How to Download and Install OpenCVSharp GPU DLL for .NET
OpenCVSharp is a popular .NET wrapper for OpenCV, the open source computer vision library. OpenCVSharp allows you to use OpenCV features such as image processing, face detection, object tracking, and machine learning in your .NET applications. However, to take advantage of the GPU acceleration that OpenCV offers, you need to download and install the OpenCVSharp GPU DLL file.
In this article, we will show you how to download and install OpenCVSharp GPU DLL for .NET on Windows and Ubuntu platforms. We will also provide some code examples to demonstrate how to use OpenCVSharp with GPU support.
Download OpenCVSharp GPU DLL for .NET
There are two ways to download OpenCVSharp GPU DLL for .NET: using NuGet packages or downloading DLL files manually.
Using NuGet Packages
The easiest way to download OpenCVSharp GPU DLL for .NET is to use NuGet packages. NuGet is a package manager for .NET that helps you manage dependencies and install libraries in your projects. You can use NuGet from Visual Studio, .NET CLI, or any other compatible tool.
To use NuGet packages, you need to add both OpenCvSharp4 and OpenCvSharp4.runtime.* packages to your project. The OpenCvSharp4 package contains the core managed libraries, while the OpenCvSharp4.runtime.* package contains the native bindings for your OS. Currently, there are native bindings for Windows, UWP, Ubuntu 20.04 x64, Linux Arm, and WebAssembly.
For example, if you want to use OpenCVSharp with GPU support on Windows x64 platform, you need to add the following packages:
You can find more information about the available NuGet packages on this page.
Downloading DLL Files Manually
If you do not use NuGet, you can also download the DLL files manually from the release page of the OpenCvSharp GitHub repository. You need to download both the OpenCvSharpExtern.dll file and the opencv_world*.dll file that matches your OpenCV version and platform.
For example, if you want to use OpenCV 4.7 with GPU support on Windows x64 platform, you need to download the following files:
opencv_world470d.dll (for debug mode)
You need to copy these files to your output directory or add them to your system path.
Install OpenCVSharp GPU DLL for .NET
After downloading the DLL files, you need to install them on your system. The installation process depends on your OS and platform.
Windows (except UWP)
If you are using Windows (except UWP), you need to install the Visual C++ 2022 Redistributable Package on your system. You can download it from this page.
If you are using Windows Server, you also need to enable the Media Foundation feature on your system. You can do this by running the following command in PowerShell:
If you are using UWP (Universal Windows Platform), you need to add a reference to the opencv_videoio_ffmpeg470_64.dll file in your project. This file is included in the OpenCvSharp4.runtime.uwp NuGet package or in the release page of the OpenCvSharp GitHub repository.