Opencv With C#

Introduction to Opencv

OpenCV is an open source library that allows you to perform computer vision tasks on images or videos. With OpenCV, you can read and write images in a variety of formats, including PPM, PNG, JPEG, TIFF, and XBM. You can also use OpenCV to process video frames captured from a camera or webcam.

In this blog post, we’ll give you a brief introduction to OpenCV and show you how to use it with C#. We’ll also provide an example application that demonstrates some of the features of OpenCV.

What is OpenCV?

OpenCV (Open Source Computer Vision Library) is an open source computer vision and machine learning software library. OpenCV was built to provide a common infrastructure for computer vision applications and to accelerate the use of machine perception in the commercial products. Being a BSD-licensed product, OpenCV makes it easy for businesses to utilize and modify the code.

The library has more than 2500 optimized algorithms, which includes a comprehensive set of both classic and state-of-the-art computer vision and machine learning algorithms. These algorithms can be used to detect and recognize faces, identify objects, classify human actions in videos, track moving objects, etc. With all these features, OpenCV can be used in a wide variety of fields, from security and surveillance to medical image analysis, industrial automation, etc.

What is C#?

C# (pronounced “C-sharp”) is a programming language that enables developers to create various types of applications that run on the .NET Framework. C# is simple, powerful, type-safe, and object-oriented. The many features of C# enable you to develop software products with a wide range of functionality.

C# can be used to create Windows client applications, XML Web services, distributed components, client-server applications, database applications, and much, much more. In addition, C# is easy to learn for programmers who are familiar with C++ or Java.

How to use OpenCV with C#?

OpenCV is a powerful tool for image processing and computer vision, and can be used with a variety of programming languages. C# is a popular language for development on the Microsoft platform, and with the right tools it can be used for cross-platform development as well.

In this article we’ll show you how to get started with OpenCV in C#, including how to install the required tools and libraries, how to load and display images, and how to perform basic image processing tasks such as cropping, resizing, and thresholding. We’ll also briefly touch on some more advanced topics such as object detection and tracking.

An example of using Opencv with C#

OpenCV is a powerful tool for image processing. With it, you can do everything from basic image editing to more complex tasks like object detection and face recognition. And, best of all, it’s free!

In this blog post, we’ll show you how to use OpenCV in your C# applications. We’ll start with a simple example that shows how to load and display an image. Then we’ll move on to more advanced topics like object detection and face recognition.

So let’s get started!

How to install and use opencv with C#?

If you are a C# programmer, you can install and use opencv with C#. All you need is the opencv library and a few lines of code.

First, download the opencv library from Then, add the library to your project. In Visual Studio, this can be done by going to Project > Add Reference > Browse, and then selecting the opencv dll file.

Once the library is added to your project, you can access it using the following code:

using OpenCvSharp;

This will give you access to all the functions in the opencv library. For example, to read an image from a file:

using (var img = new Mat(“image.jpg”)) { // do something with the image }

Why use Opencv with C#?

Opencv is a powerful image processing and computer vision library that can be used to perform a wide variety of tasks. C# is a popular programming language that is known for its ease of use and flexibility. When used together, these two tools can provide an extremely powerful toolset for developers working on image processing and computer vision applications.

Some of the advantages of using Opencv with C# include:

  • Ease of use: The Opencv library is very user friendly and easy to use. This makes it ideal for beginners who are just getting started with image processing and computer vision. Additionally, the syntax of C# is very clean and easy to read, making it easier to understand code written in this language.
  • Flexibility: C# is a very flexible language, which allows developers to easily write code that is compatible with a wide range of platforms and devices. This means that applications developed using Opencv and C# can be easily deployed to a variety of different systems.
  • Performance: Opencv is a very efficient library, which means that applications written using this tool will run quickly and smoothly. This is particularly important for real-time applications such as video surveillance or object tracking.

    Overall, Opencv and C# provide an excellent toolset for developers working on image processing and computer vision applications. These two tools offer great ease of use, flexibility, and performance, making them ideal for a wide range of development needs.

Tips and Tricks

If you are a C# developer and you want to get into computer vision, then OpenCV is a great choice. This library is cross-platform and free to use. In this blog post, we will show you how to get started withOpenCV using Visual Studio and write your first C# program with OpenCV.

We will also provide an example program that uses OpenCV to detect faces in an image. By the end of this post, you should have a good understanding of how to install OpenCV and write simple computer vision programs in C#.

Installing OpenCV:

The first thing you need to do is install OpenCV. You can do this using the NuGet Package Manager in Visual Studio. To do this, go to Tools > NuGet Package Manager > Package Manager Console. Then type the following command:

Install-Package -Version 3.4.1

This will install the Emgu CV wrapper forOpenCV. Emgu CV is a .NET wrapper for the popular computer vision library. It makes it easy to use OpenCV in .NET applications.

Creating a New Project:

Once you have installed Emgu CV, create a new C# project in Visual Studio. You can call it whatever you like; we’ll just call it “OpenCVExample” for this example. Make sure that the target framework is set to .NET Framework 4 or higher;


In this article, we have discussed how to use OpenCV with C#. We also provided a working example that shows how to read an image and convert it into grayscale. In the next article, we will discuss how to use OpenCV with other languages such as Python and Java.