C# 大华相机图像采集

超、凢脫俗 2021-12-03 04:35 1010阅读 0赞

using System;
    using System.Collections.Generic;
    using System.Drawing;
    using System.Linq;
    using System.Threading;
    using System.Windows.Forms;
    using ThridLibray;
    
    namespace _1_5相机SDK图像采集
    {
        public class Camera
        {
            List<IGrabbedRawData> m_frameList = new List<IGrabbedRawData>();        /* 图像缓存列表 */
            Thread renderThread = null;         /* 显示线程  */
            bool m_bShowLoop = true;            /* 线程控制变量 */
            Mutex m_mutex = new Mutex();        /* 锁，保证多线程安全 */
    
            public event Action<Bitmap> NewImage;
    
            public Camera()
            {
                if (null == renderThread)
                {
                    renderThread = new Thread(new ThreadStart(ShowThread));
                    renderThread.IsBackground = true;
                    renderThread.Start();
                }
            }
    
    
            /* 转码显示线程 */
            private void ShowThread()
            {
                while (m_bShowLoop)
                {
                    if (m_frameList.Count == 0)
                    {
                        Thread.Sleep(1);
                        continue;
                    }
    
                    /* 图像队列取最新帧 */
                    m_mutex.WaitOne();
                    IGrabbedRawData frame = m_frameList.ElementAt(0);
                    m_frameList.RemoveAt(0);
                    m_frameList.Clear();
                    m_mutex.ReleaseMutex();
    
                    /* 主动调用回收垃圾 */
                    GC.Collect();
    
                    try
                    {
                        /* 图像转码成bitmap图像 */
                        var bitmap = frame.ToBitmap(false);
    
                        if (NewImage!=null)
                        {
                            NewImage(bitmap);
                        }
                    }
                    catch (Exception exception)
                    {
                        Catcher.Show(exception);
                    }
                }
            }
    
            /* 设备对象 */
            private IDevice m_dev;
    
            /* 相机打开回调 */
            private void OnCameraOpen(object sender, EventArgs e)
            {
                MessageBox.Show("相机已打开！");
            }
    
            /* 相机关闭回调 */
            private void OnCameraClose(object sender, EventArgs e)
            {
                MessageBox.Show("相机已关闭！");
            }
    
            /* 相机丢失回调 */
            private void OnConnectLoss(object sender, EventArgs e)
            {
                m_dev.ShutdownGrab();
                m_dev.Dispose();
                m_dev = null;
            }
    
            public void btnOpen()
            {
                try
                {
                    /* 设备搜索 */
                    List<IDeviceInfo> li = Enumerator.EnumerateDevices();
                    if (li.Count > 0)
                    {
                        /* 获取搜索到的第一个设备 */
                        m_dev = Enumerator.GetDeviceByIndex(0);
    
                        /* 注册链接事件 */
                        m_dev.CameraOpened += OnCameraOpen;
                        m_dev.CameraClosed += OnCameraClose;
    
                        /* 打开设备 */
                        if (!m_dev.Open())
                        {
                            MessageBox.Show(@"连接相机失败");
                            return;
                        }
    
                        /* 打开Software Trigger */
                        m_dev.TriggerSet.Open(TriggerSourceEnum.Software);
    
                        /* 设置图像格式 */
                        using (IEnumParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImagePixelFormat])
                        {
                            p.SetValue("Mono8");
                        }
    
                        /* 设置曝光 */
                        using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ExposureTime])
                        {
                            p.SetValue(1000);
                        }
    
                        /* 设置增益 */
                        using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.GainRaw])
                        {
                            p.SetValue(1.0);
                        }
    
                        /* 设置缓存个数为8（默认值为16） */
                        m_dev.StreamGrabber.SetBufferCount(8);
    
                        /* 注册码流回调事件 */
                        m_dev.StreamGrabber.ImageGrabbed += OnImageGrabbed;
    
                        /* 开启码流 */
                        if (!m_dev.GrabUsingGrabLoopThread())
                        {
                            MessageBox.Show(@"开启码流失败");
                            return;
                        }
                    }
                }
                catch (Exception exception)
                {
                    Catcher.Show(exception);
                }
            }
    
            /* 码流数据回调 */
            private void OnImageGrabbed(Object sender, GrabbedEventArgs e)
            {
                m_mutex.WaitOne();
                m_frameList.Add(e.GrabResult.Clone());
                m_mutex.ReleaseMutex();
            }
    
            /* 停止码流 */
            public void btnClose()
            {
                try
                {
                    if (m_dev == null)
                    {
                        throw new InvalidOperationException("Device is invalid");
                    }
    
                    m_dev.StreamGrabber.ImageGrabbed -= OnImageGrabbed;         /* 反注册回调 */
                    m_dev.ShutdownGrab();                                       /* 停止码流 */
                    m_dev.Close();                                              /* 关闭相机 */
                }
                catch (Exception exception)
                {
                    Catcher.Show(exception);
                }
            }
    
            /* 窗口关闭 */
            public void OnClosed(EventArgs e)
            {
                if (m_dev != null)
                {
                    m_dev.Dispose();
                    m_dev = null;
                }
    
                m_bShowLoop = false;
                renderThread.Join();
            }
    
            /* 执行软触发 */
            public void SoftwareTrigger()
            {
                if (m_dev == null)
                {
                    throw new InvalidOperationException("Device is invalid");
                }
    
                try
                {
                    m_dev.ExecuteSoftwareTrigger();
                }
                catch (Exception exception)
                {
                    Catcher.Show(exception);
                }
            }
        }
    }

转载于:https://www.cnblogs.com/BKYZFSN/p/11027417.html