C＃和USB红外摄像机 [英] C# and USB IR camera

问题描述

您好，我在c＃中设计了一个窗口，其中包含一个组合框（包含检测到的USB设备），一个图片框（用于视频），一个标签，一个启动按钮（启动摄像头）和一个刷新按钮。

我有一个USB安全红外摄像头，我想连接到电脑，希望在图片盒中获得一些视频。



我调试并构建了项目，设计的窗口弹出应有的位置。当我连接USB相机时按下刷新按钮，它将被写入组合框USB 2.0 grabber。当我按下启动按钮时没有任何反应。有人可以帮助我/向我解释如何将视频输入到图片框中吗？我真的很感激一些帮助。



源代码如下：

使用System; 
使用System.Collections.Generic;使用System.ComponentModel 
; 
使用System.Data;使用System.Drawing 
; 
使用System.Text; 
使用System.Windows.Forms; 
 
使用AForge.Video; 
使用AForge.Video.DirectShow; 
 
命名空间cam_aforge1 
 {
公共部分类Form1：表格
 {
 private bool DeviceExist = false; 
 private FilterInfoCollection videoDevices; 
 private VideoCaptureDevice videoSource = null; 
 
 public Form1（）
 {
 InitializeComponent（）; 
} 
 
 //获取设备名称
 private void getCamList（）
 {
 try 
 {
 videoDevices = new FilterInfoCollection（FilterCategory.VideoInputDevice）; 
 comboBox1.Items.Clear（）; 
 if（videoDevices.Count == 0）
抛出新的ApplicationException（）; 
 
 DeviceExist = true; 
 foreach（videoDevices中的FilterInfo设备）
 {
 comboBox1.Items.Add（device.Name）; 
} 
 comboBox1.SelectedIndex = 0; //使dafault转到第一个凸轮
} 
 catch（ApplicationException）
 {
 DeviceExist = false; 
 comboBox1.Items.Add（系统上没有捕获设备）; 
} 
} 
 
 //刷新按钮
 private void rfsh_Click（object sender，EventArgs e）
 {
 getCamList（）; 
} 
 
 //切换开始和停止按钮
 private void start_Click（object sender，EventArgs e）
 {
 if（start.Text == & Start）
 {
 if（DeviceExist）
 {
 videoSource = new VideoCaptureDevice（videoDevices [comboBox1.SelectedIndex] .MonikerString）; 
 videoSource.NewFrame + = new NewFrameEventHandler（video_NewFrame）; 
 064 CloseVideoSource（）; 
 videoSource.DesiredFrameSize = new Size（160,120）; 
 //videoSource.DesiredFrameRate = 10; 
 videoSource.Start（）; 
 label2.Text =设备运行......; 
 start.Text =& Stop; 
 timer1.Enabled = true; 
} 
其他
 {
 label2.Text =错误：未选择任何设备。; 
} 
} 
 else 
 {
 if（videoSource.IsRunning）
 {
 timer1.Enabled = false; 
 CloseVideoSource（）; 
 label2.Text =设备已停止。; 
 start.Text =& Start; 
} 
} 
} 
 
 //如果新帧准备好，则为eventhandler 
 private void video_NewFrame（object sender，NewFrameEventArgs eventArgs）
 { 
 Bitmap img =（Bitmap）eventArgs.Frame.Clone（）; 
 //在这里处理
 pictureBox1.Image = img; 
} 
 
 //安全关闭设备
 private void CloseVideoSource（）
 {
 if（！（videoSource == null））
 if（videoSource.IsRunning）
 {
 videoSource.SignalToStop（）; 
 videoSource = null; 
} 
} 
 
 //获得1秒钟收到的总帧数
 private void timer1_Tick（object sender，EventArgs e）
 {
 label2.Text =设备运行...+ videoSource.FramesReceived.ToString（）+FPS; 
} 
 
 //防止设备运行时突然关闭
 private void Form1_FormClosed（object sender，FormClosedEventArgs e）
 {
 CloseVideoSource（）; 
} 
} 
} 

解决方案

首先， PictureBox 对于渲染视频绝对没用。此外，渲染任何动态和交互式的东西都是无用的 - 你可以这样做，但是使用直接从 System.Windows.Forms.Control 派生的自定义控件，或者只是 Panel 会更容易，提供更好的性能甚至更少的编码。 PictureBox 不是帮手，而是麻烦。



来自视频供稿（视频预览）来自USB摄像头，请参阅这些CodeProject文章：

Camera Vision - 视频监控C＃ [ ^ ]（作者其他文章 Andrew Kirillov ，强烈推荐）;

< a href =http://www.codeproject.com/KB/audio-video/WebcamUsingDirectShowNET.aspx>使用DirectShow.NET的网络摄像头 [ ^ ]。



你可以找到很多更多，如果你谷歌它。

-SA

这里有一些有用的解决方案:(有些可能包括在内de捕捉网络摄像头图像，但他们都显示如何让它显示在图片框中）



如何在C＃中使用带有.NET Framework 4.0和Microsoft Expression Encoder 4的网络摄像头 [ ^ ]



^ ]





http://www.c-sharpcorner.com/uploadfile/youg使用C-Sharp-net-and-com-part-viii / [ ^ ] < br $> b $ b

（这是我使用的那个。我很喜欢）



Versatile WebCam C＃库 [ ^

Hello, i have designed a window in c# which contains one combobox(contains detected USB devices), one picturebox(for the video), one label, one start button(starts the camera)and one refresh button.
I have a USB security IR camera which i want to connect to the computer and hopefully get some video feed in the picturebox.

