3D Head Model Generation for Custom Hairpiece Fitting
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Solution Overview
Problem
Existing hairpiece manufacturing methods face challenges with flat base materials that do not conform well to the curved shape of the head, leading to creases and unstable attachments, and there is a need for an efficient and convenient method to generate 3D digital head models for custom hairpiece production.
Innovation Solution
A method and system that involves scanning a subject's head using optical means to obtain 3D geometry and color information, generating a 3D model, identifying the target area for the hairpiece, and using an elastic cap with visible markings to ensure accurate positioning and fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat base material is used for the hairpiece, then the manufacturing process is simple, but the hairpiece does not fit the curved shape of the head well and causes creases
Solution Approach 1:
The patent applies curvature by forming the base material into a three-dimensional shape that conforms to the curved surface of the head. The base material is molded or shaped to match the spherical/oval geometry of the head, eliminating creases and improving fit. This transforms the flat base into a curved surface that naturally adapts to the head's anatomy.
Solution Approach 2:
The patent changes the geometric parameters of the base material from a flat two-dimensional form to a three-dimensional curved form. By modifying the shape parameters (adding curvature, depth, and volume), the base material can now accommodate the curved surface of the head while maintaining manufacturing feasibility through molding or shaping processes.
2Manufacturing precision
If a physical mold of the head is produced at a mold factory and shipped to a hairpiece factory, then the custom hairpiece can fit the customer's head well, but the process is time-consuming and inefficient
Solution Approach 1:
The patent uses digital copying technology to create a 3D digital model of the customer's head instead of producing a physical mold. The digital model serves as a virtual copy that can be transmitted electronically and used for manufacturing, eliminating the need for physical mold fabrication and shipping while maintaining the same level of custom fit accuracy.
Solution Approach 2:
The patent replaces the mechanical system of physical mold making and shipping with a digital system. Instead of physically creating and transporting a mold, the process uses optical scanning to capture head geometry and creates a digital representation that can be instantly transmitted and used for manufacturing, significantly reducing time and logistical complexity.
3Measurement precision
If optical scanning is used to obtain 3D geometry and color information, then the head's geometry and target area can be accurately captured, but the equipment and process complexity increases
Solution Approach 1:
The patent employs a multi-functional scanning system that simultaneously captures 3D geometry, color information, and target area identification in a single process. The optical scanner performs multiple measurement functions (geometric scanning, color imaging, feature detection) concurrently, reducing the need for separate devices and processes while maintaining high measurement precision.
Solution Approach 2:
The patent combines multiple scanning functions into a unified system that captures geometric data, color data, and identifies target areas (such as hair loss regions) in one integrated process. By merging these functions, the system reduces overall complexity compared to using separate devices for each measurement type, while achieving comprehensive and accurate head mapping.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise and efficient creation of custom hairpieces that conform well to the head's shape, reducing creases and improving attachment stability by accurately capturing the head's geometry and target area information.
Implementation Method 1
scanning a subject's head three-dimensionally by optical means, and obtaining 3D geometry and color information of the head
Data Source
AI summary
A method for generating a 3D digital model used in hairpiece manufacturing is disclosed, which comprises: scanning a subject's head three-dimensionally by optical means, and obtaining 3D geometry and color information of the head, the 3D geometry and the color information having a positional correspondence therebetween; generating a 3D model of the head based on the 3D geometry and color information; identifying a target area to be covered by a hairpiece based on the color information; and obtaining position of the target area based on the positional correspondence between the 3D geometry and the color information. A system for generating a 3D digital model used in hairpiece manufacturing is also disclosed, which comprises a 3D optical scanner and an electronic device.