OpenCvSharp4 4.13.0.20260302

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. 
dotnet add package OpenCvSharp4 --version 4.13.0.20260302
                    


                    

                
NuGet\Install-Package OpenCvSharp4 -Version 4.13.0.20260302
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="OpenCvSharp4" Version="4.13.0.20260302" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="OpenCvSharp4" Version="4.13.0.20260302" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="OpenCvSharp4" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add OpenCvSharp4 --version 4.13.0.20260302
                    


                    

                
#r "nuget: OpenCvSharp4, 4.13.0.20260302"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package OpenCvSharp4@4.13.0.20260302
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=OpenCvSharp4&version=4.13.0.20260302
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=OpenCvSharp4&version=4.13.0.20260302
                    


                            Install as a Cake Tool

OpenCvSharp

A cross-platform .NET wrapper for OpenCV, providing image processing and computer vision functionality.

Supported Platforms

Platform Target Framework
.NET 8.0 or later net8.0
.NET Standard 2.1 netstandard2.1
.NET Standard 2.0 netstandard2.0
.NET Framework 4.6.1+ via netstandard2.0
.NET Framework 4.8 direct target (WpfExtensions only)

Target OpenCV version: 4.13.0 (with opencv_contrib)

Quick Start

Windows

dotnet add package OpenCvSharp4.Windows

Linux / Ubuntu

dotnet add package OpenCvSharp4
dotnet add package OpenCvSharp4.official.runtime.linux-x64

For more installation options, see Installation on GitHub.

Requirements

Windows

Linux (Ubuntu and other distributions)

Pre-install the dependency packages needed for OpenCV. Many packages such as libjpeg must be present for OpenCV to work.
See: OpenCV Linux install guide

Slim Profile

The slim runtime packages (OpenCvSharp4.Windows.Slim, OpenCvSharp4.official.runtime.linux-x64.slim, etc.) bundle a smaller native library:

Modules
Enabled core, imgproc, imgcodecs, calib3d, features2d, flann, objdetect, photo
Disabled contrib, dnn, ml, video, videoio, highgui, stitching, barcode

Usage

Always release Mat and other IDisposable resources using the using statement:

using OpenCvSharp;

// Edge detection using Canny algorithm
using var src = new Mat("lenna.png", ImreadModes.Grayscale);
using var dst = new Mat();

Cv2.Canny(src, dst, 50, 200);
using (new Window("src image", src))
using (new Window("dst image", dst))
{
    Cv2.WaitKey();
}

For complex pipelines, use ResourcesTracker to manage multiple resources automatically:

using var t = new ResourcesTracker();

var src = t.T(new Mat("lenna.png", ImreadModes.Grayscale));
var dst = t.NewMat();
Cv2.Canny(src, dst, 50, 200);
var blurred = t.T(dst.Blur(new Size(3, 3)));
t.T(new Window("src image", src));
t.T(new Window("dst image", blurred));
Cv2.WaitKey();

Note: OpenCvSharp does not support Unity, Xamarin, CUDA or UWP.

Resources

Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 is compatible.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (163)

Showing the top 5 NuGet packages that depend on OpenCvSharp4:

Package Downloads
OpenCvSharp4.Extensions

OpenCvSharp GDI+ extension library.
OpenCvSharp4.Windows

OpenCV 4.x wrapper. All-in-one package for Windows users.
OpenCvSharp4.WpfExtensions

OpenCvSharp WPF extension library.
VL.OpenCV

OpenCV for VL
VisioForge.DotNet.Core.CV

VisioForge CV

GitHub repositories (40)

Showing the top 20 popular GitHub repositories that depend on OpenCvSharp4:

