SignBridge: AI-Powered Sign Language Translation Demo

Important

Demo Repository: This is a demonstration repository showcasing the UI/UX and core technical capabilities of the SignBridge application. The current version is actively being updated.

SignBridge is a modern web application designed to break communication barriers by providing real-time American Sign Language (ASL) translation. Utilizing computer vision and machine learning, it translates hand gestures into text and speech, facilitating seamless interactions between the deaf and hearing communities.

🚀 Technical Stack

• Frontend: React (v18.3) with TypeScript
• Build Tool: Vite (v6.3)
• Styling: Tailwind CSS
• UI Components: Radix UI & Lucide React
• AI/ML: TensorFlow.js & @tensorflow-models/handpose
• Animation: Framer Motion (implied via design system)

🧠 Technical Overview

Real-Time Hand Tracking

The core of SignBridge is built on the MediaPipe Handpose model. The application captures video frames from the user's camera and processes them locally using TensorFlow.js to detect 21 distinct hand landmarks (3D coordinates).

Gesture Recognition Engine

Recognition is implemented via a heuristic-based engine that analyzes the relationships between landmarks:

• Finger Extension: Calculating the relative distance between finger tips and MCP joints.
• Palm Orientation: Determining the vector of the hand relative to the camera.
• Pattern Matching: Comparing current hand states against pre-defined ASL gesture patterns (e.g., 'Hello', 'Thank You', 'Yes/No').

Audio Synthesis

Integrated with the Web Speech API, the application provides immediate auditory feedback for recognized signs, allowing for a two-way communication flow.

✨ Key Features

• Live Recognition Feed: AI-powered overlay showing tracked hand points and real-time translation.
• Demo Mode: A simulated environment for testing features without requiring a physical camera.
• Learn Section: Interactive guides for users to practice and expand their sign language vocabulary.
• History & Analytics: Tracking of recent translations for quick reference.
• Responsive Mockup: Housed within a premium mobile viewport design to demonstrate mobile application potential.

🛠️ Development Setup

Prerequisites

• Node.js (v18 or higher)
• npm or yarn

Installation

npm install

Running the App

npm run dev

Building for Production

npm run build

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SignBridge — Breaking barriers, one sign at a time.