如何设计一个视频监控系统（用C#实现）急！

你好:

我一个同学要做关于室内视频监控的系统,请我帮忙,可是我也是不会.

大概的需求是:用一台电脑,当系统运行时摄像头抓拍一张室内原图,然后每过一定时间再次抓图,然后对比两张图,如果不一样,系统就自动在本机报警(方式自选),然后把报警情况通过网络传送到其他电脑上.

我大致想了一下,觉得第一是解决如何把系统连接摄像头并抓图,第二抓图以后保存,

第三,如何对比前后两张图的差别,这里好象是把图象转化为灰度图然后对比.

第四,如何远程报警.

我现在仅仅找到了一个关于设像头视频采集的方法:

但是我自己没有设像头无法实验,另外下面的代码也是不完整的我补了一部分已经标注了,希望你帮我看看如何完成以下C#代码程序:

//本文是借助avicap32.dll库来驱动摄像头。做到了抓图功能。
using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;

namespace using System;
using System.Runtime.InteropServices;
using System.Drawing;
using System.Drawing.Imaging;

namespace PickHead
{
/// <summary>
/// 一个控制摄像头的类
/// </summary>
public class Pick
{
  private const int WM_USER = 0x400;
  private const int WS_CHILD = 0x40000000;
  private const int WS_VISIBLE = 0x10000000;
  private const int WM_CAP_START = WM_USER;
  private const int WM_CAP_STOP = WM_CAP_START + 68;
  private const int WM_CAP_DRIVER_CONNECT = WM_CAP_START + 10;
  private const int WM_CAP_DRIVER_DISCONNECT = WM_CAP_START + 11;
  private const int WM_CAP_SAVEDIB = WM_CAP_START + 25;
  private const int WM_CAP_GRAB_FRAME = WM_CAP_START + 60;
  private const int WM_CAP_SEQUENCE = WM_CAP_START + 62;
  private const int WM_CAP_FILE_SET_CAPTURE_FILEA = WM_CAP_START + 20;
  private const int WM_CAP_SEQUENCE_NOFILE =WM_CAP_START+ 63;
  private const int WM_CAP_SET_OVERLAY =WM_CAP_START+ 51;
  private const int WM_CAP_SET_PREVIEW =WM_CAP_START+ 50;
  private const int WM_CAP_SET_CALLBACK_VIDEOSTREAM = WM_CAP_START +6;
  private const int WM_CAP_SET_CALLBACK_ERROR=WM_CAP_START +2;
  private const int WM_CAP_SET_CALLBACK_STATUSA= WM_CAP_START +3;
  private const int WM_CAP_SET_CALLBACK_FRAME= WM_CAP_START +5;
  private const int WM_CAP_SET_SCALE=WM_CAP_START+ 53;
  private const int WM_CAP_SET_PREVIEWRATE=WM_CAP_START+ 52;
  private IntPtr hWndC;
  private bool bStat = false;

  private IntPtr mControlPtr;
  private int mWidth;
  private int mHeight;
  private int mLeft;
  private int mTop;

  /// <summary>
  /// 初始化摄像头
  /// </summary>
  /// <param name="handle">控件的句柄</param>
  /// <param name="left">开始显示的左边距</param>
  /// <param name="top">开始显示的上边距</param>
  /// <param name="width">要显示的宽度</param>
  /// <param name="height">要显示的长度</param>
  public Pick(IntPtr handle, int left, int top, int width,int height)
  {
   mControlPtr = handle;
   mWidth = width;
   mHeight = height;
   mLeft = left;
   mTop = top;
  }

  [DllImport("avicap32.dll")]
  private static extern IntPtr capCreateCaptureWindowA(byte[] lpszWindowName, int dwStyle, int x, int y, int nWidth, int nHeight, IntPtr hWndParent, int nID);

  [DllImport("avicap32.dll")]
  private static extern int capGetVideoFormat(IntPtr hWnd, IntPtr psVideoFormat, int wSize );
  [DllImport("User32.dll")]
  private static extern bool SendMessage(IntPtr hWnd, int wMsg, int wParam, long lParam);
  /// 开始显示图像
  public void Start()
  {
   if (bStat)
    return;
   bStat = true;
   byte[] lpszName = new byte[100];
   hWndC = capCreateCaptureWindowA(lpszName,WS_CHILD|WS_VISIBLE ,mLeft,mTop,mWidth,mHeight,mControlPtr,0);
   if (hWndC.ToInt32() != 0)
   {
    SendMessage(hWndC, WM_CAP_SET_CALLBACK_VIDEOSTREAM, 0, 0);
    SendMessage(hWndC, WM_CAP_SET_CALLBACK_ERROR, 0, 0);
    SendMessage(hWndC, WM_CAP_SET_CALLBACK_STATUSA, 0, 0);
    SendMessage(hWndC, WM_CAP_DRIVER_CONNECT, 0, 0);
    SendMessage(hWndC, WM_CAP_SET_SCALE, 1, 0);
    SendMessage(hWndC, WM_CAP_SET_PREVIEWRATE, 66, 0);
    SendMessage(hWndC, WM_CAP_SET_OVERLAY, 1, 0);
    SendMessage(hWndC, WM_CAP_SET_PREVIEW, 1, 0);
   }
   return;
  }
  /// 停止显示
  public void Stop()
  {
   SendMessage(hWndC, WM_CAP_DRIVER_DISCONNECT, 0, 0);
   bStat = false;
  }
  /// 抓图
  /// <param name="path">要保存bmp文件的路径</param>
  public void GrabImage(string path)
  {

   IntPtr hBmp = Marshal.StringToHGlobalAnsi(path);
   SendMessage(hWndC,WM_CAP_SAVEDIB,0,hBmp.ToInt64());

  }
}
}
public class Working           //这个类是我自己加的
{ static void Main()
  {Pick a=new Pick();//需要参数可我不知道IntPtr handle该怎么写?
   a.Start();
   a. GrabImage("C:\");
  }
}

另外你是否能对这个系统的设计提出一些意见或建议,还有你能帮我介绍一些有关方面经验的高手吗?

谢谢!
--------------------编程问答-------------------- 建议你以fms来实现图像处理，而以c#来实现图像的识别和报警。 --------------------编程问答-------------------- 只能帮顶了 --------------------编程问答-------------------- 呵呵，调用OpenCV吧，蛮快的 --------------------编程问答-------------------- up --------------------编程问答-------------------- UPUP --------------------编程问答-------------------- 现成的：
http://www.codeproject.com/csharp/motion_detection.asp --------------------编程问答-------------------- 这涉及到移动监测的事情  不过不是太难    我开发过海康卡的程序  那里有现成的 sdk --------------------编程问答-------------------- 感觉不如装个移动探头更有效 --------------------编程问答-------------------- up --------------------编程问答-------------------- 友情帮顶

补充：.NET技术 ,  C#