iTrace vs Pupil Core
iTrace
github.comPupil Core
pupil-labs.comSide by side
| Figure | iTrace | Pupil Core |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | — |
| Windows | — | Yes |
| macOS | — | Yes |
| Linux | Yes | Yes |
| API | — | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Eye Tracking Software | 8.4 (#2) | 7.7 (#14) |
| Integrations | The project lists OpenCV, MediaPipe, FastAPI, Uvicorn, Streamlit, Plotly, and Matplotlib as optional dependencies. | Pupil Labs lists Python, iMotions, Lab Streaming Layer, PsychoPy, MATLAB and Octave among compatible tools; its real-time API streams gaze data and scene video over a local network. |
| Purpose | iTrace is a webcam eye-movement analysis toolkit for gaze, saccades, microsaccades, and pupil measurements. | Pupil Core combines a wearable eye-tracking headset with an open-source software suite for eye-tracking research. |
Plans
In their own words
iTrace
iTrace is a free, MIT-licensed toolkit for analyzing webcam eye-tracking data, with a scientific core built on NumPy and SciPy. It computes gaze in degrees of visual angle and detects fixations, saccades, and microsaccades using I-VT, I-DT, and Engbert–Kliegl methods. Pupil tools include blink detection and interpolation, preprocessing, and eye-crop segmentation measured in pixels or relative to iris size. Affine screen-space calibration reports calibration error and gaze-quality measures. The command-line tool analyzes gaze CSV files and exports JSON reports. Optional webcam capture uses OpenCV and MediaPipe, and optional interfaces include a local HTML app using FastAPI and WebSockets and a Streamlit dashboard. Live workflows can export derived gaze, pupil, and capture CSVs. By default, the workflow does not save raw eye video or persisted eye-crop images, though live viewing may send a temporary JPEG crop to a browser over a local WebSocket. The project says its checks use synthetic ground truth rather than real eye-tracking data or a reference device. Webcam pupil size is a relative proxy, not a measurement in millimetres.
Pupil Core
Pupil Core has no write-up on Specifiction yet; its figures are above.