老年男性足部多维特征数据
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鞋类设计与定制：为鞋企提供老年（60岁以上）男性的足型数据库，可用于支持鞋楦设计、鞋码标准化、个性化定制；利用老年男性的脚长与鞋码偏差数据，优化现有鞋码分段，基于足长、足宽、足弓高、后跟间隙等指标，建立老年男性鞋楦模板库，供鞋企直接调用，减少打版试错成本；为运动品牌、工装鞋、康复鞋等提供老年男性的足型特征数据，支持开发适合老年男性的功能性鞋款。1、数据分析和采集：本数据来源于老年（60岁以上）男性的足部数据，包括脚长、足弓高低、足后跟间隙距离、足部分踵夹角、足部拇趾外突点长、足部第二趾端点长、足部拇指翻转角度等数据，利用这些数据分析出“鞋码推荐、足弓评测、足跟内外翻评测、足型评测、拇指内外翻评测”5个维度的结论。 2、算法说明：（1）鞋码推荐算法：根据脚长采用国家标准GB/T 3293-2017《中国鞋楦系列》的鞋码尺寸计算方式，基于脚长+10mm（放量）转换为欧码标准，左右脚独立计算，支持不对称脚型，推荐鞋码=ROUND((脚长(mm) + 10 - 12) / 5 - 10, 0)；（2）足弓评测：使用LOOKUP函数，实测足弓高低按9段阈值自动分型，足弓评测= LOOKUP(足弓高, {0,1.5,2.5,3.5,4.5,5.5,6.5,7.5,8.5}, {"9型重度扁平","8型中度扁平","7型轻度扁平","6型常态足","5型正常足","4型常态足","3型轻度高弓","2型中度高弓","1型重度高弓"})；（3）足跟内外翻评测：θ = 分踵夹角 + 1.1×后跟间隙距离；按 ±10°、±15°、±20° 分段得1-9型；（4）足型评测：Δ=第二趾端点长−拇趾外突点长；Δ>5 mm希腊脚（第二趾最长），Δ<−5 mm埃及脚（拇趾最长），其余罗马脚（1-2趾几乎平齐）；（5）足部拇指内外翻评测：拇指翻转角度 0-9° 正常、10-15° 轻度、16-20° 中度、≥21° 重度。
Footwear Design and Customization: A foot shape database for elderly males (aged 60 years and older) is provided to footwear enterprises, supporting last design, shoe size standardization and personalized customization. By leveraging the deviation data between foot length and shoe size of elderly males, the existing shoe size segmentation is optimized; based on indicators including foot length, foot width, arch height, heel clearance and other metrics, a last template library for elderly males is established, which can be directly called by footwear enterprises to reduce the trial-and-error costs of pattern making. This database also provides foot shape feature data of elderly males for sports brands, work shoes, rehabilitation shoes and other scenarios, supporting the development of functional footwear suitable for elderly males. 1. Data Analysis and Collection: The data in this dataset is collected from elderly males (aged 60 years and older), including foot length, arch height, heel clearance distance, foot heel separation angle, length of the hallux valgus prominence point of the foot, length of the second toe endpoint of the foot, hallux valgus angle and other relevant metrics. Based on these data, conclusions in five dimensions are derived: shoe size recommendation, arch evaluation, heel varus/valgus evaluation, foot shape evaluation, and hallux valgus/varus evaluation. 2. Algorithm Specifications: (1) Shoe Size Recommendation Algorithm: The shoe size calculation method specified in the national standard GB/T 3293-2017 *Chinese Last Series* is adopted based on foot length. The foot length plus 10mm (size allowance) is converted to the European size standard. Calculations are performed independently for left and right feet, supporting asymmetric foot shapes. The recommended shoe size is calculated as: Recommended Shoe Size = ROUND((Foot Length (mm) + 10 - 12) / 5 - 10, 0); (2) Arch Evaluation: The LOOKUP function is used to automatically classify the measured arch height into 9 segments based on thresholds. The arch evaluation result is calculated as: Arch Evaluation = LOOKUP(Arch Height, {0,1.5,2.5,3.5,4.5,5.5,6.5,7.5,8.5}, {"Type 9 Severe Flat Foot", "Type 8 Moderate Flat Foot", "Type 7 Mild Flat Foot", "Type 6 Normal Arch Foot", "Type 5 Normal Foot", "Type 4 Normal Arch Foot", "Type 3 Mild High Arch", "Type 2 Moderate High Arch", "Type 1 Severe High Arch"}); (3) Heel Varus/Valgus Evaluation: θ = Heel Separation Angle + 1.1 × Heel Clearance Distance; The 1-9 types are obtained by segmenting with thresholds of ±10°, ±15°, and ±20°; (4) Foot Shape Evaluation: Δ = Length of Second Toe Endpoint − Length of Hallux Valgus Prominence Point; When Δ > 5 mm, it is a Greek foot (second toe is the longest); When Δ < -5 mm, it is an Egyptian foot (hallux is the longest); The remaining cases are Roman feet (first and second toes are almost flush); (5) Hallux Valgus/Varus Evaluation: The hallux valgus angle is classified as: Normal (0-9°), Mild (10-15°), Moderate (16-20°), Severe (≥21°).
