通过 IronOCR 的更新日志保持更新

发布说明

• Added full ICAO MRZ field extraction and best-effort VIZ Date of Issue detection to PassportInfo

• Fixed crash in SaveAsSearchablePdf when using Scale() or EnhanceResolution() during batch text rendering.

• Fixed System.Memory assembly version conflict (FileLoadException) affecting .NET Framework 4.8 customers

• 更新内部依赖项。

发布说明

• Fix ReadPhoto and ReadScreenShot crash when no text is detected
• 修复了在绘制文本操作中 Unicode 字符和非标准字体无法正确渲染的问题。
• 为可搜索PDF生成添加自定义字体支持，修复UTF-8字符渲染问题

• 修复不必要的 HOCR 生成和临时文件清理问题

• 更新内部依赖项。

发布说明

• 更新内部依赖项。

发布说明

• 更新内部依赖项。

发布说明

• Added SaveAsSearchablePdf() support for OcrPhotoResult and OcrDocAdvancedResult

• 修正了一个问题，即输入 Pdf 中的损坏字符会出现在输出的可搜索 Pdf 中
• Fixed an issue where SaveAsSearchablePdf() throws exception when applying Deskew() to OcrInput

• Fixed an issue where SaveAsSearchablePdf() throws exception when ApplyFilter was set to true

• 更新内部依赖项。

Scale()andEnhanceResolution()filters incompatible withSaveAsSearchablePdf()- all other 10 filters work correctly. (这将作为OCR-405登录）

发布说明

• 增加了对英文手写文本的支持

• 在生成 OCR 可搜索 PDF 时缩短处理时间。

• Fixed an issue where ASP.NET Web App .NET Framework (MVC/Web Forms) throws exception when using advanced scan methods.
• Fixed an issue where SaveAsSearchablePdf() throws 'Sequence contains no elements' exception

• Fixed an issue native reference files cannot be located in ASP.NET Web Forms Site (Legacy template)

• Combined IronOcr.Extensions.AdvancedScan to the main IronOcr package
• 更新内部依赖项。

发布说明

• 更新内部依赖关系。

发布说明

• Updates IronSoftware.System.Drawing to 2025.9.3.

• 优化 Tiff 图像输入的内存消耗。

发布说明

• Updates IronSoftware.System.Drawing to 2025.8.1.

• Fixes UseCustomTesseractLanguageFile cannot load file name with space.

• 修复生成可搜索 PDF 时文本流向不正确的问题。

• Introduces 4 OrientationDetectionMode inDetectPageOrientation(): Fast, Balanced, Detailed, ExtremeDetailed.

• Improves DetectPageOrientation() outputs.

发布说明

• Updates IronSoftware.System.Drawing to 2025.7.12.

• Fixes an issue where ReadPassport throwed an error of System.Index.OutOfRange for certain PDF inputs.

发布说明

• Updates IronSoftware.System.Drawing to 2025.6.2.

• 修复了加载 PDF 时的内存泄漏问题，该问题可能导致应用程序长期占用过多内存。
• Fixes SaveAsSearchablePdf() ignores page indices from LoadPdfPages().

• Fixes SaveAsSearchablePdf() returns output PDFs with copies of the first page content for certain input PDFs.

• 改进可搜索 PDF 文本层坐标，使其更符合输入内容。

• 显著改善 TIFF 页面加载和读取的延迟。

• Adds explanation on how Timeout works for ReadAsync method.

发布说明

更新：

• Updates IronSoftware.System.Drawing to version 2025.5.3.

特性：

• First release of IronOcr.Extensions.AdvancedScan for Linux and macOS.

错误修复：

• Fixes issue where SaveAsSearchablePdf() ignores page indices from LoadPdfPages().

增强功能：

• 在 OCR 之后生成可搜索 PDF 时减少处理时间。
• Adds options to generate searchable PDFs with or without OCR filters applied in the SaveAsSearchablePdf method.

重大变更：

• Deprecates IronOcr.ComputerVision package required to run FindTextRegion and FindMultipleTextRegions APIs. Now, IronOcr.Extensions.AdvancedScan is required instead.
• Changes FrameNumber property to PageNumber in the ReadPhoto method.

发布说明

更新

• Updates IronSoftware.System.Drawing to version 2025.3.6.

错误修复

Fixes error in SaveAsHtmlDocument() method caused by PdfDocEncoding type initializer exception related to obfuscation issue.

