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13 best C# Computer Vision libraries in 2025

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by naveen.kumar@openweaver.com dot icon Updated: Mar 12, 2024

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Computer vision is a discipline within computer science that focuses on how computers can gain an understanding of the visual world. Typically, this involves capturing image data from a camera and using specialized algorithms to extract information about objects, locations, and people involved in an image. This can range from detecting whether a face is smiling or frowning to identifying what kind of car is parked in front of a building. Computer vision has applications in many fields including medicine, entertainment, law enforcement, and more—and C# is one of the most popular programming languages used for computer vision. Some of the most popular among developers are: Opencvsharp - Provides functions for converting from Mat into Bitmap(GDI+) or WriteableBitmap(WPF); OptiKey - An on-screen keyboard that is designed to help Motor Neuron Disease (MND) patients interact with Windows computers; OpenCV - ComputerVision Demos. The entire list of open source C# Computer Vision libraries are provided below.

frameworkby accord-net

C# doticonstar image 4359 doticonVersion:v3.8.0doticon
License: Weak Copyleft (LGPL-2.1)

Machine learning, computer vision, statistics and general scientific computing for .NET

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            frameworkby accord-net

            C# doticon star image 4359 doticonVersion:v3.8.0doticon License: Weak Copyleft (LGPL-2.1)

            Machine learning, computer vision, statistics and general scientific computing for .NET
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                      OptiKeyby OptiKey

                      C# doticonstar image 4169 doticonVersion:v3.2.5_prerelease-4doticon
                      License: Strong Copyleft (GPL-3.0)

                      OptiKey - Full computer control and speech with your eyes

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                                OptiKeyby OptiKey

                                C# doticon star image 4169 doticonVersion:v3.2.5_prerelease-4doticon License: Strong Copyleft (GPL-3.0)

                                OptiKey - Full computer control and speech with your eyes
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                                          opencvsharpby shimat

                                          C# doticonstar image 4597 doticonVersion:4.7.0.20230114doticon
                                          License: Permissive (Apache-2.0)

                                          OpenCV wrapper for .NET

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                                                    opencvsharpby shimat

                                                    C# doticon star image 4597 doticonVersion:4.7.0.20230114doticon License: Permissive (Apache-2.0)

                                                    OpenCV wrapper for .NET
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                                                              AForge.NETby andrewkirillov

                                                              C# doticonstar image 977 doticonVersion:Currentdoticon
                                                              License: Others (Non-SPDX)

                                                              AForge.NET Framework is a C# framework designed for developers and researchers in the fields of Computer Vision and Artificial Intelligence - image processing, neural networks, genetic algorithms, machine learning, robotics, etc.

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                                                                        AForge.NETby andrewkirillov

                                                                        C# doticon star image 977 doticonVersion:Currentdoticon License: Others (Non-SPDX)

                                                                        AForge.NET Framework is a C# framework designed for developers and researchers in the fields of Computer Vision and Artificial Intelligence - image processing, neural networks, genetic algorithms, machine learning, robotics, etc.
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                                                                                  accord-net-extensionsby dajuric

                                                                                  C# doticonstar image 328 doticonVersion:v2.0.1doticon
                                                                                  no licences License: No License (null)

                                                                                  Advanced image processing and computer vision algorithms made as fluent extensions and built for portability

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                                                                                            accord-net-extensionsby dajuric

                                                                                            C# doticon star image 328 doticonVersion:v2.0.1doticonno licences License: No License

                                                                                            Advanced image processing and computer vision algorithms made as fluent extensions and built for portability
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                                                                                                      OpenCVby brakmic

                                                                                                      C# doticonstar image 246 doticonVersion:Currentdoticon
                                                                                                      License: Permissive (MIT)

                                                                                                      :camera: Computer-Vision Demos

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                                                                                                                OpenCVby brakmic

                                                                                                                C# doticon star image 246 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                :camera: Computer-Vision Demos
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                                                                                                                          Cognitive-Vision-Windowsby microsoft

                                                                                                                          C# doticonstar image 156 doticonVersion:Currentdoticon
                                                                                                                          License: Others (Non-SPDX)

