Rapid Path Extraction and Three-Dimensional Roaming of the Virtual Endonasal Endoscope  

作　　者：WANG Yudong HAN Jing PAN Junjun WANG Jing CAO Yi ZHU Li LUO Yanlin 

机构地区：[1]School of Artificial Intelligence,Beijing Normal University,Beijing 100875,China [2]State Key Laboratory of Virtual Reality Technology and Systems,Beihang University,Beijing 100191,China [3]Institute of Applied Physics and Computational Mathematics,Beijing 100088,China [4]Department of Otolaryngology Head and Neck Surgery,Peking University Third Hospital,Beijing 100191,China

出　　处：《Chinese Journal of Electronics》2021年第3期397-405,共9页电子学报（英文版）

基　　金：the National Natural Science Foundation of China(No.61977063,No.61872020);the National Key Research and Development Program of China(No.2017YFC0108104).

摘　　要：Compared with traditional endonasal endoscope,Virtual endonasal endoscope(VEE)is a computerized alternative solution with the advantages of being non-invasive,affordable,no perforation,low risk of infection,and high degree of sensitivity.A Central path extraction algorithm based on Pre-planning of the roaming area(CPE-PRA)is proposed to extract the central path of the nasal cavity model efficiently.And a B-spline curve fitting algorithm based on Relative center deviation(RCD)is introduced to fit a smooth curve to the extracted path,so that the virtual camera could have both a steady turning speed and a broad vision.A series of comparison tests were conducted to evaluate the effectiveness and efficiency of the proposed algorithms.

关 键 词：Virtual endonasal endoscope 3D roaming Central path extraction B-spline curve fitting 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] R319[自动化与计算机技术—计算机科学与技术]