Teeth are some of the most resilient tissues of the human body. Because of their placement, teeth often yield intact indicators even when other metrics, such as finger prints and DNA, are missing. Forensics on dental identification is now mostly manual work which is time and resource intensive. Systems for automated human identification from dental X-ray images have the potential to greatly reduce the necessary efforts spent on dental identification, but it requires a system with high stability and accuracy so that the results can be trusted.
This paper proposes a new system for automated dental X-ray identification. The scheme extracts tooth and dental work contours from the X-ray images and uses the Hausdorff-distance measure for ranking persons. This combination of state-of-the-art approaches with a novel lowest cost path-based method for separating a dental X-ray image into individual teeth, is able to achieve comparable and better results than what is available in the literature.
The proposed scheme is fully functional and is used to accurately identify people within a real dental database. The system is able to perfectly separate 88.7% of the teeth in the test set. Further, in the verification process, the system ranks the correct person in top in 86% of the cases, and among the top five in an astonishing 94% of the cases. The approach has compelling potential to significantly reduce the time spent on dental identification.
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 H. H. A. Diaa Eldin M. Nassar “A Prototype Automated Dental Identification System (ADIS).” 2003.
 G. Fahmy D. Nassar E. Haj-Said H. Chen O. Nomir J. Zhou R. Howell H. H. Ammar M. Abdel-Mottaleb and A. K. Jain “Towards an Automated Dental Identification System (ADIS)” in Biometric Authentication ser. Lecture Notes in Computer Science D. Zhang and A. K. Jain Eds. Springer Berlin Heidelberg Jan. 2004 no. 3072 pp. 789–796.
 M. Abdel-Mottaleb O. Nomir D. Nassar G. Fahmy and H. Ammar “Challenges of Developing an Automated Dental Identification System” in 2003 IEEE 46th Midwest Symposium on Circuits and Systems vol. 1 Dec. 2003 pp. 411–414 Vol. 1.
 I. A. Pretty and D. Sweet “Forensic Dentistry: A Look at Forensic Dentistry Part 1: The Role of Teeth in the Determination of Human Identity” British Dental Journal vol. 190 no. 7 pp. 359–366 Apr. 2001.
 J. Zhou and M. Abdel-Mottaleb “A Content-based System for Human Identification Based on Bitewing Dental X-ray Images” Pattern Recognition vol. 38 no. 11 pp. 2132–2142 Nov. 2005.
 L. Vincent “Morphological Grayscale Reconstruction in Image Analysis: Applications and Efficient Algorithms” IEEE Transactions on Image Processing vol. 2 pp. 176–201 1993.
 E. Said D. Nassar G. Fahmy and H. Ammar “Teeth Segmentation in Digitized Dental X-ray Films Using Mathematical Morphology” IEEE Transactions on Information Forensics and Security vol. 1 no. 2 pp. 178–189 Jun. 2006.
 M. Mahoor and M. Abdel-Mottaleb “Automatic Classification of Teeth in Bitewing Dental Images” vol. 5 Oct. 2004 pp. 3475–3478 Vol. 5.
 E. Said G. F. Fahmy D. Nassar and H. Ammar “Dental X-ray Image Segmentation” vol. 5404 2004 pp. 409–417. [Online]. Available: http://dx.doi.org/10.1117/12.541658
 J. Zhou and M. Abdel-Mottaleb “Automatic Human Identification Based on Dental X-ray Images” vol. 5404 2004 pp. 373–380.
 M. H. Mahoor and M. Abdel-Mottaleb “Classification and Numbering of Teeth in Dental Bitewing Images” Pattern Recognition vol. 38 no. 4 pp. 577–586 Apr. 2005.
 F. Aeini and F. Mahmoudi “Classification and Numbering of Posterior Teeth in Bitewing Dental Images” in 2010 3rd International Conference on Advanced Computer Theory and Engineering (ICACTE) vol. 6 Aug. 2010 pp. V6–66–V6–72.
 Y. H. Lai and P. L. Lin “Effective Segmentation for Dental X-Ray Images Using Texture-Based Fuzzy Inference System” in Advanced Concepts for Intelligent Vision Systems ser. Lecture Notes in Computer Science J. Blanc-Talon S. Bourennane W. Philips D. Popescu and P. Scheunders Eds. Springer Berlin Heidelberg 2008 no. 5259.
 P. L. Lin Y. H. Lai and P. W. Huang “An Effective Classification and Numbering System for Dental Bitewing Radiographs Using Teeth Region and Contour Information” Pattern Recognition vol. 43 no. 4 pp. 1380–1392 Apr. 2010.
