使用.NET从网络摄像头进行运动检测以控制鼠标指针

Question

我的.NET应用程序捕获并检测网络摄像头中特定类型对象的运动。我能够通过翻译物体的运动来控制鼠标在我的形状中的移动。然而，我想控制鼠标在窗体之外的移动，就像某种虚拟鼠标一样。

实现这一目标的最佳技术是什么？

Answer 1

要在代码中执行单击并将光标移动到窗体外部的操作：

[DllImport("user32.dll")]
static extern void mouse_event(int flags, int dX, int dY, int buttons, int extraInfo);
#region mouseConstants
const int MOUSE_MOVE = 0x00000001;
const int MOUSE_LEFTDOWN = 0x00000002;
const int MOUSE_LEFTUP = 0x00000004;
const int MOUSE_RIGHTDOWN = 0x00000008;
const int MOUSE_RIGHTUP = 0x00000010;
const int MOUSE_MIDDLEDOWN = 0x00000020;
const int MOUSE_MIDDLEUP = 0x00000040;
const int MOUSE_WHEEL = 0x00000800;
const int MOUSE_ABSOLUTE = 0x00008000; 
#endregion

private void performClick(int posX, int posY)
{
    Cursor.Position = new Point(posX, posY);  // to move the cursor at desired position
    mouse_event(MOUSE_LEFTDOWN, 0, 0, 0, 0);  // to perform left mouse down
    mouse_event(MOUSE_LEFTUP, 0, 0, 0, 0);    // to perform left mouse up
}

Answer 2

您可以尝试通过Win API调用来实现此目的：

 [DllImport("user32.dll")]
 static extern bool SetCursorPos(int X, int Y);

 [DllImport("user32.dll")]
 public static extern bool GetCursorPos(out Point pt);

 Point current;
 GetCursorPos(out current);
 SetCursorPos(current.X + 10, current.Y + 10);

这将在应用程序之外工作。

Answer 3

在C#中：

//using System.Windows.Forms;
//using System.Drawing;
Cursor.Position = new Point(x, y);

或者，如果您想要移动鼠标，而不是定位它：

//using System.Windows.Forms;
//using System.Drawing;
Cursor.Position = Cursor.Position + new Size(deltaX, deltaY);