Principle of foot 3D scanner
I. Core technology principle
Optical scanning technology
Structured light scanning: By projecting specific light stripes onto the surface of the foot, the deformation of the light stripes caused by the difference in foot shape is used, combined with the camera to capture the image, and the three-dimensional coordinates of each point on the foot are calculated by triangulation.
Laser scanning: Projecting laser beams point by point or line, measuring the distance or deformation of the reflected light, and generating high-precision three-dimensional point cloud data, which is suitable for detailed foot feature analysis.
Multi-view image synthesis
Collect foot data from different angles through a mechanical rotating table or camera, and combine multi-view image registration technology to eliminate blind spots and splice complete three-dimensional models.
II. Data collection and processing flow
Scanning preparation
The user needs to stand in the designated area with both feet placed naturally. Some devices support scanning in full or half weight-bearing state.
Wearable special scanning socks to protect the skin or improve light reflection effect.
Light projection and capture
The scanner projects structured light or laser onto the surface of the foot, and the reflected light is captured by the built-in camera or sensor to form raw point cloud data containing spatial position information .
Data processing and modeling
After the point cloud data is processed by algorithms such as filtering and registration, a digital model of the foot is generated through 3D reconstruction technology (such as triangulation).
The model can further analyze parameters such as arch angle and pressure distribution, and output it in a CAD/CAM compatible format for customized applications .
III. Application technology features
Non-contact measurement : avoid traditional contact measurement errors and ensure data objectivity .
High precision and efficiency : millimeter-level accuracy, a single scan time of only a few seconds .
Dynamic pressure analysis : combined with pressure sensors or point cloud density analysis, quantitative evaluation of plantar pressure distribution .
Automated processing : automation of the entire process from data acquisition to model generation, reducing the need for manual intervention .
Through the comprehensive application of the above technologies, the foot 3D scanner can quickly and accurately construct a 3D model of the foot, providing data support for medical orthopedics, shoe customization and other fields.
