Motion Detection Algorithms视频中运动检测算法源代码及演示代码

原文地址：http://www.codesoso.com/code/Motion_Detection.aspx

本文实现了在连续视频数据流中几种不同的运动检测算法，他们都是基于当前帧图像和前一帧图像的比较，程序使用了AForge.NET framework库。其中的示例代码支持下面几种视频格式：AVI文件、网路相机的JPEG和MJPEG，本地的采集设备(USB相机等)。

感兴趣区域的获得方法：

// create processing filters sequence
FiltersSequence processingFilter = new FiltersSequence( );
processingFilter.Add( new Difference( backgroundFrame ) );
processingFilter.Add( new Threshold( 15 ) );
processingFilter.Add( new Opening( ) );
processingFilter.Add( new Edges( ) );
// apply the filter
Bitmap tmp1 = processingFilter.Apply( currentFrame );

// extract red channel from the original image
IFilter extrachChannel = new ExtractChannel( RGB.R );
Bitmap redChannel = extrachChannel.Apply( image );
//  merge red channel with moving object borders
Merge mergeFilter = new Merge( );
mergeFilter.OverlayImage = tmp1;
Bitmap tmp2 = mergeFilter.Apply( redChannel );
// replace red channel in the original image
ReplaceChannel replaceChannel = new ReplaceChannel( RGB.R );
replaceChannel.ChannelImage = tmp2;
Bitmap tmp3 = replaceChannel.Apply( image );