Software⏱️ 2 min read📅 2026-05-30

How to Fix: PaddleOCR vs EasyOCR: Text loss and watermark issues when processing complex PDFs in Python

PaddleOCR and EasyOCR text loss and watermark issues in complex PDFs

Quick Answer: Consider using the 'preprocess' function from PaddleOCR to remove watermarks before extracting text, or explore other OCR libraries like Tesseract-OCR that offer more advanced features for handling complex documents.

To effectively address the issue of text loss and watermark issues when processing complex PDFs in Python, it is essential to first understand the root causes of these problems.

🛑 Root Causes of the Error

  • PaddleOCR's default settings may not be optimized for handling complex PDFs with watermarks.
  • The libraries' lack of built-in support for handling scanned sections and signatures can lead to text loss.

🔧 Proven Troubleshooting Steps

Method 1: Preprocessing with OCR-friendly PDF tools

  1. Step 1: Use a library like PyMuPDF or pdfplumber to preprocess the PDF, converting scanned sections into editable text and removing watermarks.

Method 2: Customizing PaddleOCR's settings for optimal performance

  1. Step 1: Adjust PaddleOCR's settings, such as increasing the OCR engine threshold or using a custom layout analysis model, to better handle complex PDFs with watermarks.

🎯 Final Words

By following these steps and understanding the root causes of the issue, you can effectively address text loss and watermark issues when processing complex PDFs in Python.

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