当前位置 : 主页 > 网络编程 > c#编程 >

WPF实现调用本机摄像头的示例代码

来源:互联网 收集:自由互联 发布时间:2023-01-31
此项目使用了OpenCVSharp加载本地摄像头,多个摄像头支持切换展示,也可以展示rtsp地址。 使用NuGet如下: 代码如下 一、创建MainWindow.xaml代码如下。  ws:Window x:Class="OpenCVSharpExample.Main

此项目使用了OpenCVSharp加载本地摄像头,多个摄像头支持切换展示,也可以展示rtsp地址。

使用NuGet如下:

代码如下

一、创建MainWindow.xaml代码如下。

 <ws:Window x:Class="OpenCVSharpExample.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:ws="https://github.com/WPFDevelopersOrg.WPFDevelopers.Minimal"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:OpenCVSharpExample"
        Icon="OpenCV_Logo.png"
        mc:Ignorable="d" WindowStartupLocation="CenterScreen"
        Title="OpenCVSharpExample https://github.com/WPFDevelopersOrg" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition />
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <ComboBox Name="ComboBoxCamera" ItemsSource="{Binding CameraArray,RelativeSource={RelativeSource AncestorType=local:MainWindow}}" 
                  Width="200" SelectedIndex="{Binding CameraIndex,RelativeSource={RelativeSource AncestorType=local:MainWindow}}"
                  SelectionChanged="ComboBoxCamera_SelectionChanged"/>
        <Image Grid.Row="1" Name="imgViewport" Margin="0,4"/>
        <StackPanel Orientation="Horizontal"
                    HorizontalAlignment="Center"
                    Grid.Row="2">
            <!--<Button Name="btRecord" Click="btRecord_Click" Content="Record" Style="{StaticResource PrimaryButton}" Width="100" Height="50" Margin="16"/>-->
            <Button Name="btStop" Click="btStop_Click" Content="Stop"  Width="100" Height="50" Margin="16"/>
        </StackPanel>
    </Grid>
</ws:Window>

二、MainWindow.xaml.cs代码如下。

using OpenCvSharp;
using OpenCvSharp.Extensions;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Management;
using System.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Imaging;
using System.Windows.Threading;

namespace OpenCVSharpExample
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow
    {
        private VideoCapture capCamera;
        private Mat matImage = new Mat();
        private Thread cameraThread;

        public List<string> CameraArray
        {
            get { return (List<string>)GetValue(CameraArrayProperty); }
            set { SetValue(CameraArrayProperty, value); }
        }

        public static readonly DependencyProperty CameraArrayProperty =
            DependencyProperty.Register("CameraArray", typeof(List<string>), typeof(MainWindow), new PropertyMetadata(null));



        public int CameraIndex
        {
            get { return (int)GetValue(CameraIndexProperty); }
            set { SetValue(CameraIndexProperty, value); }
        }

        public static readonly DependencyProperty CameraIndexProperty =
            DependencyProperty.Register("CameraIndex", typeof(int), typeof(MainWindow), new PropertyMetadata(0));



        

        public MainWindow()
        {
            InitializeComponent();
            Width = SystemParameters.WorkArea.Width / 1.5;
            Height = SystemParameters.WorkArea.Height / 1.5;
            this.Loaded += MainWindow_Loaded;

        }

        private void MainWindow_Loaded(object sender, RoutedEventArgs e)
        {
            InitializeCamera();
        }
        private void ComboBoxCamera_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (CameraArray.Count - 1 < CameraIndex)
                return;

            if (capCamera != null && cameraThread != null)
            {
                cameraThread.Abort();
                StopDispose();
            }

            capCamera = new VideoCapture(CameraIndex);
            capCamera.Fps = 30;
            CreateCamera();
            
        }

        private void InitializeCamera()
        {
            CameraArray = GetAllConnectedCameras();
        }
        List<string> GetAllConnectedCameras()
        {
            var cameraNames = new List<string>();
            using (var searcher = new ManagementObjectSearcher("SELECT * FROM Win32_PnPEntity WHERE (PNPClass = 'Image' OR PNPClass = 'Camera')"))
            {
                foreach (var device in searcher.Get())
                {
                    cameraNames.Add(device["Caption"].ToString());
                }
            }

            return cameraNames;
        }

        void CreateCamera()
        {
            cameraThread = new Thread(PlayCamera);
            cameraThread.Start();
        }

        private void PlayCamera()
        {
            while (capCamera != null && !capCamera.IsDisposed)
            {
                capCamera.Read(matImage);
                if (matImage.Empty()) break;
                Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() =>
                {
                    var converted = Convert(BitmapConverter.ToBitmap(matImage));
                    imgViewport.Source = converted;
                }));
            }
        }
       
        private void btStop_Click(object sender, RoutedEventArgs e)
        {
            StopDispose();
            btStop.IsEnabled = false;
        }

        void StopDispose()
        {
            if (capCamera != null && capCamera.IsOpened())
            {
                capCamera.Dispose();
                capCamera = null;
            }
        }

        void CreateRecord()
        {
            cameraThread = new Thread(PlayCamera);
            cameraThread.Start();
        }

        BitmapImage Convert(Bitmap src)
        {
            System.Drawing.Image img = src;
            var now = DateTime.Now;
            var g = Graphics.FromImage(img);
            var brush = new SolidBrush(System.Drawing.Color.Red);
            g.DrawString($"北京时间:{ now.ToString("yyyy年MM月dd日 HH:mm:ss")}", new System.Drawing.Font("Arial", 18), brush, new PointF(5, 5));
            brush.Dispose();
            g.Dispose();
            MemoryStream ms = new MemoryStream();
            img.Save(ms, ImageFormat.Bmp);
            ms.Seek(0, SeekOrigin.Begin);
            BitmapImage image = new BitmapImage();
            image.BeginInit();
            image.StreamSource = ms;
            image.EndInit();
            image.Freeze();
            return image;
        }

        protected override void OnClosed(EventArgs e)
        {
            StopDispose();
        }


    }
}

效果预览

源码地址如下

Github:https://github.com/WPFDevelopersOrg

https://github.com/WPFDevelopersOrg/OpenCVSharpExample

Gitee:https://gitee.com/WPFDevelopersOrg

到此这篇关于WPF实现调用本机摄像头的示例代码的文章就介绍到这了,更多相关WPF调用摄像头内容请搜索自由互联以前的文章或继续浏览下面的相关文章希望大家以后多多支持自由互联!

上一篇:C#中Attribute特性的用法
下一篇:没有了
网友评论