Journal of Textile Research ›› 2020, Vol. 41 ›› Issue (11): 136-142.doi: 10.13475/j.fzxb.20190904407

• Apparel Engineering • Previous Articles     Next Articles

Leg classification for young women based on leg shape characteristics

CHEN Xiya1, ZHAO Ying1, CAI Xiaoyu1, GU Bingfei1,2,3()   

  1. 1. Fashion College, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Clothing Engineering Research Center of Zhejiang Province, Zhejiang Sci-Tech University, Hangzhou,Zhejiang 310018, China
    3. Key Laboratory of Silk Culture Heritage and Products Design Digital Technology,Ministry of Culture and Tourism, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2019-09-10 Revised:2020-08-05 Online:2020-11-15 Published:2020-11-26
  • Contact: GU Bingfei E-mail:gubf@zstu.edu.cn

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Abstract:

In order to improve the fit and comfort of women's trousers, body classification for young women was studied and discussed according to the characteristics of leg shapes. Using three-dimensional human body scanning, image measurement and manual measurement, leg shape of 236 young women aged between 18 and 25 years were measured, and twenty characteristic parameters describing leg shape were obtained. The main characteristic factors affecting leg shape were concluded by component factor analysis, and the classification results of young women's legs were extracted by using cluster analysis. Combining with the values of knee angle, the identification rules of each leg shape category were established and the new samples were classified and verified. Consequently, the main characteristic factors that affect the leg shape were the horizontal girth, the length, the calf girth difference, the leg curvature, the leg contour, and the thigh girth difference. The leg shape was divided into three categories, i.e. round, slightly flat and flat, and the identification rules of each leg shape category were established with four variables.

Key words: young women, 3-D body measurement, leg classification, leg shape

CLC Number: 

  • TS941.17

Fig.1

3-D scanning post"

Fig.2

Shooting post"

Fig.3

Body measurement landmarks. (a)Front measurement; (b)Front curve measurement; (c)Side measurement"

Tab.1

Leg shape parameters"

序号 测量和计算变量 测量和计算方式 序号 测量和计算变量 测量和计算公式
1 大腿根宽1,2 正面图中大腿根部水平距离 11 腿外侧长1,3 以大腿根宽外侧和踝宽外侧为端点的贴合人体的曲线长
2 大腿根厚1,2 侧面图中大腿根部水平距离 12 腿内侧长1,3 以大腿根宽内侧和踝宽内侧为端点的贴合人体的曲线长
3 大腿根围1,3 大腿最高部位的水平围长 13 大腿宽厚比 大腿根宽/大腿根厚
4 膝围1,3 膝部的水平围长 14 大腿根围膝围比 大腿根围/膝围
5 小腿围1,3 小腿腿肚最粗处的水平围长 15 大腿根围小腿围比 大腿根围/小腿围
6 踝围1,3 紧靠踝骨上方最细处的水平围长 16 膝围小腿围比 膝围/小腿围
7 膝曲角1,2 以膝宽中点为顶点、以大腿长和小腿长为边的角度 17 小腿围踝围比 小腿围/踝围
8 大腿长1,2 以大腿根宽中点和膝宽中点为端点的线段长 18 膝围踝围比 膝围/踝围
9 小腿长1,2 以踝宽中点和膝宽中点为端点的线段长 19 腿内外侧长比 腿内侧长/腿外侧长
10 腿长1,2 以大腿根宽中点和踝宽中点为端点的线段长 20 大小腿长比 大腿长/小腿长

Tab.2

Error analysis of measured data"

序号 测量
部位		 测量
方式		 平均值 标准差 相关
系数		 误差
百分比/%
1 大腿
根宽		 三维 16.792 0.946 0.818 94.92
图像 17.410 1.229
2 大腿
根厚		 三维 16.930 1.265 0.918 94.92
图像 17.680 1.491
3 大腿
根围		 三维 52.621 3.485 0.981 94.08
手工 53.105 3.519
4 膝围 三维 37.524 2.597 0.969 95.34
手工 36.627 2.801
5 小腿围 三维 33.974 2.439 0.943 90.25
手工 34.226 2.504
6 踝围 三维 20.633 1.406 0.965 91.10
手工 21.716 1.595
7 膝曲角 三维 175.044 3.026 0.957 95.76
图像 175.863 2.971
8 大腿长 三维 22.954 2.629 0.985 93.64
图像 23.092 2.623
9 小腿长 三维 35.788 1.890 0.959 93.64
图像 35.726 1.895
10 腿长 三维 58.675 3.436 0.990 92.80
图像 58.559 3.565
11 腿外
侧长		 三维 58.143 3.488 0.987 92.37
手工 58.533 3.470
12 腿内
侧长		 三维 59.872 3.388 0.989 90.68
手工 59.453 3.473

Fig.4

Normal distribution Q-Q probability plot of thigh grith"

Tab.3

Component cumulative contribution rate"

