> ## Documentation Index
> Fetch the complete documentation index at: https://docs.upsonic.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Tesseract

> Google's open-source OCR engine with 100+ language support

## What is Tesseract?

Google's open-source OCR engine with 100+ language support. Best for traditional OCR with extensive language coverage.

## Usage

```python theme={null}
from upsonic.ocr import OCR
from upsonic.ocr.layer_1.engines import TesseractOCREngine
# Also available: from upsonic.ocr import TesseractOCREngine

# Create engine instance
engine = TesseractOCREngine(languages=['eng'], enhance_contrast=True)

# Create OCR orchestrator
ocr = OCR(layer_1_ocr_engine=engine)

# Extract text
text = ocr.get_text('receipt.jpg')
print(text)

# Custom Tesseract configuration
engine_custom = TesseractOCREngine(languages=['eng'], psm=3, oem=3)
ocr_custom = OCR(layer_1_ocr_engine=engine_custom)
result = ocr_custom.process_file('document.pdf')
print(f"Text: {result.text}")
```

## Parameters

| Parameter | Type | Default | Description |
| - | - | - | - |
| `languages` | List\[str] | `['eng']` | List of Tesseract language codes |
| `tesseract_cmd` | str | `None` | Path to tesseract executable |
| `confidence_threshold` | float | `0.0` | Minimum confidence for text blocks |
| `rotation_fix` | bool | `False` | Auto-detect and fix image rotation |
| `enhance_contrast` | bool | `False` | Enhance image contrast |
| `remove_noise` | bool | `False` | Apply noise reduction |
| `preserve_formatting` | bool | `True` | Preserve text layout and formatting |
| `psm` | int | `3` | Page segmentation mode (0-13) |
| `oem` | int | `3` | OCR Engine Mode (0-3) |
| `custom_config` | str | `''` | Additional Tesseract configuration string |

## Supported Languages

100+ languages including all major languages. Requires language packs to be installed separately.

## Installation Note

Tesseract must be installed on the system:

* Ubuntu/Debian: `sudo apt-get install tesseract-ocr`
* macOS: `brew install tesseract`
* Windows: Download installer from GitHub


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