1.8 KiB
1.8 KiB
Engine Comparison
Tesseract vs PaddleOCR
| Feature | Tesseract | PaddleOCR |
|---|---|---|
| Accuracy | 90-95% | 98%+ |
| Chinese Support | Good | Excellent |
| Speed | ~200ms init, ~50ms/img | ~3s init, ~500ms/img |
| Memory | ~100MB | ~500MB |
| Dependencies | pytesseract + cv2 + PIL |
paddleocr + paddlepaddle |
| Best For | Quick extraction, English | High accuracy, Chinese docs |
When to Use Which
Use Tesseract When:
- ✅ Extracting text from screenshots
- ✅ Processing English-only documents
- ✅ Need fast OCR (-web scraping, quick验证)
- ✅ Limited memory environment
Use PaddleOCR When:
- ✅ Processing Chinese documents
- ✅ Need high accuracy (98%+)
- ✅ Working with complex layouts（tables, forms）
- ✅ Critical data extraction (invoices, contracts)
Performance Comparison
| Task | Tesseract | PaddleOCR | Improvement |
|---|---|---|---|
| Screenshot text | ~70ms | ~600ms | Tesseract faster |
| Chinese menu | ~200ms | ~550ms | - |
| Invoice extraction | ~180ms | ~520ms | - |
| Certificate OCR | ~250ms | ~580ms | PaddleOCR more accurate |
Quality Comparison
Example: Chinese Restaurant Menu
Tesseract (confidence: 88%)
北京烤鸭
宫保鸡丁
麻婆豆腐...
PaddleOCR (confidence: 99%)
北京烤鸭
宫保鸡丁
麻婆豆腐
...
Example: English Invoice
Tesseract (confidence: 92%)
Invoice #12345
Date: 2024-03-05
Amount: $199.99
PaddleOCR (confidence: 98%)
Invoice #12345
Date: 2024-03-05
Amount: $199.99
Recommendation
- General use: Auto mode (PaddleOCR by default for quality)
- Speed-critical: Force Tesseract
- Chinese critical: Force PaddleOCR
- Production: Auto mode with fallback to PaddleOCR for low confidence