发布说明

• Updates IronSoftware.System.Drawing to 2025.3.5.
• 修复从图像输入生成的可搜索 PDF 的页面尺寸不正确的问题。

发布说明

增强功能：

Enhances the speed performance by 30% and optimized memory management by 40% for the Read and SaveAsSearchablePdf methods.

错误修复：

• 修正部署过程不尊重设置的安装路径的问题。
• 修复了读取和生成可搜索 PDF 的多文件类型的问题。

发布说明

增强功能：

• Improves reading speed when enabling RenderSearchablePdf and AutoRotateDetectionForRenderSearchablePdf.
• Improves an exception error message for an edge case issue in Read method.
• 更新依赖包，以解决已知的安全漏洞。
• 禁用内部日志信息。

错误修复：

• Fixes an issue where serializing OcrResult to JSON throws an exception.

发布说明

• Updates IronSoftware.System.Drawing Dependency to 2024.12.3

发布说明

• Updates IronSoftware.System.Drawing Dependency to 2024.9.15.
• 为大多数使用案例减少可搜索 PDF 的文件大小。
• 修复了可搜索 PDF 中尺寸不一致的问题。
• Adds a new Tesseract configuration, AutoRotateDetectionForRenderSearchablePdf, enabling users to disable automatic rotation and manually adjust the input file's orientation.

发布说明

• Improves ReadPassport for rotated input.
• Updates IronSoftware.System.Drawing Dependency to 2024.9.11

发布说明

• Adds a new reading method ReadDocumentAdvanced specialized for Table data read.
• Updates IronSoftware.System.Drawing Dependency to 2024.9.10

发布说明

• 修复阅读完成后临时文件未清理的问题
• Updates IronSoftware.System.Drawing Dependency to 2024.8.1

发布说明

• Fixes DetecPageOrientation only returned the result of the first page content.
• Fixes ConvertToSearchablePdf overload issue.
• 缩小 Tiff 输入文件的可搜索 PDF 输出文件大小。
• Updates IronSoftware.System.Drawing Dependency to 2024.7.2

发布说明

• 改进对扫描字符的控制：对高级扫描过程中捕获的字符获得更多控制。
• 增强文档扫描功能：高级扫描模式现在支持更多语言，包括中文、繁体中文、日文、韩文和拉丁文，让您可以扫描更多语言的文档。
• 修复了可搜索 PDF 返回重叠文本的问题：此更新解决了可搜索 PDF 中的文本在扫描后出现重叠的问题。
• 修复部署到 Azure 功能时的问题：此更新解决了将 IronOCR 部署到 Azure Functions 会导致错误的问题。
• Updates IronSoftware.System.Drawing Dependency to 2024.6.1

发布说明

• Introduces new Read methods, required separate installation of the IronOcr.Extension.AdvancedScan package.
• New advanced method: ReadPhoto() [See IronOcr.Extension.AdvancedScan NuGet package].
• New advanced method: ReadScreenshot() [See IronOcr.Extension.AdvancedScan NuGet package].
• New advanced method: ReadPassport() [See IronOcr.Extension.AdvancedScan NuGet package].
• New advanced method: ReadLicensePlate() [See IronOcr.Extension.AdvancedScan NuGet package].
• Updates IronSoftware.System.Drawing Dependency to 2024.5.1

发布说明

• 删除与 OCR 流程无关的公共日志。
• Updates IronSoftware.System.Drawing Dependency to 2024.4.1

发布说明

• Implement DetectPageOrientation to detect orientation of the input.
• 修正了一个错误，即在 .NET Framework 中无法从 web.config 文件中获取许可证密钥。
• Updates IronSoftware.System.Drawing Dependency to 2024.3.4

发布说明

• Overhauls all OcrInput methods to use Load instead of Add prefix. Please try .Load(), .LoadImage(), .LoadPdf()
• 在大型 PDF 输入上下文中，整体速度最多可提高 90%，使用的分配和实时对象最多可减少 80
• Improved memory management for bitmaps in IronCV contexts
• Moved SearchablePdf to its own flag. See Configuration.RenderSearchablePdf which is on by default
• 删除了默认标志中的 hOCR 输出。 Use Configuration.RenderhOCR = true to explicitly use
• Updates IronSoftware.System.Drawing Dependency to 2024.2.2

发布说明

• Updates IronSoftware.System.Drawing to v2024.4.1
• 修复输出可搜索 PDF 中忽略旋转的问题
• 将输出可搜索 PDF 的尺寸固定为相对于输入图像的尺寸
• 修复 16 BPP bmp 导出为空白可搜索 PDF 的问题

