Foot Shape Specification Data Generation for Custom Shoe Manufacturing
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Solution Overview
Problem
Conventional methods for producing custom shoes rely on skilled professionals and repeated fittings, resulting in low productivity and high costs, as they fail to ensure comfort and aesthetic appeal without actual fitting, and simply recording bare foot shapes is insufficient for producing comfortable and aesthetically pleasing shoes.
Innovation Solution
A method for generating foot shape specification data by measuring bare foot 3D data, generating a virtual insole, and correcting the data to determine the foot shape, allowing for the selection of appropriate shoe lasts and production of comfortable, aesthetically pleasing custom shoes without the need for actual fittings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods with skilled professionals are used for custom shoe production, then measurement accuracy and shoe fit can be achieved, but productivity is low and costs are high
Solution Approach 1:
The patent replaces the mechanical measurement system requiring skilled professionals with an automated 3D scanning system. The 3D scanner captures foot geometry data automatically, and computer algorithms process this data to generate shoe last models, eliminating the need for manual measurement by skilled workers and thereby increasing productivity while maintaining measurement accuracy.
Solution Approach 2:
The patent creates a digital 3D copy of the foot shape using scanning technology. This virtual model serves as the basis for generating shoe last data, allowing repeated use and processing without physical intervention. The digital copy enables automated production workflows that maintain measurement precision while significantly improving production efficiency.
2Reliability
If conventional trial and error fitting methods are used, then shoe comfort can be achieved, but production time and costs increase
Solution Approach 1:
The patent performs preliminary 3D scanning and digital modeling of the foot before shoe production begins. By capturing the complete foot geometry and generating accurate shoe last data in advance, the system eliminates the need for repeated trial fittings during production. The pre-computed digital models enable direct manufacturing, reducing production time while maintaining comfort and fit reliability.
Solution Approach 2:
The patent replaces the mechanical trial-and-error fitting process with automated computer-based shoe last generation. Algorithms process the 3D foot scan data to create optimized shoe last models that ensure proper fit and comfort, eliminating the time-consuming physical fitting iterations required in conventional methods.
3Ease of manufacture
If only bare foot shape data is recorded, then measurement simplicity is maintained, but shoe aesthetic appeal and comfort cannot be ensured
Solution Approach 1:
The patent incorporates the insole as a preliminary element in the measurement process. By scanning the foot with the insole already positioned, the system captures the complete functional geometry including the space between the foot and shoe interior. This preliminary inclusion of the insole ensures that the resulting shoe last data accurately represents the complete shoe- foot interface, enabling both precise fit and aesthetic appeal without requiring complex additional measurements.
Data Source
AI summary
A method for generating foot shape specification data includes obtaining foot shape 3D data (FS3D) by measuring the three-dimensional shape of a bare foot (BF) of a subject (P) of measurement; generating a virtual insole (VIS) for measurement based on the obtained foot shape 3D data (FS3D); generating corrected foot shape 3D data (CFSD) by adding the data of the virtual insole (VIS) to a sole portion of the obtained foot shape 3D data; and obtaining foot shape specification data (FSSD) by measuring a predefined dimension of the corrected foot shape 3D data (CFSD) to determine a foot shape.