) produced measurement estimates with mean differ- ences of 2 mm or less regardless of PhotoScan settings, and therefore demonstrated high levels of agreement with the physical measurements. Models created with 150 photographs and on “high” PhotoScan settings scored the highest in terms of qualitative appearance in the shortest amount of time.
Discussion: In PhotoScan, it is recommended to create cranial models using 150 photographs and “high” settings; this produces digital cranial models that are comparable to physical crania in both appearance and proportion. SfM photogrammetry is a convenient, noninvasive, and rapid 3D modeling tool that can be used in almost any setting to produce digital models, and following the guidelines established here will ensure that these models are metrically accurate.
https://eprints.bournemouth.ac.uk/32161/
Source: Manual
Standard methods for creating digital skeletal models using structure-from-motion photogrammetry.
Authors: Morgan, B., Ford, A.L.J. and Smith, M.J.
Journal: American journal of physical anthropology
Volume: 169
Issue: 1
Pages: 152-160
eISSN: 1096-8644
ISSN: 0002-9483
DOI: 10.1002/ajpa.23803
Abstract:Objectives
This article assesses best practices for producing 3D digital cranial models through structure-from-motion (SfM) photogrammetry, and whether the metric accuracy and overall presentation of photogrammetric models are comparable to physical crania. It is intended to present a user-friendly standard method of creating accurate digital skeletal models using Agisoft PhotoScan.Materials and methods
Approximately 200 photographs were taken of three different crania, and were separated into series consisting of 50, 75, 100, 150, and approximately 200 photos. Forty-five cranial models were created using different photo series and a variety of PhotoScan settings. These models were assessed based on defined qualitative criteria, and model measurement estimates were compared with physical skeletal measurements using Bland-Altman plots.Results
The majority of all models (37/45) produced measurement estimates with mean differences of 2 mm or less regardless of PhotoScan settings, and therefore demonstrated high levels of agreement with the physical measurements. Models created with 150 photographs and on "high" PhotoScan settings scored the highest in terms of qualitative appearance in the shortest amount of time.Discussion
In PhotoScan, it is recommended to create cranial models using 150 photographs and "high" settings; this produces digital cranial models that are comparable to physical crania in both appearance and proportion. SfM photogrammetry is a convenient, noninvasive, and rapid 3D modeling tool that can be used in almost any setting to produce digital models, and following the guidelines established here will ensure that these models are metrically accurate.https://eprints.bournemouth.ac.uk/32161/
Source: Europe PubMed Central
Standard methods for creating digital skeletal models using structure-from-motion photogrammetry.
Authors: Morgan, B., Ford, A. and Smith, M.J.
Journal: American Journal of Physical Anthropology
Volume: 169
Issue: 1
Pages: 152-160
ISSN: 0002-9483
Abstract:OBJECTIVES: This article assesses best practices for producing 3D digital cranial models through structure-from-motion (SfM) photogrammetry, and whether the metric accuracy and overall presentation of photogrammetric models are comparable to physical crania. It is intended to present a user-friendly standard method of creating accurate digital skeletal models using Agisoft PhotoScan. MATERIALS AND METHODS: Approximately 200 photographs were taken of three different crania, and were separated into series consisting of 50, 75, 100, 150, and approximately 200 photos. Forty-five cranial models were created using different photo series and a variety of PhotoScan settings. These models were assessed based on defined qualitative criteria, and model measurement estimates were compared with physical skeletal measurements using Bland-Altman plots. RESULTS: The majority of all models (37/45) produced measurement estimates with mean differences of 2 mm or less regardless of PhotoScan settings, and therefore demonstrated high levels of agreement with the physical measurements. Models created with 150 photographs and on "high" PhotoScan settings scored the highest in terms of qualitative appearance in the shortest amount of time. DISCUSSION: In PhotoScan, it is recommended to create cranial models using 150 photographs and "high" settings; this produces digital cranial models that are comparable to physical crania in both appearance and proportion. SfM photogrammetry is a convenient, noninvasive, and rapid 3D modeling tool that can be used in almost any setting to produce digital models, and following the guidelines established here will ensure that these models are metrically accurate.
https://eprints.bournemouth.ac.uk/32161/
Source: BURO EPrints