c# 使用AForge.NET操作摄像头操作代码
AForge.NET是一个专门为开发者和研究者基于C#框架设计的,这个框架提供了不同的类库和关于类库的资源,还有很多应用程序例子,包括计算机视觉与人工智能,图像处理,神经网络,遗传算法,机器学习,机器人等领域。
来源:http://blog.csdn.net/gdjlc/article/details/8445701
根据网上的方法,运行程序摄像头出来了,但是怎么截图呢?找到一个显示图片方法如下
private void video_NewFrame(object sender, NewFrameEventArgs eventArgs) { Bitmap img = (Bitmap)eventArgs.Frame.Clone(); //do processing here pictureBox1.Image = img; }
开始参考这句代码写了:
private void video_NewFrame(object sender, NewFrameEventArgs eventArgs) { Bitmap img = (Bitmap)eventArgs.Frame.Clone(); string imgPath = dirc + "/" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg"; img.Save(imgPath); }
但是点击截图程序就自动不停截了大量的图片,最后导致程序出问题。想了一个笨方法,可以只截一次图:
private int flag = 1; /// <summary> /// 截图 /// </summary> private void toolStripButton3_Click(object sender, EventArgs e) { flag = 0; videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame); } private void video_NewFrame(object sender, NewFrameEventArgs eventArgs) { Bitmap bitmap = (Bitmap)eventArgs.Frame.Clone(); if (flag == 0) { string img = dirc + "/" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg"; bitmap.Save(img); flag = 1; } }
完整的程序代码如下:
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Drawing.Imaging; using System.Text; using System.Windows.Forms; using System.IO; using AForge; using AForge.Video; using AForge.Video.DirectShow; using AForge.Imaging; using AForge.Imaging.Filters; namespace Camera { public partial class Form1 : Form { private FilterInfoCollection videoDevices; private VideoCaptureDevice videoSource; private int flag = 1; private string dirc = System.AppDomain.CurrentDomain.BaseDirectory + "Images"; //截图保存的目录 public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { if (!Directory.Exists(dirc)) Directory.CreateDirectory(dirc); try { // 枚举所有视频输入设备 videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); if (videoDevices.Count == 0) throw new ApplicationException(); foreach (FilterInfo device in videoDevices) { tscbxCameras.Items.Add(device.Name); } tscbxCameras.SelectedIndex = 0; } catch (ApplicationException) { tscbxCameras.Items.Add("No local capture devices"); videoDevices = null; } } private void toolStripButton1_Click(object sender, EventArgs e) { CameraConn(); } /// <summary> /// 连接开启摄像头 /// </summary> private void CameraConn() { videoSource = new VideoCaptureDevice(videoDevices[tscbxCameras.SelectedIndex].MonikerString); videoSource.DesiredFrameSize = new Size(500, 300); videoSource.DesiredFrameRate = 1; videPlayer.VideoSource = videoSource; videPlayer.Start(); } /// <summary> /// 关闭摄像头 /// </summary> private void toolStripButton2_Click(object sender, EventArgs e) { videPlayer.SignalToStop(); videPlayer.WaitForStop(); } private void Form1_FormClosing(object sender, FormClosingEventArgs e) { toolStripButton2_Click(null, null); } /// <summary> /// 截图 /// </summary> private void toolStripButton3_Click(object sender, EventArgs e) { flag = 0; videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame); } private void video_NewFrame(object sender, NewFrameEventArgs eventArgs) { Bitmap bitmap = (Bitmap)eventArgs.Frame.Clone(); if (flag == 0) { string img = dirc + "/" + DateTime.Now.ToString("yyyyMMddhhmmss") + ".jpg"; bitmap.Save(img); flag = 1; } } } }