GUIDE深度 · Deep dive
Improving OCR Accuracy
OCR accuracy depends mainly on scan quality: 300dpi, deskew, contrast and cropping; match the language model (Chinese/English/mixed). Split tables/columns and verify numbers/IDs. No OCR is 100% accurate, so keep the original PDF and a proofreading record for any text you plan to publish or import.
300dpi/deskew/enhance.
Crop black edges/shadows.
Proofread by language.
Validate numbers/amounts with rules.
FAQ
Why is Chinese OCR poor?
chi_sim not selected/vertical text/stylized fonts; switch models/raise resolution.
Can it be 100% accurate?
No; key fields must be proofread.