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功能说明

基于AForge.NET实现视频与图像抓取

开发工具

Visual Studio v2015

.NET Framework 4 Client Profile

WPF与WinForm控件交互

要实现视频功能，需要使用AForge.Controls命名空间中的VideoSourcePlayer控件。这是一个WinForm控件，要在WPF程序中使用，我们需要做如下4步：

添加引用：

在.NET选项卡中选择WindowsFormsIntegration

在浏览选项卡中添加3个AForge.NET类库

AForge.Controls.dll

AForge.Video.dll

AForge.Video.DirectShow.dll

在XAML中添加System.Windows.Forms.Integration命名空间

xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"

在XAML中添加AForge.Controls命名空间

xmlns:aforge ="clr-namespace:AForge.Controls;assembly=AForge.Controls"

在XAML中加入VideoSourcePlayer可视控件

演示程序界面

源代码下载

源代码

MainWindow.xaml

xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration"

xmlns:aforge ="clr-namespace:AForge.Controls;assembly=AForge.Controls"

xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

xmlns:my="clr-namespace:Splash;assembly=FingerPictureBox"

Title="FaceCapture-AForgeNET-WPF" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="480" d:DesignWidth="902" SizeToContent="WidthAndHeight" WindowStartupLocation="CenterScreen" ResizeMode="CanMinimize" AllowDrop="True" Closing="Window_Closing">

MainWindow.xaml.cs

/* ----------------------------------------------------------

文件名称：MainWindow.xaml.cs

作者：秦建辉

微信：splashcn

博客：http://www.firstsolver.com/wordpress/

开发环境：

Visual Studio V2015

.NET Framework 4 Client Profile

AForge.NET 2.2.5

版本历史：

V1.02016年11月01日

基于AForge.NET实现视频与图像抓取

参考资料：

http://www.aforgenet.com/framework/

------------------------------------------------------------ */

using AForge.Video.DirectShow;

using System;

using System.Windows;

using System.Windows.Media.Imaging;

namespace Splash

{

///

/// MainWindow.xaml 的交互逻辑

///

public partial class MainWindow : Window

{

BitmapSource ImagePlay;

BitmapSource ImageStop;

public MainWindow()

{

InitializeComponent();

// 设置窗体图标

this.Icon = System.Windows.Interop.Imaging.CreateBitmapSourceFromHIcon(

Properties.Resources.FingerPictureBox.Handle,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

// 图像源初始化

ImagePlay = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

Properties.Resources.Button_Play_icon2.GetHbitmap(),

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

ImageStop = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

Properties.Resources.Button_Stop_icon.GetHbitmap(),

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

// 设置按钮图像

image_Play.Source = ImagePlay;

image_Capture.Source = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

Properties.Resources.capture.GetHbitmap(),

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

// 设置窗体装载后事件处理器

this.Loaded += new RoutedEventHandler(MainWindow_Loaded);

}

private void MainWindow_Loaded(object sender, RoutedEventArgs e)

{ // 设定初始视频设备

comboBoxVideoDevices.ItemsSource = new FilterInfoCollection(FilterCategory.VideoInputDevice);

comboBoxVideoDevices.DisplayMemberPath = "Name";

if(comboBoxVideoDevices.Items.Count > 0)

{

comboBoxVideoDevices.SelectedIndex = 0;

if (comboBoxVideoDevices.Items.Count == 1) comboBoxVideoDevices.IsEnabled = false;

}

else

{

button_Play.IsEnabled = false;

button_Capture.IsEnabled = false;

}

// 设置图片框初始图像

BitmapSource bs = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

Properties.Resources.noimage.GetHbitmap(),

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

fingerPictureBox1.InitialImage = bs;

fingerPictureBox2.InitialImage = bs;

fingerPictureBox3.InitialImage = bs;

fingerPictureBox4.InitialImage = bs;

}

private void button_Play_Click(object sender, RoutedEventArgs e)

{

if (image_Play.Source == ImagePlay)

{

if (comboBoxVideoDevices.SelectedIndex != -1)

{ // 开启视频

vsp.VideoSource = new VideoCaptureDevice(((FilterInfo)comboBoxVideoDevices.SelectedItem).MonikerString);

vsp.Start();

if (vsp.IsRunning)

{ // 改变按钮为“停止”状态

image_Play.Source = ImageStop;

label_Play.Content = "停止";

// 允许拍照

button_Capture.IsEnabled = true;

}

}

}

else

{

if (vsp.IsRunning)

{ // 停止视频

vsp.SignalToStop();

vsp.WaitForStop();

// 改变按钮为“开始”状态

image_Play.Source = ImagePlay;

label_Play.Content = "开启视频"; ;

// 关闭拍照

button_Capture.IsEnabled = false;

}

}

}

private void button_Capture_Click(object sender, RoutedEventArgs e)

{

// 判断视频设备是否开启

if (vsp.IsRunning)

{ // 进行拍照

for (Int32 i = 1; i <= 4; i++)

{

object box = this.FindName("fingerPictureBox" + i);

if (box is FingerPictureBox)

{

if ((box as FingerPictureBox).ActiveImage == (box as FingerPictureBox).InitialImage)

{ // 更新图像

(box as FingerPictureBox).ActiveImage = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(

vsp.GetCurrentVideoFrame().GetHbitmap(),

IntPtr.Zero,

Int32Rect.Empty,

BitmapSizeOptions.FromEmptyOptions());

break;

}

}

}

}

}

private void Window_Closing(object sender, System.ComponentModel.CancelEventArgs e)

{

if (vsp.IsRunning)

{ // 停止视频

vsp.SignalToStop();

vsp.WaitForStop();

}

}

}

}