I have debugged and builded the project and the designed window pops up as it should. When i push the refresh button while the USB camera is connected,it is written in the combobox "USB 2.0 grabber". When i then push the start button nothing happens. Can somebody help me/explain to me how to get the video feed into the picture box? I really appreciate some help.

Source code follows:

using System;  
using System.Collections.Generic;  
using System.ComponentModel;  
using System.Data;  
using System.Drawing;  
using System.Text;  
using System.Windows.Forms;  
   
using AForge.Video;  
using AForge.Video.DirectShow;  
    
namespace cam_aforge1  
 {  
     public partial class Form1 : Form  
     {  
         private bool DeviceExist = false;  
         private FilterInfoCollection videoDevices;  
         private VideoCaptureDevice videoSource = null;  
    
         public Form1()  
         {  
             InitializeComponent();  
         }  
    
         // get the devices name  
         private void getCamList()  
         {  
             try 
             {  
                 videoDevices = new FilterInfoCollection    (FilterCategory.VideoInputDevice);  
                 comboBox1.Items.Clear();  
                 if (videoDevices.Count == 0)  
                     throw new ApplicationException();  
    
                 DeviceExist = true;  
                 foreach (FilterInfo device in videoDevices)  
                 {  
                     comboBox1.Items.Add(device.Name);  
                 }  
                 comboBox1.SelectedIndex = 0; //make dafault to first cam  
             }  
             catch (ApplicationException)  
             {  
                 DeviceExist = false;  
                 comboBox1.Items.Add("No capture device on your system");  
             }  
         }  
    
         //refresh button  
         private void rfsh_Click(object sender, EventArgs e)  
         {  
             getCamList();  
         }  
    
         //toggle start and stop button  
         private void start_Click(object sender, EventArgs e)  
         {  
             if (start.Text == "&Start")  
             {  
                 if (DeviceExist)  
                 {  
                     videoSource = new VideoCaptureDevice(videoDevices[comboBox1.SelectedIndex].MonikerString);  
                     videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);  
064                     CloseVideoSource();  
                     videoSource.DesiredFrameSize = new Size(160,120);  
                     //videoSource.DesiredFrameRate = 10;  
                     videoSource.Start();  
                     label2.Text = "Device running...";  
                     start.Text = "&Stop";  
                    timer1.Enabled = true;  
                 }  
                 else 
                 {  
                     label2.Text = "Error: No Device selected.";  
                }  
             }  
             else 
             {  
                 if (videoSource.IsRunning)  
                 {  
                     timer1.Enabled = false;  
                     CloseVideoSource();  
                     label2.Text = "Device stopped.";  
                     start.Text = "&Start";  
                 }  
             }  
         }  
    
         //eventhandler if new frame is ready  
         private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)  
         {  
             Bitmap img = (Bitmap)eventArgs.Frame.Clone();  
             //do processing here  
             pictureBox1.Image = img;  
         }  
    
         //close the device safely  
         private void CloseVideoSource()  
         {  
             if (!(videoSource == null))  
                 if (videoSource.IsRunning)  
                 {  
                     videoSource.SignalToStop();  
                     videoSource = null;  
                 }  
         }  
    
         //get total received frame at 1 second tick  
         private void timer1_Tick(object sender, EventArgs e)  
         {  
             label2.Text = "Device running... " + videoSource.FramesReceived.ToString() + " FPS";  
         }  
    
         //prevent sudden close while device is running  
         private void Form1_FormClosed(object sender, FormClosedEventArgs e)  
         {  
             CloseVideoSource();  
         }  
     }  
 } 

解决方案

First of all, PictureBox is absolutely useless for rendering video. Moreover, it's quite useless for rendering anything dynamic and interactive — you could do it, but using a custom control derived directly from System.Windows.Forms.Control or just Panel would be much easier and provide better performance and even less coding. The PictureBox is not a helper but rather a hassle here.

For the video feed (video preview) from USB camera, see, for example, these CodeProject articles:
Camera Vision - video surveillance on C#[^] (see other articles by its author Andrew Kirillov, highly recommended);
Webcam using DirectShow.NET[^].

You can find a lot more if you Google for it.

—SA

Here are some helpful solutions: (Some may include capturing webcam images but they all show ways to get it to show in the picture box)

How to use a web cam in C# with .NET Framework 4.0 and Microsoft Expression Encoder 4[^]

Webcam in C#: Easiest Way to Capture Images from Your Webcams[^]


http://www.c-sharpcorner.com/uploadfile/yougerthen/integrate-the-web-webcam-functionality-using-C-Sharp-net-and-com-part-viii/[^]

(This is the one I use. I like it)

Versatile WebCam C# library[^]

这篇关于C＃和USB红外摄像机的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！