基于体表特征点的青年男性臂根曲线拟合

Kaili Liu, Hongshu Jin
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引用次数: 1

摘要

本文的目的是得到一个真实地反映人体臂根尺寸和形状的臂根曲线函数。制作并扫描青年男性上臂石膏模型,提取归一化定义下描述真实臂根形状的肩点、腋窝前后点和腋窝点4个特征点的三维坐标,并对5个地标进行附加确认,提高拟合精度。然后,基于最小二乘多项式拟合方法,分别生成9个特征点和9个标记点的臂根曲线整体拟合和分段拟合;与整体拟合相比,以腋前后点连线分割的分段拟合函数对臂根形态拟合程度较高,r²为1,拟合曲线与石膏曲线的长度差在误差范围内为0.003 cm。并提供了具有标准特征点的基本曲线模型,通过曲线拟合逼真地模拟臂根形态,实现准确的体尺提取。
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Arm-Root Curve Fitting Based on Body Surface Feature Points for Young Male
This paper is aiming to obtain an arm-root curve function performing the human arm-root size and shape realistically. A gypsum replica of upper arm for young male was made and scanned for extracting the 3D coordinates of 4 feature points of shoulder point, the anterior/posterior armpit point and the axillary point describing the real arm-root shape under the normalized definitions, and the 5 landmarks were confirmed additionally for improving the fitting precision. Then, the wholly and piecewise fitting of arm-root curve with 9 feature points and mark points in total were generated respectively based on least square polynomial fitting method. Comparing to the wholly fitting, the piecewise fitted function segmented by the line between anterior and posterior axillary points showed a high fitting degree of arm-root morphology with R-square of 1, the length difference between fitted curve and gypsum curve is 0.003 cm within error range. And it provided a basic curve model with standard feature points to simulate arm-root morphology realistically by curve fitting for accurate body measurement extraction.
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