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integrate backend with opensource LLM to read & recognise the image.
Browse files- README.md +41 -13
- api.js +52 -0
- index.html +65 -8
README.md
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```markdown
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# iKnow - Image Recognition App
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## Backend Setup
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1. Install dependencies:
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```bash
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npm install express multer tesseract.js axios form-data
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```
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2. Set up LLaMA.cpp:
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- Clone and build LLaMA.cpp: https://github.com/ggerganov/llama.cpp
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- Run the server:
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```bash
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./server -m models/ggml-model-q4_0.bin --ctx 2048
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```
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3. Start the Node.js server:
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```bash
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node api.js
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```
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## API Endpoints
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- POST `/api/analyze` - Processes an image and returns recognition results
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## Environment
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- Node.js 16+
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- Tesseract OCR
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- LLaMA.cpp server running locally
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```
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The changes integrate a backend system that:
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1. Uses Tesseract.js for OCR (text recognition)
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2. Sends the image and extracted text to a local LLaMA.cpp server for analysis
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3. Returns structured data about recognized items with confidence scores
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4. Shows results in a modal dialog
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5. Includes mock API for development without the backend
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The backend expects a running LLaMA.cpp server which can be set up following their documentation. The frontend now properly handles image capture and displays detailed results.
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api.js
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```javascript
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const express = require('express');
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const router = express.Router();
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const multer = require('multer');
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const { createWorker } = require('tesseract.js');
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const { pipeline } = require('stream/promises');
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const FormData = require('form-data');
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const fs = require('fs');
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const axios = require('axios');
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const upload = multer({ dest: 'uploads/' });
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const worker = createWorker();
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// Initialize Tesseract worker
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(async () => {
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await worker.load();
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await worker.loadLanguage('eng');
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await worker.initialize('eng');
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})();
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router.post('/analyze', upload.single('image'), async (req, res) => {
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try {
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// 1. Perform OCR on the image first
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const { data: { text } } = await worker.recognize(req.file.path);
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// 2. Send to LLM for analysis (using LLaMA.cpp as example)
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const form = new FormData();
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form.append('image', fs.createReadStream(req.file.path));
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form.append('text_context', text);
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const llmResponse = await axios.post('http://localhost:8080/analyze-image', form, {
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headers: form.getHeaders()
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});
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// Clean up the uploaded file
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fs.unlinkSync(req.file.path);
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res.json({
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description: llmResponse.data.description,
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items: llmResponse.data.items.map(item => ({
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label: item.label,
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confidence: item.confidence
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}))
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});
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} catch (error) {
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console.error('Error processing image:', error);
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res.status(500).json({ error: 'Error processing image' });
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}
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});
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module.exports = router;
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```
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index.html
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</button>
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</div>
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</nav>
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<script>
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feather.replace();
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//
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document.querySelector('[data-feather="aperture"]').closest('button').addEventListener('click', function() {
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const shutter = document.createElement('div');
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shutter.className = 'absolute inset-0 bg-white opacity-0';
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easing: 'easeInOutQuad',
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complete: () => shutter.remove()
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});
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//
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// Navigation handling
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document.querySelectorAll('nav button').forEach(button => {
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</button>
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</div>
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</nav>
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<script>
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feather.replace();
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// Mock API response for development
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if (window.location.hostname === 'localhost' || window.location.hostname === '127.0.0.1') {
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window.fetch = window.fetch || function(url, options) {
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if (url === '/api/analyze') {
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return Promise.resolve({
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json: () => ({
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description: "This appears to be a coffee mug on a wooden table. The mug is white with a simple design.",
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items: [
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{ label: "Coffee Mug", confidence: 0.92 },
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{ label: "Wooden Table", confidence: 0.87 }
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]
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})
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});
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}
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return originalFetch(url, options);
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};
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}
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// Camera shutter animation
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document.querySelector('[data-feather="aperture"]').closest('button').addEventListener('click', function() {
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const shutter = document.createElement('div');
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shutter.className = 'absolute inset-0 bg-white opacity-0';
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easing: 'easeInOutQuad',
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complete: () => shutter.remove()
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});
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// Capture and process image
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const img = document.querySelector('.relative img');
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const canvas = document.createElement('canvas');
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canvas.width = img.width;
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canvas.height = img.height;
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const ctx = canvas.getContext('2d');
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ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
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const imageData = canvas.toDataURL('image/jpeg');
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// Send to backend for processing
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fetch('/api/analyze', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify({ image: imageData })
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})
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.then(response => response.json())
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.then(data => {
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// Show results in a modal
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const resultsModal = document.createElement('div');
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resultsModal.className = 'fixed inset-0 bg-black bg-opacity-80 z-50 flex items-center justify-center p-4';
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resultsModal.innerHTML = `
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<div class="bg-white rounded-xl p-6 max-w-md w-full">
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<h3 class="text-xl font-bold mb-4">Results</h3>
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<p class="mb-4">${data.description}</p>
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<div class="grid gap-2 mb-4">
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${data.items.map(item => `
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<div class="flex items-center">
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<div class="w-3 h-3 rounded-full ${item.confidence > 0.7 ? 'bg-green-500' : 'bg-yellow-500'} mr-2"></div>
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<span>${item.label} (${Math.round(item.confidence * 100)}%)</span>
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</div>
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`).join('')}
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</div>
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<button onclick="this.closest('div').remove()" class="w-full bg-primary text-white py-2 rounded-lg">
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Close
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</button>
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</div>
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`;
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document.body.appendChild(resultsModal);
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})
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.catch(error => {
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console.error('Error:', error);
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alert('Failed to process image. Please try again.');
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});
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});
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// Navigation handling
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document.querySelectorAll('nav button').forEach(button => {
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