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

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