TRex v1.9.1-BETA-1 Release Notes

🐛 Bug Fixes

Czech Language OCR Fix

• Fixed language code normalization: Resolved issues with Czech (and potentially other) language recognition where language codes with underscores (cs_CZ) weren't being properly converted to the hyphen format (cs-CZ) required by Apple Vision OCR
• Fixed engine selection: Corrected issue where Tesseract engine was being selected even when disabled in preferences, causing fallback to incorrect engines with poor results
• Language identifier handling: Improved LanguageCodeMapper.standardize() to properly handle locale-based language codes

Image Preprocessing

• Enhanced text recognition accuracy: Added automatic image preprocessing with:
  • +30% contrast enhancement
  • +10% brightness adjustment
  • +10% saturation boost
• These improvements help recognize low-contrast and light-colored text more reliably

OCR Engine Management

• Better engine routing: Made OCRManager.engines publicly readable to allow proper engine filtering based on user preferences
• Explicit Vision engine selection: Ensures Apple Vision is used when Tesseract is disabled

🔧 Improvements

Developer Experience

• Enhanced logging: Added comprehensive debug logging throughout the OCR pipeline, including:
  • Language selection decisions
  • Engine routing information
  • Recognition results with confidence scores
  • Alternate recognition candidates for debugging

Code Quality

• Removed unnecessary entitlements: Cleaned up app entitlements file by removing unneeded permissions

📝 Technical Details

This release primarily addresses language recognition issues that could affect users working with Czech and potentially other languages where locale-based language codes (containing underscores or region identifiers) weren't being properly standardized for the Vision framework.