Close Range Photogrammetry Technique:: A validation study on craniofacial soft tissue measurement

Ab Rahman, Shaifulizan, Micheal Ong Ah Hup, Professor, Majid

ISBN 10: 3838375807 / ISBN 13: 9783838375809

Published by LAP LAMBERT Academic Publishing, 2010

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Bibliographic Details

• Title: Close Range Photogrammetry Technique:: A validation study on craniofacial soft tissue measurement
• Publisher: LAP LAMBERT Academic Publishing
• Publication Date: 2010
• Language: English
• ISBN 10: 3838375807
• ISBN 13: 9783838375809
• Binding: Paperback
• Condition: Like New
• Book Type: book

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Synopsis

In this study, the alternative non-contact measuring method, close range photogrammetry technique was used to measure human facial ladmarks. The validity of this method was then tested by comparing to the direct measurement method. 32 male adults with normal facial appearance were included in this study as the subjects for both methods. The differences in measurements between the two methods for 6 dependent variables were calculated using paired student t-test. Through the study it was found that the agreement between the two methods was excellent, yielding correlation coefficient between 0.887 and 1.09. No evidence of difference was found in 4 measurements (P>0.05), which were not involved with the hairy surface. Approximately 95% of the indirect method measurements are within 3.5mm of the direct measurements, and 95% are within 3.0mm when the 2 measurements of the hairy surface were excluded. The findings suggested that the close range photogrammetry technique is a reliable method in measuring facial landmarks in both linear and curve measurements.

About the Author

Shaifulizan Ab. Rahman: BDS, M.Clin.Dent.(Oral Surgery). Senior lecturer/Consultant Oral and Maxillofacial Surgery, School of Dental Sciences, Universiti Sains Malaysia. Researcher in the field of craniofacial deformity and dental implantology. Professor Micheal Ong Ah Hup: BDS, Msc, Phd. Zulkifli Majid: Bsc(Hons), Msc.