Repository Stars
ldqk/Masuit.Tools
全龄段友好的C#万能工具库，码数吐司库，包含一些常用的操作类，大都是静态类，加密解密，反射操作，权重随机筛选算法，分布式短id，表达式树，linq扩展，文件压缩，多线程下载，硬件信息，字符串扩展方法，日期时间扩展操作，中国农历，大文件拷贝，图像裁剪，验证码，断点续传，集合扩展、Excel导出等常用封装。诸多功能集一身，代码量不到2MB！
ramjke/Translumo
Advanced real-time screen translator for games, hardcoded subtitles in videos, static text and etc.
micjahn/ZXing.Net
.Net port of the original java-based barcode reader and generator library zxing
microsoft/Generative-AI-for-beginners-dotnet
Five lessons, learn how to really apply AI to your .NET Applications
takuya-takeuchi/FaceRecognitionDotNet
The world's simplest facial recognition api for .NET on Windows, MacOS and Linux
sdcb/PaddleSharp
.NET/C# binding for Baidu paddle inference library and PaddleOCR
b-editor/beutl
Cross-platform video editing (compositing) software.
dnobori/DN_SuperBook_PDF_Converter
DN_SuperBook_PDF_Converter - スキャン書籍 PDF をデジタル書籍並みに大変クリアに読みやすくする AI PDF 高品質化・各種調整ツール
zhuxb711/RX-Explorer
一款优雅的UWP文件管理器 | An elegant UWP Explorer
dorisoy/Dorisoy.Pan
Dorisoy.Pan 是基于 .NET 10 的跨平台文档管理系统，使用 MS SQL 2012 / MySQL 8.0（或更高版本）后端数据库，您可以在 Windows、Linux 或 Mac 上运行它。项目中的所有方法都是异步的，支持 JWT 令牌身份验证，项目体系结构遵循 CQRS + MediatR 模式和最佳安全实践。源代码完全可定制，热插拔且清晰的体系结构，使开发定制功能和遵循任何业务需求变得容易。
Keboo/MaterialDesignInXaml.Examples
A collection of small samples using MaterialDesignInXaml.
shimat/opencvsharp_samples
babalae/genshin-fishing-toy
🐟 原神自动钓鱼机，有界面且操作简单。Genshin Impact Automatic Fishing Machine.
Kinovea/Kinovea
Video solution for sport analysis. Capture, inspect, compare, annotate and measure technical performances.
sdcb/OpenVINO.NET
High quality .NET wrapper for OpenVINO™ toolkit.
ksasao/Gochiusearch
A Fast Scene Search Engine for Anime Series 'Gochuumon wa Usagi Desuka?'
fmbot-discord/fmbot
.fmbot is a social Discord bot that provides music statistics for you and your friends.
guojin-yan/YoloDeployCsharp
Deploying Yolov8-det, Yolov8-pose, Yolov8-cls, and Yolov8-seg models based on C # programming language.
shuyu-labs/Windows-MCP.Net
A .NET-based Windows desktop automation MCP (Model Context Protocol) server that provides AI assistants with the ability to interact with the Windows desktop environment.
microsoft/Microsoft-Rocket-Video-Analytics-Platform
A highly extensible software stack to empower everyone to build practical real-world live video analytics applications for object detection and counting with cutting edge machine learning algorithms.
Version Downloads Last Updated
4.13.0.20260302 0 3/2/2026
4.13.0.20260228 614 2/28/2026
4.13.0.20260226 1,452 2/26/2026
4.13.0.20260225 1,034 2/25/2026
4.13.0.20260222 3,228 2/22/2026
4.13.0.20260214 9,017 2/14/2026
4.13.0.20260213 1,206 2/13/2026
4.13.0.20260211 2,486 2/11/2026
4.11.0.20250507 573,517 5/7/2025
4.11.0.20250506 6,272 5/6/2025
4.10.0.20241108 690,022 11/8/2024
4.10.0.20241107 10,502 11/7/2024
4.10.0.20240616 457,711 6/16/2024
4.10.0.20240615 14,663 6/15/2024
4.9.0.20240103 1,659,254 1/3/2024
4.8.0.20230708 721,872 7/10/2023
4.7.0.20230115 676,265 1/15/2023
4.6.0.20220608 470,532 6/8/2022
4.5.5.20211231 380,256 12/31/2021
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