C# 大華相機圖像采集

using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Threading;
using System.Windows.Forms;
using ThridLibray;

namespace _1_5相機SDK圖像采集
{
    public class Camera
    {
        List<IGrabbedRawData> m_frameList = new List<IGrabbedRawData>();        /* 圖像緩存列表 */
        Thread renderThread = null;         /* 顯示線程  */
        bool m_bShowLoop = true;            /* 線程控制變量 */
        Mutex m_mutex = new Mutex();        /* 鎖，保證多線程安全 */

        public event Action<Bitmap> NewImage;

        public Camera()
        {
            if (null == renderThread)
            {
                renderThread = new Thread(new ThreadStart(ShowThread));
                renderThread.IsBackground = true;
                renderThread.Start();
            }
        }


        /* 轉碼顯示線程 */
        private void ShowThread()
        {
            while (m_bShowLoop)
            {
                if (m_frameList.Count == 0)
                {
                    Thread.Sleep(1);
                    continue;
                }

                /* 圖像隊列取最新幀 */
                m_mutex.WaitOne();
                IGrabbedRawData frame = m_frameList.ElementAt(0);
                m_frameList.RemoveAt(0);
                m_frameList.Clear();
                m_mutex.ReleaseMutex();

                /* 主動調用回收垃圾 */
                GC.Collect();

                try
                {
                    /* 圖像轉碼成bitmap圖像 */
                    var bitmap = frame.ToBitmap(false);

                    if (NewImage!=null)
                    {
                        NewImage(bitmap);
                    }
                }
                catch (Exception exception)
                {
                    Catcher.Show(exception);
                }
            }
        }

        /* 設備對象 */
        private IDevice m_dev;

        /* 相機打開回調 */
        private void OnCameraOpen(object sender, EventArgs e)
        {
            MessageBox.Show("相機已打開！");
        }

        /* 相機關閉回調 */
        private void OnCameraClose(object sender, EventArgs e)
        {
            MessageBox.Show("相機已關閉！");
        }

        /* 相機丟失回調 */
        private void OnConnectLoss(object sender, EventArgs e)
        {
            m_dev.ShutdownGrab();
            m_dev.Dispose();
            m_dev = null;
        }

        public void btnOpen()
        {
            try
            {
                /* 設備搜索 */
                List<IDeviceInfo> li = Enumerator.EnumerateDevices();
                if (li.Count > 0)
                {
                    /* 獲取搜索到的第一個設備 */
                    m_dev = Enumerator.GetDeviceByIndex(0);

                    /* 注冊鏈接事件 */
                    m_dev.CameraOpened += OnCameraOpen;
                    m_dev.CameraClosed += OnCameraClose;

                    /* 打開設備 */
                    if (!m_dev.Open())
                    {
                        MessageBox.Show(@"連接相機失敗");
                        return;
                    }

                    /* 打開Software Trigger */
                    m_dev.TriggerSet.Open(TriggerSourceEnum.Software);

                    /* 設置圖像格式 */
                    using (IEnumParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ImagePixelFormat])
                    {
                        p.SetValue("Mono8");
                    }

                    /* 設置曝光 */
                    using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.ExposureTime])
                    {
                        p.SetValue(1000);
                    }

                    /* 設置增益 */
                    using (IFloatParameter p = m_dev.ParameterCollection[ParametrizeNameSet.GainRaw])
                    {
                        p.SetValue(1.0);
                    }

                    /* 設置緩存個數為8（默認值為16） */
                    m_dev.StreamGrabber.SetBufferCount(8);

                    /* 注冊碼流回調事件 */
                    m_dev.StreamGrabber.ImageGrabbed += OnImageGrabbed;

                    /* 開啟碼流 */
                    if (!m_dev.GrabUsingGrabLoopThread())
                    {
                        MessageBox.Show(@"開啟碼流失敗");
                        return;
                    }
                }
            }
            catch (Exception exception)
            {
                Catcher.Show(exception);
            }
        }

        /* 碼流數據回調 */
        private void OnImageGrabbed(Object sender, GrabbedEventArgs e)
        {
            m_mutex.WaitOne();
            m_frameList.Add(e.GrabResult.Clone());
            m_mutex.ReleaseMutex();
        }

        /* 停止碼流 */
        public void btnClose()
        {
            try
            {
                if (m_dev == null)
                {
                    throw new InvalidOperationException("Device is invalid");
                }

                m_dev.StreamGrabber.ImageGrabbed -= OnImageGrabbed;         /* 反注冊回調 */
                m_dev.ShutdownGrab();                                       /* 停止碼流 */
                m_dev.Close();                                              /* 關閉相機 */
            }
            catch (Exception exception)
            {
                Catcher.Show(exception);
            }
        }

        /* 窗口關閉 */
        public void OnClosed(EventArgs e)
        {
            if (m_dev != null)
            {
                m_dev.Dispose();
                m_dev = null;
            }

            m_bShowLoop = false;
            renderThread.Join();
        }

        /* 執行軟觸發 */
        public void SoftwareTrigger()
        {
            if (m_dev == null)
            {
                throw new InvalidOperationException("Device is invalid");
            }

            try
            {
                m_dev.ExecuteSoftwareTrigger();
            }
            catch (Exception exception)
            {
                Catcher.Show(exception);
            }
        }
    }
}