What is the difference between a foot scanner and a plantar pressure distribution system?

Foot scanners and plantar pressure distribution systems are often mentioned in clinical, research, and footwear customization fields, but there are essential differences in their functions and application focus:

1. Core principles differ

A foot scanner is based on 3D scanning/optical imaging principles (such as laser or structured light) and mainly acquires the geometric shape information of the foot.
It outputs static shape parameters such as foot length, foot width, arch height, and toe alignment.

A plantar pressure distribution system is based on a pressure sensor array principle, capturing plantar pressure distribution through resistive, capacitive, or piezoelectric sensors.
It outputs pressure changes in areas such as the heel, arch, and forefoot under different postures or dynamic gait conditions.

2. Output data differ

Scanner: Provides a 3D model, suitable for measuring size and shape, used for insole customization and last design.

Plantar pressure system: Provides mechanical parameters, such as peak pressure, center of pressure (COP) trajectory, loading duration, and gait cycle.

3. Application scenarios differ

Foot scanners are mainly applied in orthopedic shoe/insole customization; establishing foot shape databases; footwear production design; clinical measurements (e.g., deformity assessment, hallux valgus evaluation).

Plantar pressure distribution systems are applied in gait analysis and sports rehabilitation; diabetic foot risk assessment; injury prevention and training optimization; biomechanics research experiments.

4. Static vs. dynamic

Scanner: Mostly static measurement, completed with the foot placed on a platform.

Pressure system: Can detect both statically (standing pressure) and dynamically (pressure distribution during walking or running).

5. Value of combined use

In practical applications, the two are often used together:

• First, use a foot scanner to acquire the 3D shape of the foot and establish an accurate foot model;

• Then, use a plantar pressure distribution system to analyze gait and loading characteristics;

• Integrate the data for orthopedic shoe/insole design and rehabilitation training evaluation, forming a more complete foot health solution.