成
分		 初始特征值 旋转平方和载入
特征根 方差
贡献
率/%		 累积方
差贡献
率/%		 特征根 方差
贡献
率/%		 累积方
差贡献
率/%
1 5.338 26.690 26.690 4.033 20.165 20.165
2 3.982 19.909 46.599 3.696 18.480 38.645
3 2.859 14.296 60.895 3.244 16.221 54.866
4 2.315 11.575 72.470 2.313 11.567 66.433
5 1.814 9.068 81.538 2.057 10.283 76.715
6 1.066 5.331 86.869 2.031 10.154 86.869
7 0.884 4.422 91.292

Tab.4

Rotational component matrix"

变量名称 成分
1 2 3 4 5 6
大腿根围 0.957 0.040 -0.147 -0.090 0.154 0.154
膝围 0.802 -0.019 -0.209 -0.354 -0.347 0.114
小腿围 0.806 -0.070 -0.242 -0.249 -0.274 -0.339
踝围 0.536 -0.031 -0.747 -0.127 -0.259 -0.150
大腿根厚 0.840 0.055 -0.385 -0.037 0.065 0.308
大腿根宽 0.699 -0.005 0.446 -0.146 0.216 -0.223
腿内侧长 0.044 0.971 -0.027 0.060 -0.025 0.069
腿外侧长 0.066 0.946 -0.048 0.096 -0.207 0.086
腿长 -0.087 0.906 0.036 0.104 0.199 0.099
大腿长 -0.175 0.614 -0.078 0.682 0.123 -0.015
小腿长 0.081 0.775 0.099 -0.550 0.086 0.091
膝围踝围比 -0.063 0.023 0.908 -0.133 0.049 0.302
小腿围踝围比 -0.053 -0.028 0.907 -0.036 0.125 -0.143
大腿宽厚比 -0.455 -0.048 0.627 -0.050 0.063 -0.442
大腿根围小腿围比 0.101 0.146 0.136 0.255 0.580 0.692
大小腿长比 -0.193 -0.045 -0.121 0.909 0.038 -0.055
膝曲角 0.009 0.046 0.309 0.338 -0.339 -0.306
大腿根围膝围比 0.146 0.091 0.113 0.452 0.780 0.036
腿内外侧长比 -0.091 -0.058 0.097 -0.152 0.713 -0.064
膝围小腿围比 -0.027 0.091 0.057 -0.185 -0.146 0.891

Tab.5

Cluster distribution"

聚类类型 数量/个 占比/%
1 77 32.6
2 85 36.0
3 74 31.4
总计 236 100

Fig.5

Leg types with different knee angles. (a)Knee angle is positive; (b)Knee angle is negative"

Fig.6

Simple schematic diagram of sixleg types. (a)Round leg (knee angle is positive); (b)Round leg (knee angle is negative);(c)Slightly flat leg (knee angle is positive);(d)Slightly flat leg (knee angle is negative);(e)Flat leg ( knee angle is positive); (f)Flat leg ( knee angle is negative) "

Tab.6

Classification criteria for 6 types of leg shape"

腿形 编号 大腿宽
厚比		 大腿根围
膝围比		 大小
腿长比		 膝曲角
圆体型 1-1
1-2		 0.90~1.10 1.43~1.55 0.67~0.87 正
负
稍扁
体型		 2-1
2-2		 1.00~1.20 1.30~1.43 0.65~0.83 正
负
扁体型 3-1
3-2		 1.15~1.35 1.40~1.52 0.83~1.00 正
负

Tab.7

Division of new samples"

新样本
编号		 大腿
宽厚
比		 大腿
根围膝
围比		 大小
腿长比		 预估
类别		 判别
类别
1 1.01 1.34 0.66 稍扁体型 稍扁体型
2 1.07 1.51 0.79 圆体型 圆体型
3 1.08 1.39 0.74 稍扁体型 稍扁体型
4 0.98 1.48 0.90 圆体型 圆体型
5 1.00 1.45 0.78 圆体型 圆体型
6 1.08 1.39 0.80 稍扁体型 稍扁体型
7 1.04 1.53 0.77 圆体型 圆体型
8 1.07 1.34 0.81 稍扁体型 稍扁体型
9 1.20 1.33 0.80 稍扁体型 稍扁体型
10 1.18 1.41 0.82 稍扁体型 稍扁体型
11 1.16 1.46 0.84 扁体型 扁体型
12 1.22 1.47 0.84 扁体型 扁体型
13 1.29 1.48 0.89 扁体型 扁体型
14 1.14 1.45 0.81 圆体型 扁体型
15 1.21 1.48 0.76 扁体型 扁体型
16 1.20 1.44 0.74 扁体型 扁体型
17 1.09 1.40 0.84 圆体型 稍扁体型
18 1.03 1.51 0.79 圆体型 圆体型
19 1.25 1.47 0.81 扁体型 扁体型
20 1.31 1.38 0.87 扁体型 稍扁体型

Tab.8

Discriminant analysis result"

类别 原始样本划分情况 新样本
划分情况
圆体型 稍扁体型 扁体型
预测的
分类
结果		 圆体型 83 3 2 5
稍扁体型 0 70 2 8
扁体型 2 1 73 7
总计 85 74 77 20
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