What is PDF Redaction?

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PDF Redaction

PDF Content Redaction

The permanent removal of sensitive text or images from a PDF, replacing content with black boxes and removing underlying data.

技术细节

PDF Redaction works by analyzing pixel patterns in scanned or photographed text. Modern OCR engines like Tesseract use neural networks (LSTM architectures) trained on millions of character samples across hundreds of languages. The process involves binarization, skew correction, line segmentation, word segmentation, and character classification. Post-processing with language models and dictionaries improves accuracy beyond raw character recognition, typically achieving 95-99% accuracy on clean printed text.

示例

```javascript
// PDF Redaction: PDF manipulation example
import { PDFDocument } from 'pdf-lib';

const pdfDoc = await PDFDocument.load(fileBytes);
const pages = pdfDoc.getPages();
console.log(`Pages: ${pages.length}`);
```

Categories

PDF Redaction

技术细节

示例

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