Fixed an issue where page orientation detection could incorrectly identify an upright page as rotated when small vertical text, such as captions, outweighed larger body text. Confidence reporting now better indicates whether the detected orientation is reliable.
Fixed an issue where copied text from searchable PDFs could place each word on a separate line or merge adjacent words in some PDF viewers. Copied text now preserves normal word spacing and line structure.
Fixed an issue where ReadDocumentAdvanced could throw an exception while detecting tables in some multi-page scanned PDFs that contain no tables.
IronOCR for .NET 2026.10.42026年10月12日
修正
Updated IronSoftware.System.Drawing to 2026.11.3 to resolve CVEs CVE-2026-106110 through CVE-2026-106116 via SixLabors.ImageSharp 4.1.3 on .NET 8+. Earlier .NET frameworks remain unaffected by this fix.
IronOCR for .NET 2026.10.22026年9月30日
功能
Updated internal dependencies.
修正
Fixed an issue where 'OcrInput.LoadPdfPages' could take significantly longer than expected when loading selected pages from large PDFs.
Fixed an issue where 'OcrResult.EngineModeUsed' could incorrectly report 'TesseractOnly' instead of the actual engine mode used.
Fixed an issue where 'DeNoise' could leave residual background speckle on scans with textured backgrounds.
IronOCR for .NET 2026.9.42026年9月1日
功能
Updated internal dependencies.
修正
Fixed an issue where 'DetectPageOrientation' in 'ExtremeDetailed' mode could throw on blank or low-text pages instead of returning a result.
IronOCR for .NET 2026.8.12026年8月3日
功能
Updated internal dependencies.
修正
Fixed stability issues when OCR-ing large volumes of PDFs in parallel, and added controls to limit OCR memory usage.
Fixed loading of large TIFF files and improved error messages for unsupported TIFF images.
IronOCR for .NET 2026.7.22026年6月26日
功能
Updated Android native libraries to support 16 KB memory page sizes, ensuring compatibility with Android 15 and newer devices.
Updated internal dependencies.
修正
Fixed a PDF/A compliance issue affecting searchable PDFs containing complex-script fonts such as Arabic.
IronOCR for .NET 2026.6.12026年5月26日
功能
Improved searchable PDF OCR alignment for numeric content with refined digit width compensation and font sizing accuracy.
Updated internal dependencies.
IronOCR for .NET 2026.5.22026年4月29日
功能
Added word-level coordinates to OcrDocAdvancedResult for improved reading order reconstruction.
Updated internal dependencies.
修正
Fixed ReadHandwriting() crash on skewed or difficult inputs; now returns an empty result when no text can be extracted.
Corrected bounding box coordinates in ReadPhoto() and ReadScreenShot() when AdvancedScan resizes images, preventing out-of-bounds regions and crop/PDF errors.
Fixed an issue where TIFF images with orientation tags were incorrectly flipped or rotated during loading, saving, or bitmap conversion.
IronOCR for .NET 2026.4.12026年3月27日
功能
Added full International Civil Aviation Organization (ICAO) MRZ field extraction and best-effort VIZ Date of Issue detection to 'PassportInfo'.
Updated internal dependencies.
修正
Fixed crash in 'SaveAsSearchablePdf' when using Scale() or EnhanceResolution() during batch text rendering.