Geometric distortions is a very common case when dealing with photos of books, magazines, multi-page documents, and similar content. They can be caused by physical page curvature or camera lens distortion (ultra-wide and fisheye lenses, as well as entry-level smartphone lenses).
Warped images are very hard to be processed by most OCR algorithms. Thus, image straightening and distortion removal is critical to the recognition process as it directly affects the reliability and efficiency of segmentation and text extraction. Aspose.OCR Cloud has a preprocessing filter for automated correction of geometric image distortions.
- Straightening lines in curved pages.
- Fixing geometric distortions on ultra-wide or fisheye photos.