发布说明

• Updates IronSoftware.System.Drawing to v2023.12.1

发布说明

• 保存可搜索 PDF 现在可正确输出原始图像尺寸，而不是 A4 尺寸
• 解决了预旋转 PDF 文档保存为正方形输出的问题 可搜索 PDF
• OcrResult.Barcode's Position data now based on original image instead of relative to Crop Region
• Support for UTF-8 Encodings for OcrResult.SaveAsTextFile
• StampCropRectangle can now accept a list of rectangles to stamp
• StampCropRectangle has a static overload that returns the stamped OcrInput for further processing

发布说明

• Updated IronSoftware.System.Drawing to version 2023.10.1.
• Updated IronSoftware.Common to version 2023.10.2.

发布说明

• 修复安装多个Iron Software产品时导致崩溃的bug
• Added IronSoftware.Common as a new dependency
• Updated IronSoftware.System.Drawing to version 2023.9.2
• Updated IronSoftware.Native.PdfModelto version 2023.9.18570

发布说明

• Searchable PDFs now retain bookmarks, annotations, page orientation, etc. (use OcrPdfInput)
• Searchable PDFs now require less disk space
• Added OcrPdfInput class for streamlined OCR of PDF documents
• Added OcrImageInput class for streamlined OCR of images
• Deprecated OcrInput class, although it will still be available for the foreseeable future
• Fixes stamping of crop rectangles not displaying properly

发布说明

• Added EnableTesseractWarnings set to false by default, to suppress Tesseract warnings in the console
• Using IronSoftware.Native.PdfModel to read and write PDF
• Updates IronSoftware.System.Drawing to 2023.7.1

发布说明

• PostBuildEvent Runtime Folder Copy Fix: Resolved an issue related to copying the runtime folder during PostBuildEvent
• Updates IronSoftware.System.Drawing to 2023.6.1

发布说明

• Fixes an issue where license keys would not be retrieved from web.config in some .NET Framework ASP.NET projects
• Updates IronSoftware.System.Drawing to 2023.4.4

发布说明

• Updates IronSoftware.System.Drawing to 2023.3.3
• Includes new ReadPdfAndOverlayText method on IronTesseract to add text and preserve original PDF bookmarks/annotations
• Resolves an issue causing Searchable PDFs with many images to becomes large files
• Fixes an issue where the Binarize filter made Searchable PDFs blank
• Fixes issue where the Read method would create temp files and not clean them up
• 添加对 Iron Suite 许可证密钥的支持
• Fixes issues with license keys stored in .config and .json files not being picked up by IronOCR
• 增加了对存储在应用程序子文件夹中 .config 和 .json 文件中的许可证密钥的支持

发布说明

• Adds compatibility for AWS (Amazon Linux)
• Adds compatibility for various older Linux distributions
• Improves reliability when reading text from PDFs
• Improves speed and fidelity when creating searchable PDFs
• Improves logic for finding language files
• Removes dependency on System.Drawing

发布说明

• Adds Installation.LanguagePackDirectory for specifying path to .ocrdata files
• Fixes IronOcr for use with ClickOnce publishing and 'dotnet publish' command
• Fixes some instances where language packs would fail to load
• Fixes crop rectangle being ignored when reading from TIFF images
• Fixes trial users not being able to read text from images
• Allows single-threaded OCR reads (see IronTesseract.Multithreaded)

发布说明

• Adds IronSoftware.System.Drawing to replace System.Drawing.Common in IronOCR
• Removes internal dependency on System.Drawing.Common (see footnote [1] for more info)
• 增加了对 .NET 7 的支持
• Removes support for .NET Framework 4. Minimum supported for .NET Framework is now version 4.6.2
• Improves support for many Linux Distros
• Improves OcrFilters.DeNoise: Now reduces speckle noise.
• Adds 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.

  [1] 关于移除System.Drawing.Common的说明：

  - Microsoft has discontinued support for System.Drawing.Common on non-Windows for .NET 6, and completely for .NET 7 : https://docs.microsoft.com/en-us/dotnet/core/compatibility/core-libraries/6.0/system-drawing-common-windows-only
• In order to handle this, we have developed an open-source library called IronSoftware.System.Drawing which easily translates between all the common types and formats that System.Drawing.Common did which will replace it
• Customers who still want to use System.Drawing.Common with IronOCR will still be able to. IronSoftware.System.Drawing will work with this format but since System.Drawing.Common is no longer a dependency, usage will require the customer to add a using System.Drawing.Common; call in their code.