Measurement of length of a single tooth using PCA-signature and bezier curve

Conference proceedings article

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Choorat P., Chiracharit W., Chamnongthai K., Onoye T.

ผู้เผยแพร่: Institute of Electronics, Information and Communication Engineers

ปีที่เผยแพร่ (ค.ศ.): 2014

Volume number: E97A

Issue number: 11

หน้าแรก: 2161

หน้าสุดท้าย: 2169

จำนวนหน้า: 9

นอก: 0916-8508

eISSN: 1745-1337

URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84924462986&doi=10.1587%2ftransfun.E97.A.2161&partnerID=40&md5=5eb020e386bb9e75267b6d8ef411e26b

ภาษา: English-Great Britain (EN-GB)

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บทคัดย่อ

In developing an automatic system of a single tooth length measurement on x-ray image, since a tooth shape is assumed to be straight and curve, an algorithm which can accurately deal with straight and curve is required. This paper proposes an automatic algorithm for measuring the length of single straight and curve teeth. In the algorithm consisting of control point determination, curve fitting, and length measurement, PCA is employed to find the first and second principle axes as vertical and horizontal ones of the tooth, and two terminal points of vertical axis and the junction of those axes are determined as three first-order control points. Signature is then used to find a peak representing tooth root apex as the forth control point. Bezier curve, Euclidean distance, and perspective transform are finally applied with determined four control points in curve fitting and tooth length measurement. In the experiment, comparing with the conventional PCA-based method, the average mean square error (MSE) of the line points plotted by the expert is reduced from 7.548 pixels to 4.714 pixels for tooth image type-I, whereas the average MSE value is reduced from 7.713 pixels and 7.877 pixels to 4.809 pixels and 5.253 pixels for left side and right side of tooth image type-H, respectively. Copyright ฉ 2014 The Institute of Electronics, Information and Communication Engineers.

คำสำคัญ

Bezier curve, Principle component analysis, Signature, Tooth root length