 P.-L. Lin Y.-H. Lai and P.-W. Huang “Dental Biometrics: Human Identification Based on Teeth and Dental Works in Bitewing Radiographs” Pattern Recognition vol. 45 no. 3 pp. 934–946 Mar. 2012.
 V. Pushparaj U. Gurunathan and B. Arumugam “An Effective Dental Shape Extraction Algorithm Using Contour Information and Matching by Mahalanobis Distance” Journal of Digital Imaging vol. 26 no. 2 Apr. 2013.
 F. Shamsafar “A New Feature Extraction Method From Dental X-ray Images for Human Identification” in 2013 8th Iranian Conference on Machine Vision and Image Processing (MVIP) Sep. 2013 pp. 397–402.
 R. C. Gonzalez and R. E. Woods Digital Image Processing 3rd 2008.
 O. Nomir and M. Abdel-Mottaleb “A System for Human Identification From X-ray Dental Radiographs” Pattern Recognition vol. 38 no. 8 Aug. 2005.
 —— “Hierarchical Dental X-Ray Radiographs Matching” in 2006 IEEE International Conference on Image Processing Oct. 2006 pp. 2677–2680.
 —— “Human Identification From Dental X-Ray Images Based on the Shape and Appearance of the Teeth” IEEE Transactions on Information Forensics and Security vol. 2 no. 2 pp. 188–197 Jun. 2007.
 —— “Fusion of Matching Algorithms for Human Identification Using Dental X-Ray Radiographs” IEEE Transactions on Information Forensics and Security vol. 3 no. 2 pp. 223–233 Jun. 2008.
 —— “Hierarchical Contour Matching for Dental X-ray Radiographs” Pattern Recognition vol. 41 no. 1 pp. 130–138 Jan. 2008.
 N. Al-sherif G. Guo and H. Ammar “A New Approach to Teeth Segmentation” in 2012 IEEE International Symposium on Multimedia (ISM) Dec. 2012 pp. 145–148.
 A. K. Jain H. Chen and S. Minut “Dental Biometrics: Human Identification Using Dental Radiographs” in Proc. of 4th Int’l Conf. on Audio- and Video-Based Biometric Person Authentication (AVBPA 2003 pp. 429–437.
 M. Omanovic and J. J. Orchard “Image Registration-Based Approach to Ranking Dental X-Ray Images for Human Forensic Identification” Canadian Society of Forensic Science Journal vol. 41 no. 3 pp. 125–134 Jan. 2008.
 A. K. Jain and H. Chen “Matching of Dental X-ray Images for Human Identification” Pattern Recognition vol. 37 no. 7 pp. 1519–1532 Jul. 2004.
 B. H. Le Z. Deng J. Xia Y.-B. Chang and X. Zhou “An Interactive Geometric Technique for Upper and Lower Teeth Segmentation” in Medical Image Computing and Computer-Assisted Intervention MICCAI 2009 ser. Lecture Notes in Computer Science G.-Z. Yang D. Hawkes D. Rueckert A. Noble and C. Taylor Eds. Springer Berlin Heidelberg 2009 no. 5762 pp. 968–975.
 H. Chen and A. Jain “Dental Biometrics: Alignment and Matching of Dental Radiographs” in Seventh IEEE Workshops on Application of Computer Vision 2005. WACV/MOTIONS ’05 Volume 1 vol. 1 Jan. 2005 pp. 316–321.
 —— “Tooth Contour Extraction for Matching Dental Radiographs” in Proceedings of the 17th International Conference on Pattern Recognition 2004. ICPR 2004 vol. 3 Aug. 2004 pp. 522–525 Vol.3.
 M. Hofer and A. Marana “Dental Biometrics: Human Identification Based On Dental Work Information” in XX Brazilian Symposium on Computer Graphics and Image Processing 2007. SIBGRAPI 2007 Oct. 2007.
 S. Shah A. Abaza A. Ross and H. Ammar “Automatic Tooth Segmentation Using Active Contour Without Edges” in Biometric Consortium Conference 2006 Biometrics Symposium: Special Session on Research at the Sep. 2006 pp. 1–6.
 D. E. M. Nassar and H. H. Ammar “A Neural Network System for Matching Dental Radiographs” Pattern Recognition vol. 40 no. 1 pp. 65–79 Jan. 2007.
 P. Marquez-Neila L. Baumela and L. Alvarez “A Morphological Approach to Curvature-Based Evolution of Curves and Surfaces” IEEE Transactions on Pattern Analysis and Machine Intelligence vol. 36 no. 1 pp. 2–17 Jan. 2014.