WPF中经过AForge实现USB摄像头拍照

最近因为某种缘由呢，须要作一下拍照的功能，原本我纠结到底用AForge类库仍是用WPFMediaKit.dll ，不事后来看网上说WPFMediaKit.dll 是截图而AForge是直接经过摄像头拍照，因而乎，我就选择了AForge类库。express

首先留下发帖时我所用的AForge　　　　连接：https://pan.baidu.com/s/1htmOjPi 密码：tovdide

第一步spa

　　将AForge中的DLL添加进引用，而后添加引用System.Drawing，System.Windows.Forms，WindowsFormsIntegrationcode

第二步orm

　　加上视频

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

　　还有htm

　　<wfi:WindowsFormsHost Grid.Row="0" HorizontalAlignment="Left" Width="517" Height="320" VerticalAlignment="Top">
<aforge:VideoSourcePlayer x:Name="player" Height="480" Width="640"/>
</wfi:WindowsFormsHost>blog

　　下面贴详细代码进程

MainWindow.xaml

<Window x:Class="FaceOne.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:local="clr-namespace:FaceOne" xmlns:wfi ="clr-namespace:System.Windows.Forms.Integration;assembly=WindowsFormsIntegration" xmlns:aforge ="clr-namespace:AForge.Controls;assembly=AForge.Controls" mc:Ignorable="d" Title="MainWindow" Height="600" Width="800" Loaded="Window_Loaded">
    <Grid>
        <wfi:WindowsFormsHost Grid.Row="0" HorizontalAlignment="Left" Width="517" Height="320" VerticalAlignment="Top">
            <aforge:VideoSourcePlayer x:Name="player" Height="480" Width="640"/>
        </wfi:WindowsFormsHost>
        <Button x:Name="connectBtn" Content="链接" HorizontalAlignment="Left" Margin="53,439,0,0" VerticalAlignment="Top" Width="75" Click="connectBtn_Click"/>
        <Button x:Name="captureBtn" Content="拍照" HorizontalAlignment="Left" Margin="180,439,0,0" VerticalAlignment="Top" Width="75" Click="captureBtn_Click"/>
        <Button x:Name="closeBtn" Content="断开" HorizontalAlignment="Left" Margin="312,439,0,0" VerticalAlignment="Top" Width="75" Click="closeBtn_Click"/>
        <Image x:Name="imageCapture" HorizontalAlignment="Left" Height="210" Margin="522,66,0,0" VerticalAlignment="Top" Width="239"/>

    </Grid>
</Window>

MainWindow.xaml.cs

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; namespace FaceOne { /// <summary>
    /// MainWindow.xaml 的交互逻辑 /// </summary>
    public partial class MainWindow : Window { MyCapture myCapture = MyCapture.Instance(); public MainWindow() { InitializeComponent(); } private void Window_Loaded(object sender, RoutedEventArgs e) { //myCapture.sourcePlayer = player;//配置好XAML后再加上这句，便可看到摄像头的视图
 myCapture.getCamera();//获取摄像头
            myCapture.saveOk += ImageSaveOk;//保存照片后触发
 } //链接
        private void connectBtn_Click(object sender, RoutedEventArgs e) { myCapture.CameraConn(); } //拍照
        private void captureBtn_Click(object sender, RoutedEventArgs e) { myCapture.CaputreImage(); } //断开
        private void closeBtn_Click(object sender, RoutedEventArgs e) { myCapture.CloseDevice(); } //保存照片后触发(想看预览就用，不想看就不须要了)
        private void ImageSaveOk(string str) { /*//老套的赋值方式，不会释放内存 BitmapImage bit = new BitmapImage(); bit.BeginInit(); bit.UriSource = new Uri(AppDomain.CurrentDomain.BaseDirectory+str); bit.EndInit(); imageCapture.Source = bit;*/ BitmapImage bmi = myCapture.InitImage(str); imageCapture.Source = bmi; } } }

MyCapture.cs

using AForge.Controls; using AForge.Video.DirectShow; using System; using System.Collections.Generic; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Linq; using System.Text; using System.Threading.Tasks; using System.Windows.Media.Imaging; namespace FaceOne { class MyCapture { public delegate void SaveOk(string str); public SaveOk saveOk; private static MyCapture instance; public static MyCapture Instance() { if (instance == null) { instance = new MyCapture(); } return instance; } //private static FilterInfoCollection _cameraDevices;
        private FilterInfoCollection videoDevices; //private static VideoCaptureDevice div = null;
 VideoCaptureDevice videoSource; public VideoSourcePlayer sourcePlayer = new VideoSourcePlayer(); public void getCamera() { // 获取电脑已经安装的视频设备
            videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); if (videoDevices != null && videoDevices.Count > 0) { foreach (FilterInfo device in videoDevices) { Console.WriteLine(device.Name); } //CameraConn();
 } } //链接而且打开摄像头
        public void CameraConn() { if (videoDevices.Count <= 0) { Console.WriteLine("请插入视频设备"); return; } videoSource= new VideoCaptureDevice(videoDevices[0].MonikerString);//链接到第一个设备，可灵活改动 //videoSource.DesiredFrameSize = new System.Drawing.Size(240, 320); //videoSource.DesiredFrameRate = 1;
 sourcePlayer.VideoSource = videoSource; videoSource.Start(); sourcePlayer.Start(); } //截取一帧图像并保存
        public void CaputreImage(string filePath=null,string fileName=null) { if (sourcePlayer.VideoSource == null) { return; } //判断是否有这个目录，若是没有则新建立这个目录
            /*if (!Directory.Exists(filePath)) { Directory.CreateDirectory(filePath); }*/
            try { Image bitmap = sourcePlayer.GetCurrentVideoFrame(); /*if (fileName == null) { fileName = DateTime.Now.ToString("yyyy-MM-dd-HH-mm-ss"); }*/ //string str = @"" + fileName + ".jpg"; string str = "asd.jpg";//使用InitImage能够重复读写一张图，不用的话，就只能一直保存新的图片了
                bitmap.Save(str,ImageFormat.Jpeg); //想看预览就用，不想看就不须要了
 bitmap.Dispose(); saveOk(str); } catch(Exception e) { Console.WriteLine(e.Message.ToString()); } } //关闭摄像头设备
        public void CloseDevice() { if (videoSource != null && videoSource.IsRunning) { sourcePlayer.Stop(); videoSource.SignalToStop(); videoSource = null; videoDevices = null; } } //解决不一样进程读取同一张图片的问题，使用流来读图片
        public BitmapImage InitImage(string filePath) { BitmapImage bitmapImage; using (BinaryReader reader = new BinaryReader(File.Open(filePath, FileMode.Open))) { FileInfo fi = new FileInfo(filePath); byte[] bytes = reader.ReadBytes((int)fi.Length); reader.Close(); //image = new Image();
                bitmapImage = new BitmapImage(); bitmapImage.BeginInit(); bitmapImage.StreamSource = new MemoryStream(bytes); bitmapImage.EndInit(); bitmapImage.CacheOption = BitmapCacheOption.OnLoad; //image.Source = bitmapImage;
 reader.Dispose(); } return bitmapImage; } } }