Parametric Body Model for Accurate 3D Measurement
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Solution Overview
Problem
Accurate body measurements are challenging in fashion e-commerce due to high inter-person variability and difficulty in reliably identifying landmarks on the human body, leading to measurement errors and high product return rates.
Innovation Solution
A computer-implemented method using a parametric body model (PBM) for 3D reconstruction, allowing for stable and accurate measurement definitions by fitting a human-shaped template to a 3D representation, enabling reliable and precise measurements, including volumetric measurements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a measuring tape is used for body measurements, then the measurement process is simple and quick, but the measurement precision is poor due to high inter-person variability and difficulty in identifying landmarks
Solution Approach 1:
The patent creates a 3D digital copy (reconstruction) of the human body from scan data, replacing the physical measuring tape process. This digital replica allows for consistent, repeatable measurements without the variability inherent in manual tape measurements, directly addressing the measurement precision problem while maintaining operational simplicity through automated processing
Solution Approach 2:
The patent replaces the mechanical measuring tape system with a computational system that processes 3D scan data through algorithms. This substitution eliminates the mechanical limitations of manual measurement and provides precise, objective measurements based on digital geometry rather than human operator variability
2Reliability
If manual tape measurements are taken, then the process requires minimal equipment, but the reliability of measurements is low leading to high product return rates
Solution Approach 1:
The system performs self-service by automatically processing the 3D scan data and generating measurements without requiring manual intervention. The automated algorithm consistently applies measurement protocols to the digital body model, eliminating human error and ensuring reliable, repeatable measurements that directly improve product return rates
Solution Approach 2:
The patent transforms the measurement process from physical parameters (tape length, manual positioning) to digital parameters (3D coordinates, geometric calculations). This parameter transformation enables consistent, objective measurements that are not affected by operator variability, thereby improving reliability while maintaining efficiency through automated computation
3Measurement precision
If a 3D reconstruction with parametric body model is used, then measurement precision and reliability are improved, but the device complexity and processing requirements increase
Solution Approach 1:
The patent segments the measurement process into distinct modular components: 3D scan acquisition, body model fitting, landmark identification, and measurement calculation. This segmentation allows each component to be optimized independently and simplifies the overall system architecture, making the complex measurement process more manageable and maintainable
Data Source
AI summary
A method for performing at least one measurement on a 3D reconstruction of a body using a computer system is disclosed, given a parametric body model, PBM, template and a measurement definition. The PBM template is adapted to be parametrized at least with respect to shape and pose. The measurement definition defines one or more measurement instructions. A PBM instance is generated by fitting the PBM template to the 3D reconstruction at least with respect to a body pose and a body shape. The one or more measurement instructions are mapped to the PBM instance, and a measurement according to at least one of the one or more mapped measurement instructions is performed. At least one measurement instruction of the one or more measurement instructions is given as one of a definition of one or more segments between respective measurement points, a definition of a cycle and a definition of a volume.