福建省成年女性足部多维特征数据
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鞋类设计与定制：为鞋企提供区域性足型数据库，支持鞋楦设计、鞋码标准化、个性化定制；利用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，建立分龄、分码鞋楦模板库，供鞋企直接调用，减少打版试错成本；为运动品牌、工装鞋、康复鞋等提供足型特征数据，支持开发适合不同场景的功能性鞋款。1、数据分析和采集：本数据来源于福建省区域的成年女性的足部数据，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: Provide regional foot shape databases for footwear enterprises, supporting last design, shoe size standardization, and personalized customization; optimize existing shoe size segmentation using data on the deviation between foot length and shoe size; establish age- and size-specific last template libraries based on metrics such as foot length, foot width, arch height, and heel gap, which can be directly called by footwear enterprises to reduce pattern-making trial-and-error costs; provide foot shape feature data for sports brands, work boots, rehabilitation shoes, etc., to support the development of functional footwear suitable for different scenarios. 1. Data Analysis and Collection: This dataset is sourced from foot data of adult females in Fujian Province, including foot length, arch height, heel gap distance, foot heel separation angle, length of the hallux valgus prominence, length of the second toe endpoint, hallux valgus angle, and other relevant metrics. Based on these data, conclusions in 5 dimensions are derived: "shoe size recommendation, arch evaluation, heel varus/valgus evaluation, foot shape evaluation, and hallux valgus/varus evaluation". 2. Algorithm Description: (1) Shoe Size Recommendation Algorithm: The calculation follows the shoe size specification of the national standard GB/T 3293-2017 "Last Series for China". The foot length plus 10mm (allowance) is converted to European shoe size standards. Calculations are performed independently for left and right feet to support asymmetric foot shapes. The recommended shoe size is calculated as: `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 tiers based on predefined thresholds. The arch evaluation result is calculated as: `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 Neutral Foot", "Type 5 Normal Foot", "Type 4 Normal Neutral Foot", "Type 3 Mild Cavus Foot", "Type 2 Moderate Cavus Foot", "Type 1 Severe Cavus Foot"])` (3) Heel Varus/Valgus Evaluation: Let θ = heel_separation_angle + 1.1 × heel_gap_distance; The results are classified into 9 types based on thresholds of ±10°, ±15°, and ±20°. (4) Foot Shape Evaluation: Let Δ = second_toe_endpoint_length - hallux_valgus_prominence_length; 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 nearly flush). (5) Hallux Valgus/Varus Evaluation: The hallux valgus angle is classified as: 0-9°: Normal; 10-15°: Mild; 16-20°: Moderate; ≥21°: Severe.
