Craniofacial Stereo Mapping: Improving Accuracy With Natural Points
Stereo-photogrammetry has been reported in both photogrammetry and medical journals as the most suitable technique for craniofacial landmark mapping. Various size and shape of control frames were designed to provide three-dimensional object-space control for stereo images. A research was carried out...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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New Zealand Institute of Surveyors, Inc.
2005
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| Subjects: | |
| Online Access: | http://eprints.utm.my/2565/ http://eprints.utm.my/2565/2/kkk.pdf |
| _version_ | 1848890385296785408 |
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| author | Majid, Zulkepli Chong, Albert K. Setan, Halim Ahmad, Anuar |
| author_facet | Majid, Zulkepli Chong, Albert K. Setan, Halim Ahmad, Anuar |
| author_sort | Majid, Zulkepli |
| building | UTeM Institutional Repository |
| collection | Online Access |
| description | Stereo-photogrammetry has been reported in both photogrammetry and medical journals as the most suitable technique for craniofacial landmark mapping. Various size and shape of control frames were designed to provide three-dimensional object-space control for stereo images. A research was carried out to determine whether the accuracy could be further improved using natural points. In the research, control points and natural points were measured using photogrammetric digitising software and their coordinates computed using bundle adjustment technique. In addition, the six-camera stereo-photogrammetric system was electronically synchronized for optimum accuracy. Subsequently, a digital photogrammetric workstation was used for stereo orientation and stereo-digitising of the anthropometric landmarks. For the accuracy assessment of the ‘natural point’ technique, absolute orientation was performed on the stereo-model using control-frame control and natural points respectively. The results show that the developed technique achieves an accuracy of 0.6mm at one standard deviation. The best accuracy of the stereophotogrammetric system was 0.25mm.
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| first_indexed | 2025-11-15T20:41:14Z |
| format | Article |
| id | utm-2565 |
| institution | Universiti Teknologi Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T20:41:14Z |
| publishDate | 2005 |
| publisher | New Zealand Institute of Surveyors, Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | utm-25652017-03-09T03:58:59Z http://eprints.utm.my/2565/ Craniofacial Stereo Mapping: Improving Accuracy With Natural Points Majid, Zulkepli Chong, Albert K. Setan, Halim Ahmad, Anuar GA Mathematical geography. Cartography Stereo-photogrammetry has been reported in both photogrammetry and medical journals as the most suitable technique for craniofacial landmark mapping. Various size and shape of control frames were designed to provide three-dimensional object-space control for stereo images. A research was carried out to determine whether the accuracy could be further improved using natural points. In the research, control points and natural points were measured using photogrammetric digitising software and their coordinates computed using bundle adjustment technique. In addition, the six-camera stereo-photogrammetric system was electronically synchronized for optimum accuracy. Subsequently, a digital photogrammetric workstation was used for stereo orientation and stereo-digitising of the anthropometric landmarks. For the accuracy assessment of the ‘natural point’ technique, absolute orientation was performed on the stereo-model using control-frame control and natural points respectively. The results show that the developed technique achieves an accuracy of 0.6mm at one standard deviation. The best accuracy of the stereophotogrammetric system was 0.25mm. New Zealand Institute of Surveyors, Inc. 2005-12 Article PeerReviewed application/pdf en http://eprints.utm.my/2565/2/kkk.pdf Majid, Zulkepli and Chong, Albert K. and Setan, Halim and Ahmad, Anuar (2005) Craniofacial Stereo Mapping: Improving Accuracy With Natural Points. New Zealand Surveyor (295). pp. 5-10. ISSN 0048-0150 https://core.ac.uk/display/11779037 |
| spellingShingle | GA Mathematical geography. Cartography Majid, Zulkepli Chong, Albert K. Setan, Halim Ahmad, Anuar Craniofacial Stereo Mapping: Improving Accuracy With Natural Points |
| title | Craniofacial Stereo Mapping: Improving Accuracy With Natural Points |
| title_full | Craniofacial Stereo Mapping: Improving Accuracy With Natural Points |
| title_fullStr | Craniofacial Stereo Mapping: Improving Accuracy With Natural Points |
| title_full_unstemmed | Craniofacial Stereo Mapping: Improving Accuracy With Natural Points |
| title_short | Craniofacial Stereo Mapping: Improving Accuracy With Natural Points |
| title_sort | craniofacial stereo mapping: improving accuracy with natural points |
| topic | GA Mathematical geography. Cartography |
| url | http://eprints.utm.my/2565/ http://eprints.utm.my/2565/ http://eprints.utm.my/2565/2/kkk.pdf |