# pritomash

- **Event:** [Meta Global AI Developer Hackathon](https://cerebralvalley.ai/e/meta-ai-developer-hackathon)
- **When:** Oct 26, 12:00 PM – Nov 4, 9:00 PM (EST)
- **Where:** Online
- **Team:** [Pritom Das](https://cerebralvalley.ai/u/pritomash)
- **GitHub:** https://github.com/pritomshad/librevision
- **Demo video:** https://youtu.be/8l2l8T_-7vM
- **Gallery:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery
- **Page:** https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3465

LibreVision is an Android accessibility app that helps visually impaired people navigate and understand urban surroundings, initially targeting South-East Asia.

Problem: Route directions in Google Map or similar products do not explain what blocks the footpath or what is happening nearby in an unfamiliar surrounding. Visually impaired pedestrians need useful guidance they can access without relying on a screen.

Solutions:

- Navigation: Spoken walking directions, maps, and on-device obstacle alerts work together during a journey.
- Voice control: “Hey Vision” activates natural-language requests, destination search, app controls, and follow-up questions.
- Accessible design: Large buttons, high contrast, scalable text, short audio cues, and haptic feedback.
- Meta AI: Muse Spark 1.3 interprets selected camera views and answers questions about the user’s situation. A surroundings video provides 12 selected frames for a concise description.
- Local processing: Obstacle detection(RF-DETR nano), Monocular Depth measurement and English speech recognition(STT) run on the phone, remaining available offline after model setup.
- Privacy: Camera images are shared for cloud analysis with permission, while API credentials stay protected behind a Cloudflare Worker.

## More from Meta Global AI Developer Hackathon

- [Zero Echelon - Uplink](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3462)
- [Songjie Huang](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3463)
- [Kurta Squad](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3464)
- [Chairwise](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3466)
- [WeStride.org](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3467)
- [BillSaathi](https://cerebralvalley.ai/e/meta-ai-developer-hackathon/hackathon/gallery/3468)

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