Opencap

Musculoskeletal forces from smartphone video
Get Started
OpenCap is an open source software developed at Stanford University
View the preprint of our manuscript.

Source code will be released upon paper publication.

Kinematics are automatically computed in the cloud now, and utilities for computing forces will be coming soon.
opencap video

How it works

Step 01
Get OpenCap's iOS app

Our iOS app allows you to collect synchronous videos on iPods, iPhones, and iPads.

Step 02
Use OpenCap's secure web app to collect data

Our web app allows you to record videos and visualize motion data.

Step 03
Leverage OpenCap's cloud servers to compute motion and forces

Our algorithms automatically compute skeletal motion and musculoskeletal forces.

Step 04
Use OpenCap's utilities to process data

Our utilities allow you to post-process and visualize your data.

Example applications
Walking
Sit-to-stand
Squats
Drop jumps

Key features

01
Low-cost and easy to use
  • No specialized hardware, software, or expertise required.
  • Only need 2 iOS devices.
  • Automated cloud computing.
02
Accurate motion and forces
  • Skeletal motion from a constrained biomechanical model.
  • Musculoskeletal forces from dynamic simulation.
  • Validated against marker-based motion capture and force plates.
03
Fast and portable
  • Setup in 5 minutes.
  • Collect data anywhere with internet.
  • Compute kinematics in minutes.
04
Secure
  • Compliant with Stanford University High Risk Data Cloud computing requirements.
  • All data are encrypted in transit and at rest.
  • Leverages AWS HIPAA compliant cloud computing.

Want to learn more?

Team

Scott Uhlrich
Scott Uhlrich
,
PhD

Research Engineer at Stanford University

Antoine Falisse
Antoine Falisse
,
PhD

Postdoctoral Fellow at Stanford University

Lukasz kidzinski
Lukasz kidzinski
,
PhD

Research Engineer at Stanford University

Jennifer Hicks
Jennifer Hicks
,
PhD

Research Engineer at Stanford University

Scott Delp
Scott Delp
,
PhD

Professor of bioengineering, mechanical engineering, and orthopaedic surgery at Stanford University

info

Contact

For technical questions, please use our forum.
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