.NET开源工程推荐（Accord，AForge，Emgu CV）
Accord.NET
The Accord.NET Framework provides machine learning, mathematics, statistics, computer vision, computer audition, and several scientific computing related methods and techniques to .NET. The project extends the popular AForge.NET Framework providing a more complete scientific computing environment.
项目主页： https://code.google.com/p/accord/
GitHub
：
http://accord-net.github.io/ https://github.com/accord-net
Application
FaceTracking 人脸追踪
https://code.google.com/p/accord/wiki/SampleApp_FaceTracking
Haar-feature Object Detection in C# 人脸检测
http://www.codeproject.com/Articles/441226/Haar-feature-Object-Detection-in-Csharp
（用于分类）Use Kernel Support Vector Machines (k-SVMs) to solve a classification problem.
https://code.google.com/p/accord/wiki/SampleApp_KSVM
https://code.google.com/p/accord/wiki/SampleApp_KSVM
（主成分分析）use Principal Component Analysis (PCA) to perform dimensionality redution
https://code.google.com/p/accord/wiki/SampleApp_PrincipalComponentAnalysis
AForge.NET
AForge.NET is an open source C# framework designed for developers and researchers in the fields of Computer Vision and Artificial Intelligence - image processing, neural networks, genetic algorithms, fuzzy logic, machine learning, robotics, etc.
项目主页： http://www.aforgenet.com/
on-line documentation：
http://www.aforgenet.com/framework/docs/
Application
Camera Vision - video surveillance on C#
http://www.codeproject.com/Articles/15537/Camera-Vision-video-surveillance-on-C
本人借鉴此工程，开发了一个智能视频监控软件：
http://www.cnblogs.com/rainbow203/archive/2013/03/30/2990720.html
Motion Detection Algorithms
http://www.codeproject.com/Articles/10248/Motion-Detection-Algorithms
Motion Detection介绍
http://www.aforgenet.com/framework/features/motion_detection_2.0.html
借用此基础上，加入我的智能分析算法，开发了摔倒检测功能：
视频演示：http://v.youku.com/v_show/id_XNjEwMjE2MTUy.html
Emgu CV
Emgu CV is a cross platform .Net wrapper to the OpenCV image processing library. Allowing OpenCV functions to be called from .NET compatible languages such as C#, VB, VC++, IronPython etc. The wrapper can be compiled in Mono and run on Windows, Linux, Mac OS X, iPhone, iPad and Android devices.
项目主页：http://www.emgu.com/wiki/index.php/Main_Page
Application
Pedestrian Detection 行人检测
http://www.emgu.com/wiki/index.php/Pedestrian_Detection_in_CSharp
其他应用举例：http://www.emgu.com/wiki/index.php/Tutorial#Examples
关于人脸识别
Multiple face detection and recognition in real time
http://www.codeproject.com/Articles/239849/Multiple-face-detection-and-recognition-in-real-ti
借鉴此工程中的算法，加入动作检测，进行了扩展：http://v.youku.com/v_show/id_XNTkzNjYxOTE2.html
关于智能语音识别
win7自带有语音识别功能，而基于微软的SpeechSDK能非常方便得开发出语音识别软件。
SpeechSDKTest：http://www.pudn.com/downloads539/sourcecode/windows/csharp/detail2224809.html
整合到项目中，能让系统更加智能和人性化