docs/preprocessing_triage.md

OCR Preprocessing Triage

Quick Fixes Implemented

1. Handwritten - Disabled thresholding, uses grayscale only
2. Newspapers - Increased block size (51) and constant (10) for softer thresholding
3. JPEG Artifacts - Auto-detection and specialized denoising
4. Border Issues - Crops edges after deskew to avoid threshold problems
5. Low Resolution - Upscales small text for better recognition

Testing

python testing/test_triage_fix.py

Check output/comparison/ for results.