Audience Measurement
Measure viewing time and gaze-based attention around a display, with facial expression estimates. Build the results into your own analytics.
Expression analysis · Full source code
Facial Expression Recognition Engine
Classify visible facial expressions in a camera feed and explore the estimates in your own visualization or analytics.
$325 USD · Digital source package
Checkout and downloads via Payhip. Applicable taxes calculated at checkout. Commercial license; no support or custom integration included.
ImplementationC++ / OpenCV
Browser demoWebAssembly
DeliveryDigital download
▶ Watch the recorded demonstration
Video loads only when you choose to play it.
What the engine does
- Detect faces and track them across frames.
- Run a pretrained facial expression classifier.
- Visualize the expression categories on the camera image.
- Modify the C++ pipeline and use the supplied model assets.
Where it fits
For technical teams experimenting with expression-based interfaces or visual analytics. Evaluate the output with representative inputs before deciding how it should influence your application.
What to validate before you buy
A visible expression is not a reliable statement of someone’s internal feelings, intentions or ability. Category estimates can be wrong and can vary with lighting, pose and the people represented.
Inside the download
- Complete C++ engine source
- Pretrained networks and required assets
- Code documentation
- Emscripten build instructions
- Precompiled OpenCV WebAssembly module
- Guide to building OpenCV for WebAssembly
Inspect the public code reference to understand the implementation before purchasing.
Integration essentials
Check your build environment.
- Required skills
- C++ programming, OpenCV integration and basic understanding of neural networks.
- Browser build
- Emscripten compiles the engine to WebAssembly. Follow the included instructions and use the supplied OpenCV module.
- Other platforms
- Desktop, server, mobile and edge builds require the appropriate OpenCV dependency and build configuration. Porting and platform-specific optimization are your responsibility.
- Performance
- Depends on camera resolution, face count, models, hardware and browser. Evaluate representative conditions; the browser demo is not a benchmark for every device.
License & handover
Clear terms from the start.
You may study and modify the code, integrate it into your own product that adds substantial value, and sell that product under the software license.
The supplied source must remain private. You may not resell the software as a standalone library, SDK or toolkit. Third-party components retain their own licenses.
Installation, integration, consulting, guaranteed fixes and ongoing maintenance are not included. Updates are discretionary. Review the support policy before checkout.
Digital sales are final except where required by law. Read the purchase FAQ.
Related engines
Explore adjacent capabilities.
Each engine is a separate purchase. Combining them requires integration.
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Estimate head pose and eye gaze direction from a webcam, with facial landmarks and eye openness measurements.
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Map your own 2D makeup designs onto a tracked 3D face mesh, with a working browser demonstration.