OpenCV5Sharp.Mobile 1.0.10

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher. 
dotnet add package OpenCV5Sharp.Mobile --version 1.0.10
                    


                    

                
NuGet\Install-Package OpenCV5Sharp.Mobile -Version 1.0.10
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="OpenCV5Sharp.Mobile" Version="1.0.10" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="OpenCV5Sharp.Mobile" Version="1.0.10" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="OpenCV5Sharp.Mobile" />
                    


                            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 OpenCV5Sharp.Mobile --version 1.0.10
                    


                    

                
#r "nuget: OpenCV5Sharp.Mobile, 1.0.10"
#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 OpenCV5Sharp.Mobile@1.0.10
#: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=OpenCV5Sharp.Mobile&version=1.0.10
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=OpenCV5Sharp.Mobile&version=1.0.10
                    


                            Install as a Cake Tool

OpenCV5Sharp Library

Published by Qourex

Clean, automatic C# wrapper for OpenCV 5.0.0 with complete API coverage and robust unmanaged memory management.

Nuget NuGet Downloads License Platform

Installation

dotnet add package OpenCV5Sharp

Or via the NuGet Package Manager Console:

Install-Package OpenCV5Sharp

Key Features

  • OpenCV 5.0.0 Alignment: Matches the restructured OpenCV 5 API layout (Features module, new Stereo/Calib split, and DNN).
  • Auto-Generated Complete API: Over 2,600 methods from core, imgproc, videoio, highgui, features2d, calib3d, objdetect, photo, and dnn modules.
  • Thread-Safe Unmanaged Memory: Uses a specialized, atomic Interlocked.Exchange-based DisposableOpenCVObject base class to prevent double-free conditions and memory leaks.
  • Exceptions Boundary Protection: Zero raw native crashes. Every single C++ entry point is wrapped in standard try/catch handlers that map exceptions back to managed OpenCVException objects.
  • Zero-Configuration Bundling: Prebuilt opencv_world500.dll, opencv_videoio_ffmpeg500_64.dll, and opencv5sharp_native.dll are bundled and copied automatically to the build output.

Supported Platforms

  • Operating System: Windows (x64), Linux (x64), macOS (x64, ARM64), Android (ARM64), iOS (ARM64)
  • Frameworks: .NET 8.0, .NET 9.0, .NET 10.0

Quick Start Example

using System;
using OpenCV5Sharp;

class Program
{
    static void Main()
    {
        // 1. Read input image (BGR color)
        using (Mat src = Cv2.Imread("input.jpg", (int)ImreadModes.Color))
        using (Mat gray = new Mat())
        using (Mat blurred = new Mat())
        using (Mat edges = new Mat())
        {
            if (src == null || src.Handle == IntPtr.Zero)
            {
                Console.WriteLine("Error: Could not load image.");
                return;
            }

            // 2. Convert to Grayscale
            Cv2.CvtColor(src, gray, (int)ColorConversionCodes.Bgr2gray, 0, AlgorithmHint.Default);

            // 3. Apply a 5x5 Gaussian Blur
            Cv2.GaussianBlur(gray, blurred, new Size(5, 5), 1.5, 1.5, (int)BorderTypes.Default, AlgorithmHint.Default);

            // 4. Perform Canny Edge Detection
            Cv2.Canny(blurred, edges, 50, 150, 3, false);

            // 5. Write the processed image back to disk
            Cv2.Imwrite("output_edges.jpg", edges, IntPtr.Zero);
        } // All unmanaged memory is automatically freed here
    }
}

Type Conversion Guide

OpenCV C++ Type OpenCV5Sharp Managed Type Marshaling Details
cv::Mat OpenCV5Sharp.Mat Wrapped IntPtr to unmanaged C++ instance
cv::Size_<int> OpenCV5Sharp.Size Sequential layout struct
cv::Point_<int> OpenCV5Sharp.Point Sequential layout struct
cv::Rect_<int> OpenCV5Sharp.Rect Sequential layout struct
cv::Scalar_<double> OpenCV5Sharp.Scalar Sequential layout struct
cv::Range OpenCV5Sharp.Range Sequential layout struct
cv::TermCriteria OpenCV5Sharp.TermCriteria Sequential layout struct
cv::String / std::string System.String UTF-8 marshaled string

Error Handling

All C++ exceptions (including OpenCV's native cv::Exception) are caught on the native side and converted into thread-local error states. When a wrapper call fails:

  1. The native function returns a failure status.
  2. The managed side detects the failure and fetches the error details.
  3. An OpenCVException is thrown containing the native stack trace and error code.

Example:

try
{
    using (Mat src = new Mat()) // Empty image
    using (Mat dst = new Mat())
        {
            Cv2.CvtColor(src, dst, (int)ColorConversionCodes.Bgr2gray, 0, AlgorithmHint.Default);
        }
}
catch (OpenCVException ex)
{
    Console.WriteLine($"OpenCV Error: {ex.Message} (Code: {ex.ErrorCode})");
}

Memory Ownership and Thread Safety

  1. Explicit Disposal: Any object inheriting from DisposableOpenCVObject (e.g. Mat, VideoCapture, CLAHE) allocates unmanaged resources. You must dispose them when done, preferably using C# using blocks.
  2. Double-Free Prevention: Calling Dispose() multiple times, or having Dispose() race with the Garbage Collector Finalizer, is thread-safe and handled atomically.
  3. Thread Safety: P/Invoke calls are thread-safe and re-entrant. However, mutating a single Mat instance from multiple threads simultaneously is not synchronized by the library; you must manage instance-level synchronization in user code.

Support & Contact

License

  • Library Code: Licensed under the Apache License, Version 2.0.
  • FFmpeg Integration: Dynamically links to FFmpeg binaries which are licensed under the GNU LGPL v2.1 or later.
  • Trademark Notice: "OpenCV" is a registered trademark of the OpenCV Foundation. This project is a separate community wrapper and is not endorsed by or affiliated with the OpenCV Foundation.

<p align="center">Built with ❤️ by <a href="https://qourex.com">Qourex</a></p>

Product Compatible and additional computed target framework versions.
.NET net8.0 is compatible.  net8.0-android is compatible.  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 is compatible.  net9.0-android is compatible.  net9.0-browser was computed.  net9.0-ios is compatible.  net9.0-maccatalyst is compatible.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android is compatible.  net10.0-browser was computed.  net10.0-ios is compatible.  net10.0-maccatalyst is compatible.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.0.10 47 7/2/2026

See CHANGELOG.md for release notes.