Features

• Added support for Microsoft .NET 7.
• Added 'IronSoftware.System.Drawing' to replace 'System.Drawing.Common' in IronOCR.
• Improved support for several Linux distributions.
• Improved 'OcrFilters.DeNoise': Now reduces speckle noise.
• Removed support for Microsoft .NET Framework 4. Minimum supported .NET Framework is now version 4.6.2.
• Removed internal dependency on 'System.Drawing.Common'.
• Added brand new OcrFilters to improve reading from noisy images:
  • Open: Filter that is useful for removing noise.
  • Close: Filter that is useful for closing small holes inside foreground objects.
  • AdaptiveThreshold: Applies a Bradley Adaptive Threshold to the image.

Features

• Improved platform compatibility and deployment.
• Added 'Installation.MachineLearningModelsDirectory' for specifying path to .onnx files.

Fixes

• Fixed 'missing runtimes folder' error.
• Fixed 'missing libtesseract' error.
• Minor bug fixes.

Features

• Use machine learning technology to detect regions which may contain text.
• Added 'OcrInput' methods 'FindTextRegion' and 'FindMultipleTextRegions'.
• Added 'OcrResult' method 'SaveAsSearchablePdfStream' for saving a result as a PDF stream.
• Updated Microsoft Windows build to require fewer dependencies and use less disk space.
• Updated image loading to always remove color tables from images before performing OCR, which improves accuracy.

Fixes

• Fixed GetCropRectangleImage to work properly with all source image formats.
• Fixed issue with Installation.LoggingMode and LogFilePath not applying properly.

Features

• Added new method for visualizing a crop rectangle on an image.
• Added new method for applying multiple filters at once.
• Changed Deskew filter to no longer throw an exception on failure.
• Improved compatibility with Microsoft Windows systems which may not have Microsoft C++ redistributables installed.
• Improved compatibility with Apple macOS systems (both Intel and Apple Silicon) which may be missing certain imaging libraries.

Features

• Updated Tesseract to version 5.1.
• Added support for Apple Silicon devices (Apple macOS on ARM processor).
• Added OcrInput.SaveAsImages() which allows you to save input items as an image.
• Added CropRectangle class which allows you to crop using millimeter values or pixel values.
• Removed MinimumDpi. Please use TargetDpi to upscale your OCR input.
• Setting TargetDpi to null now prevents IronOcr from upscaling images, resulting in much smaller searchable PDFs.
• Improved compatibility across various Linux distributions.

Fixes

• Fixed bug where Erosion filter applied Dilation and Dilation filter applied Erosion.
• Fixed bug where PDF pages were numbered incorrectly.

Features

• Added Microsoft .NET 6 support.
• Improved security and performance.

Features

• Feature: Added OCR Progress Tracking.
• Improved: Multithreading and performance.
• Improved: PDF OCR performance.
• Improved: Orientation and script detection (OSD).
• Improved: Deskew methods.
• Improved: Security and performance.