What is the principle of foot scanner

The core principle of the foot scanner is based on optical scanning technology and 3D modeling technology, and the digital reconstruction of the foot shape is achieved through a non-contact method. It can be specifically divided into the following technical modules:

1. Optical scanning technology

Structured light scanning ‌

By projecting a specific pattern (such as stripe light) onto the surface of the sole of the foot, the light deforms when it contacts different heights or shapes. After the built-in camera captures the deformed light spot, the three-dimensional coordinates of each point on the surface of the foot are calculated by triangulation to achieve millimeter-level precision scanning ‌.

Advantages ‌: Fast scanning speed (usually completed within a few seconds), suitable for dynamic or static scenes ‌.

Laser scanning ‌

Emitting laser beams point by point and measuring the return time or phase difference of the reflected light, high-precision three-dimensional point cloud data is generated through distance calculation. Its accuracy is higher than structured light, but the scanning speed is slower, which is suitable for scenes with high requirements for details ‌.

2. Data acquisition and processing flow

Multi-view image synthesis ‌

The scanner is equipped with multiple cameras or sensors to synchronously collect foot data from different angles, and splice them into a complete three-dimensional model through algorithms to avoid single-view blind spots ‌.

Point cloud generation and optimization

The reflected light signal is converted into tens of thousands of three-dimensional coordinate points (point clouds), which are then filtered, registered and processed to eliminate noise and improve data integrity.

3D model reconstruction

The point cloud is converted into a continuous foot model using 3D reconstruction algorithms (such as triangulation and surface fitting), which supports interactive operations such as rotation and scaling, and is convenient for analyzing parameters such as arch height and foot shape features.

3. Auxiliary functions and extended applications

Standardized operation process: Users are required to stand in a designated area with their feet placed naturally. Some devices require special scanning socks to reduce environmental interference.

Multimodal integration: Some high-end devices are combined with pressure sensors to simultaneously obtain plantar pressure distribution data for biomechanical analysis or orthopedic product customization.

4. Technical advantages

Non-invasive: Measurement can be completed without touching the foot, improving comfort and hygiene standards.

High precision and efficiency: 0.5 mm details can be captured, and the entire process usually takes no more than 30 seconds.