React Native Computer Vision

Mobile computer-vision demo app built with Expo + React Native.

It includes on-device AI demos powered by react-native-executorch, plus a real-time camera pipeline using react-native-vision-camera.

Features

• Real-time Vision Camera screen with model/task switching
• Image demos for:
  • Object Detection
  • OCR
  • OCR Vertical
• Vision camera task variants:
  • Classification
  • Object Detection (SSDLite / RF-DETR / YOLO26N)
  • Segmentation (DeepLab / FCN / LRASPP / Selfie)
  • Instance Segmentation
  • OCR
  • Style Transfer

Tech Stack

• Expo SDK 54
• React Native 0.81.5
• Expo Router (file-based navigation)
• React Native Vision Camera
• React Native Worklets
• React Native ExecuTorch

Prerequisites

• Node.js LTS
• Yarn 1.x
• Xcode + CocoaPods (for iOS)
• Android Studio + SDK (for Android)

Install

yarn install

Run

iOS (recommended for this project)

yarn ios

Android

yarn android

Metro / Dev server

yarn start

Important Notes

• This app uses native modules (react-native-executorch, react-native-vision-camera, react-native-nitro-modules), so use a development build.
• Do not use Expo Go for full functionality.
• Camera permission is required (configured via NSCameraUsageDescription in app.json).

Project Structure

• app – routes/screens
• app/vision_camera/index.tsx – real-time camera + model switching UI
• components/vision_camera/tasks – per-task camera processing components
• assets – model files (.pte) and app assets

Scripts

• yarn start – start Expo dev server
• yarn ios – run iOS dev build
• yarn android – run Android dev build
• yarn web – run web target
• yarn lint – lint project

Troubleshooting

iOS build fails after dependency changes

cd ios && pod install

Then rerun:

yarn ios

VisionCamera / Worklets C++ errors

Make sure react-native-worklets is on a compatible version (0.8.1 in this project) and reinstall pods.

Watchman recrawl warning

watchman watch-del '/Users/minhazhe/Documents/react-native-computer-vision'
watchman watch-project '/Users/minhazhe/Documents/react-native-computer-vision'

License

Private project.