                                                                                                                          Windows SDK for the Microsoft Computer Vision API, part of Cognitive Services

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                                                                                                                                    Cognitive-Vision-Windowsby microsoft

                                                                                                                                    C# doticon star image 156 doticonVersion:Currentdoticon License: Others (Non-SPDX)

                                                                                                                                    Windows SDK for the Microsoft Computer Vision API, part of Cognitive Services
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                                                                                                                                              kwyjiboby liabru

                                                                                                                                              C# doticonstar image 40 doticonVersion:Currentdoticon
                                                                                                                                              License: Permissive (MIT)

                                                                                                                                              a real-time OCR, computer vision and machine learning experiment

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                                                                                                                                                        kwyjiboby liabru

                                                                                                                                                        C# doticon star image 40 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                        a real-time OCR, computer vision and machine learning experiment
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                                                                                                                                                                  Unity-ComputerVisionSimby immersive-limit

                                                                                                                                                                  C# doticonstar image 29 doticonVersion:Currentdoticon
                                                                                                                                                                  License: Permissive (MIT)

                                                                                                                                                                  Computer Vision Simulation in Unity

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                                                                                                                                                                            Unity-ComputerVisionSimby immersive-limit

                                                                                                                                                                            C# doticon star image 29 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                                            Computer Vision Simulation in Unity
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                                                                                                                                                                                      TrafficComputerVisionby anthony-mestdach

                                                                                                                                                                                      C# doticonstar image 9 doticonVersion:Currentdoticon
                                                                                                                                                                                      no licences License: No License (null)

                                                                                                                                                                                      Computer Vision for Driver Assistance Systems with Emgu CV

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                                                                                                                                                                                                TrafficComputerVisionby anthony-mestdach

                                                                                                                                                                                                C# doticon star image 9 doticonVersion:Currentdoticonno licences License: No License

                                                                                                                                                                                                Computer Vision for Driver Assistance Systems with Emgu CV
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                                                                                                                                                                                                          memespector-guiby jason-chao

                                                                                                                                                                                                          C# doticonstar image 8 doticonVersion:v0.2.5betadoticon
                                                                                                                                                                                                          License: Permissive (MIT)

                                                                                                                                                                                                          Cross-platform GUI Client for Computer Vision APIs (Google Vision, Microsoft Cognitive Services, Clarifai and Keras' open source models)

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                                                                                                                                                                                                                    memespector-guiby jason-chao

                                                                                                                                                                                                                    C# doticon star image 8 doticonVersion:v0.2.5betadoticon License: Permissive (MIT)

                                                                                                                                                                                                                    Cross-platform GUI Client for Computer Vision APIs (Google Vision, Microsoft Cognitive Services, Clarifai and Keras' open source models)
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                                                                                                                                                                                                                              Visionby PensoTeam

                                                                                                                                                                                                                              C# doticonstar image 8 doticonVersion:Currentdoticon
                                                                                                                                                                                                                              License: Permissive (MIT)

                                                                                                                                                                                                                              Computer Vision And Neural Network Engine

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                                                                                                                                                                                                                                        Visionby PensoTeam

                                                                                                                                                                                                                                        C# doticon star image 8 doticonVersion:Currentdoticon License: Permissive (MIT)

                                                                                                                                                                                                                                        Computer Vision And Neural Network Engine
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                                                                                                                                                                                                                                                  hidden-tear-recodedby PaulIRL

                                                                                                                                                                                                                                                  C# doticonstar image 4 doticonVersion:Currentdoticon
                                                                                                                                                                                                                                                  License: Strong Copyleft (GPL-3.0)

                                                                                                                                                                                                                                                  A recode of the open source ransomware "Hidden Tear", this has fixes for all of the old hidden tear problems and has a bit cleaner code

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                                                                                                                                                                                                                                                            hidden-tear-recodedby PaulIRL

                                                                                                                                                                                                                                                            C# doticon star image 4 doticonVersion:Currentdoticon License: Strong Copyleft (GPL-3.0)

                                                                                                                                                                                                                                                            A recode of the open source ransomware "Hidden Tear", this has fixes for all of the old hidden tear problems and has a bit cleaner code
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