Initial estimation of landmark location for automated cephalometric analysis using template matching method

Indira Pramita Sari, Retno Widayati, Menik Priaminiarti, Donny Danudirdjo, Tati Latifah Mengko

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

An initial estimator algorithm, aims to localize the position of anatomical landmarks in lateral cephalogram, is presented. This proposed algorithm explores the use of affine transform and template matching to detect three essential reference points: two cephalostat projections (ear rods and nasal-positioner) and menton. The detection of cephalostat projections using template matching method are conducted in the first step. The second step, in which the initial menton positions and small expectation windows for menton are computed, is implemented using affine transform. The exact position of menton is then located within the expectation window using template matching method with sum of squared differences-based similarity measurement in the final step. Using a ten-fold cross validation scheme, we test the algorithm on 106 direct-digital lateral cephalograms. The experimental results show that the initial estimator can efficiently limit the search areas. The obtained detection rate within 4 mm accuracy window is 92.5 percent.

Original languageEnglish
Title of host publicationProceedings - 2015 4th International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering, ICICI-BME 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages159-162
Number of pages4
ISBN (Electronic)9781467378000
DOIs
Publication statusPublished - 8 Feb 2016
Event4th International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering, ICICI-BME 2015 - Bandung, Indonesia
Duration: 2 Nov 20153 Nov 2015

Publication series

NameProceedings - 2015 4th International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering, ICICI-BME 2015

Conference

Conference4th International Conference on Instrumentation, Communications, Information Technology and Biomedical Engineering, ICICI-BME 2015
Country/TerritoryIndonesia
CityBandung
Period2/11/153/11/15

Keywords

  • affine transform
  • Cephalometry
  • landmarks
  • template matching

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