How does automatic PDF deskew correct crooked scanned documents?

The deskew algorithm performs Hough transform or Radon projection analysis to detect text baseline angles and applies an inverse rotation matrix to straighten skewed scans.

What range of skew angles can be automatically corrected?

Standard automatic deskew corrects tilt angles from -15° to +15°, straightening crooked scanner feeds and slanted mobile camera captures.

Does deskewing improve Optical Character Recognition (OCR) accuracy?

Yes. Straightening text baselines significantly improves OCR character recognition rates and line bounding box detection for automated data extraction.

Will deskewing add black border wedges around the straightened page?

The deskew engine crops or fills corner rotation gaps with clean white background pixels to match the surrounding page color.

Can I apply deskew to multi-page contracts and receipts simultaneously?

Yes. The engine evaluates each page independently, calculating and correcting the specific tilt angle on every sheet.

Deskew PDF Online · Auto-Straighten Scanned PDF Pages