Table of Contents

Introduction to OpenCvSharp

OpenCvSharp is a .NET wrapper for OpenCV, one of the most popular open-source computer vision libraries.

What is OpenCvSharp?

OpenCvSharp provides cross-platform .NET bindings for OpenCV, allowing you to use OpenCV's powerful computer vision and image processing capabilities in your .NET applications.

Supported Platforms

  • Windows: x64, x86, UWP
  • Linux: Ubuntu 22.04, 24.04, ARM
  • macOS: x64
  • WebAssembly: Browser-based applications

Getting Started

Installation

Install OpenCvSharp via NuGet Package Manager:

# Core library
dotnet add package OpenCvSharp4

# Native bindings (choose one based on your platform)
dotnet add package OpenCvSharp4.runtime.win                      # Windows
+# dotnet add package OpenCvSharp4.runtime.win.slim                # Windows slim
dotnet add package OpenCvSharp4.official.runtime.ubuntu.24.04-x64         # Ubuntu 24.04
# dotnet add package OpenCvSharp4.official.runtime.ubuntu.24.04-x64.slim # Ubuntu 24.04 slim

Quick Example

using OpenCvSharp;

// Load an image
using var src = Cv2.ImRead("sample.jpg");

// Convert to grayscale
using var gray = new Mat();
Cv2.CvtColor(src, gray, ColorConversionCodes.BGR2GRAY);

// Apply Gaussian blur
using var blurred = new Mat();
Cv2.GaussianBlur(gray, blurred, new Size(5, 5), 0);

// Save the result
Cv2.ImWrite("output.jpg", blurred);

Next Steps

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