Title:
開曲線フーリエ記述子を用いたX線画像処理方法及びシステム
Document Type and Number:
Japanese Patent JP5493133
Kind Code:
B2
Abstract:
3D position and attitude can be estimated in a short calculation time based on 2D projection image of an object such as an artificial joint bone or a living tissue bone when a part of the contour of the object in the 2D projection image cannot be discriminated due to a deficient part of the contour or noise. An X-ray image processing method of estimating position and attitude of a measuring object by comparing the measuring object on an X-ray projection image with a parent database storing data of a plurality of candidate objects is provided. The 3D shape of the candidate object is known, and the parent database stores an element-contour group of a plurality of candidate objects projected on 2D plane from various angles. An element-contour corresponding to the contour of said measuring object and a candidate object corresponding to the measuring object are estimated by comparing coefficient of open curve Fourier descriptors of contour of the measuring object with coefficient of open curve Fourier descriptors of each element-contour of the element-contour group, and position and attitude of the measuring object are calculated based on the element-contour corresponding to the contour of the measuring object and the candidate object corresponding to the measuring object.
Inventors:
Koji Mori
Application Number:
JP2010507242A
Publication Date:
May 14, 2014
Filing Date:
April 07, 2009
Export Citation:
Assignee:
Yamaguchi University
International Classes:
A61B6/00; G06T1/00; G06T7/60
Domestic Patent References:
| JP2000040147A | 2000-02-08 |
Other References:
JPN6009033907; 廣川俊二，有吉省吾，佐藤文香，川田哲平: 'Ｘ線単面投影像による人工膝関節の動態推定（大腿・脛骨コンポーネント投影像のオーバラップ問題とその対策' 日本機械学会論文集Ｃ編 第７２巻，第７１３号, 20060125, ｐ． １６８-１７５, 社団法人 日本機械学会
JPN6009033904; 鄭澤宇，岩田洋佳，二宮正士，田村義保: 'Ｐ形フーリエ記述子に基づくハナハス花弁の部分形状特徴の定量的評価' 育種学研究 第７巻，第３号, 20050901, ｐ． １３３-１４２, 日本育種学会
JPN6009033904; 鄭澤宇，岩田洋佳，二宮正士，田村義保: 'Ｐ形フーリエ記述子に基づくハナハス花弁の部分形状特徴の定量的評価' 育種学研究 第７巻，第３号, 20050901, ｐ． １３３-１４２, 日本育種学会
Attorney, Agent or Firm:
Eichi International Patent Office