Footwear Size Categorization via 3D Volume Analysis
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Solution Overview
Problem
Current shoe size standardization methods fail to accurately represent the complex three-dimensional shape of shoes, leading to inconsistent fits and high return rates in mail order sales, as they rely on one-dimensional measurements that do not account for functional or fashion additions and vary between manufacturers.
Innovation Solution
A method and device that categorize clothing and shoe sizes by analyzing the fit and size parameters of items from different manufacturers, using frequency analysis to reassign new sizes with reduced intra-class variance, allowing for a more accurate fit prediction without requiring additional measurements or customer intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If one-dimensional linear measurements are used to describe shoe size, then the standardization process becomes simple and widely applicable, but the accuracy in representing the complex three-dimensional inner shape of shoes deteriorates
Solution Approach 1:
The patent transitions from one-dimensional linear measurements to three-dimensional volumetric measurements by introducing the concept of measuring the inner volume and shape of shoes using 3D scanning technology. This allows the complex three-dimensional inner shape to be accurately captured and represented, resolving the contradiction between measurement simplicity and shape description accuracy.
Solution Approach 2:
The patent changes the measurement parameters from traditional linear dimensions (length, width) to volumetric parameters (inner volume, 3D shape metrics). By measuring the actual three-dimensional space inside the shoe and comparing it with the customer's foot volume, the system achieves more accurate fit prediction while maintaining standardization through automated 3D scanning and digital modeling.
2Adaptability or versatility
If traditional shoe size systems are used, then compatibility with existing standards is maintained, but fit accuracy deteriorates due to strong simplification and rounding
Solution Approach 1:
The patent introduces a digital 3D model of the shoe's inner volume as an intermediary between the physical shoe and the customer's foot. This digital model serves as a mediator that can be precisely measured, stored, and compared with customer foot scans, enabling accurate fit prediction without relying on simplified traditional size systems while maintaining compatibility through size category mapping.
Solution Approach 2:
The patent creates accurate digital copies of the shoe's inner three-dimensional shape using 3D scanning technology. These digital copies preserve all the geometric details of the actual shoe interior without the simplification and rounding inherent in traditional sizing systems, allowing for precise virtual fitting and accurate size recommendation.
3Measurement precision
If physical shoe trying is required to determine fit, then fit accuracy can be confirmed, but the selection process becomes more difficult and time-consuming
Solution Approach 1:
The patent replaces the mechanical process of physical shoe trying with a digital comparison system. By scanning the customer's foot to create a 3D model and comparing it digitally with the shoe's inner volume model, the system determines fit accuracy without requiring the customer to physically try on the shoe, thereby eliminating the time loss associated with repeated trying while maintaining fit confirmation accuracy.
Solution Approach 2:
The patent performs preliminary 3D scanning and digital comparison before the customer needs to make a purchasing decision. By pre-calculating the fit compatibility between the customer's foot model and the shoe's inner model, the system provides accurate fit prediction in advance, eliminating the need for time-consuming physical trying during the selection process.
4Adaptability or versatility
If multiple shoe sizes are ordered to ensure fit, then fit selection coverage is improved, but return rates and logistics costs increase
Solution Approach 1:
The patent implements a feedback mechanism where the 3D scanning system provides immediate and accurate fit prediction feedback to the customer. By precisely determining the best-fitting size through digital comparison of foot volume and shoe inner volume, the system eliminates the need for customers to order multiple sizes as a precaution, thereby reducing return rates and associated logistics costs while maintaining comprehensive fit selection coverage.
Data Source
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AI summary
The invention relates to a method and apparatus for categorizing items of clothing and a method and an apparatus for selecting footwear having an improved fit. A parameter which describes the fit and/or the size of an item of clothing is acquired by using a measurement carried out on the relevant item of clothing. This measurement is carried out for a plurality of items of clothing from different manufacturers but having an identical manufacturer clothing size, wherein a plurality of different manufacturer clothing sizes is also considered. A frequency analysis is then carried out for the occurrence of specific values for the at least one parameter for items of clothing having an identical manufacturer clothing size. The items of clothing are categorized by means of renewed allocation of the clothing size, wherein the items of clothing are allocated a new clothing size such that the parameters for the items of clothing provided with the new clothing sizes exhibit less scatter within this new clothing size.