Basler相机Sdk采图的演示例程（C#）

这个话题的起因是追求极速的拍图速度。

机器ppm不达标的情况下，往往对视觉的处理速度有变态的要求，为了争取处理时间最短，几十毫秒也要争取。

halcon的接口是通用接口，其速度是比不上相机厂商自己相机配套的SDK的采图速度的。

下面程序运行后，500w的CCD拍图的时间（不算显示时间）达到惊人的32毫秒，如果用halcon接口，最快的我见过是180毫秒。

using Basler.Pylon;
using HalconDotNet;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
 
namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        private PixelDataConverter converter = new PixelDataConverter();
          /// 
        /// 相机ID
        /// 
        public string UserID { get { return userID; } }
        private string userID = string.Empty;
 
        private Stopwatch sw = new Stopwatch();
        private bool isOkGrab = false;
        private IntPtr latestFrameAddress = IntPtr.Zero;
        public HObject Image { get { return image; } }
        private HObject image = null;
        static Version Sfnc2_0_0 = new Version(2, 0, 0);
        private Camera camera = null;
        HTuple handle;
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            var f1=BaslerCameraInit();
            if(f1)
            {
               MessageBox.Show( Open().ToString());
            }
        }
 
        
        /// 
        /// 实例化第一个找到的相机
        /// 
        public bool BaslerCameraInit()
        {
            try
            {
                camera = new Camera();
                  camera.StreamGrabber.ImageGrabbed -= StreamGrabber_ImageGrabbed;
                camera.StreamGrabber.ImageGrabbed+=StreamGrabber_ImageGrabbed;
                return true;
            }
            catch (Exception ex)
            {
                return false;
              //NotifyG.Error(ex.ToString());
            }
        }
 
 
         /// 
        /// 根据相机UserID实例化相机
        /// 
        /// 
        public bool BaslerCameraInit(string userID)
        {
            try
            {
                // 枚举相机列表
                List allCameraInfos = CameraFinder.Enumerate();
                foreach (ICameraInfo cameraInfo in allCameraInfos)
                {
                    if (userID == cameraInfo[CameraInfoKey.UserDefinedName])
                    {
                        this.userID = userID;
                        camera = new Camera(cameraInfo);
                        camera.StreamGrabber.ImageGrabbed -= StreamGrabber_ImageGrabbed;
                        camera.StreamGrabber.ImageGrabbed += StreamGrabber_ImageGrabbed;
                    }
                }
                if (camera == null)
                {
                    //NotifyG.Error("未识别到UserID为“" + UserID + "”的相机！");
                    return false;
                }
                return true;
            }
            catch (Exception ex)
            {
                return false;
                //NotifyG.Error(ex.ToString());
            }
        }
 
 
        void StreamGrabber_ImageGrabbed(object sender, ImageGrabbedEventArgs e)
        {
            try
            {
                // Acquire the image from the camera. Only show the latest image. The camera may acquire images faster than the images can be displayed.
 
                // Get the grab result.
                IGrabResult grabResult = e.GrabResult;
 
                // Check if the image can be displayed.
                if (grabResult.IsValid)
                {
                    //grabTime = sw.ElapsedMilliseconds;
                    //if (eventComputeGrabTime != null) eventComputeGrabTime(grabTime);
 
                    //Reduce the number of displayed images to a reasonable amount if the camera is acquiring images very fast.
                    // ****  降低显示帧率，减少CPU占用率  **** //
                    //if (!stopWatch.IsRunning || stopWatch.ElapsedMilliseconds > 33)
                    {
                        //stopWatch.Restart();
                        // 判断是否是黑白图片格式
                        if (grabResult.PixelTypeValue == PixelType.Mono8)
                        {
                            //allocate the m_stream_size amount of bytes in non-managed environment 
                            if (latestFrameAddress == IntPtr.Zero)
                            {
                                latestFrameAddress = Marshal.AllocHGlobal((Int32)grabResult.PayloadSize);
                            }
                            converter.OutputPixelFormat = PixelType.Mono8;
                            converter.Convert(latestFrameAddress, grabResult.PayloadSize, grabResult);
                            HOperatorSet.GenEmptyObj(out image);
                            image.Dispose();
                            // 转换为Halcon图像显示
                            HOperatorSet.GenImage1(out image, "byte", grabResult.Width, grabResult.Height, latestFrameAddress);
                            HOperatorSet.SetPart(handle, 0, 0, grabResult.Height - 1, grabResult.Width - 1);
                        }
                        else if (grabResult.PixelTypeValue == PixelType.BayerBG8 || grabResult.PixelTypeValue == PixelType.BayerGB8
                                    || grabResult.PixelTypeValue == PixelType.BayerRG8 || grabResult.PixelTypeValue == PixelType.YUV422packed)
                        {
                            int imageWidth = grabResult.Width - 1;
                            int imageHeight = grabResult.Height - 1;
                            HOperatorSet.SetPart(handle, 0, 0, imageHeight, imageWidth);
                            int payloadSize = imageWidth * imageHeight;
 
                            //allocate the m_stream_size amount of bytes in non-managed environment 
                            if (latestFrameAddress == IntPtr.Zero)
                            {
                                latestFrameAddress = Marshal.AllocHGlobal((Int32)(3 * payloadSize));
                            }
                            converter.OutputPixelFormat = PixelType.RGB8packed;     // 根据下面halcon转换的色彩格式bgr
                            converter.Parameters[PLPixelDataConverter.InconvertibleEdgeHandling].SetValue("Clip");
                            converter.Convert(latestFrameAddress, 3 * payloadSize, grabResult);
 
                            HOperatorSet.GenImageInterleaved(out image, latestFrameAddress, "bgr",
                                     (HTuple)imageWidth, (HTuple)imageHeight, -1, "byte", (HTuple)imageWidth, (HTuple)imageHeight, 0, 0, -1, 0);
                        }
                        else
                        {
                            //NotifyG.Error(DeviceName + "拍照失败,相机图像格式设置");
                            return;
                        }
                        isOkGrab = true;
                        //MessageBox.Show(isOkGrab.ToString());
                        // 抛出图像处理事件
                        //if (EventGrab != null) EventGrab(this, new CameraGrabEventArgs(image));
                    }
                }
            
            }
            catch (Exception ex)
            {
                //MessageBox.Show(ex.ToString());
                return;
            }
            finally
            {
                // Dispose the grab result if needed for returning it to the grab loop.
                e.DisposeGrabResultIfClone();
            }
        }
 
        /// 
        /// 打开相机
        /// 
        public bool Open()
        {
            try
            {
                if (camera.IsOpen) camera.Close();
                Thread.Sleep(200);
                camera.Open();
                var imageWidth = camera.Parameters[PLCamera.Width].GetValue();               // 获取图像宽 
                var imageHeight = camera.Parameters[PLCamera.Height].GetValue();              // 获取图像高
                GetMinMaxExposureTime();
                GetMinMaxGain();
                camera.Parameters[PLCamera.AcquisitionMode].SetValue(PLCamera.AcquisitionMode.SingleFrame);
                //NotifyG.Debug(DeviceName + "打开相机成功:" + userID);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return false;
            }
            return true;
        }
 
        /// 
        /// 关闭相机,释放相关资源
        /// 
        public new bool Close()
        {
            try
            {
                camera.Close();
                camera.Dispose();
                if (Image != null)
                {
                    Image.Dispose();
                }
                if (latestFrameAddress != null)
                {
                    Marshal.FreeHGlobal(latestFrameAddress);
                    latestFrameAddress = IntPtr.Zero;
                }
                //NotifyG.Debug(DeviceName + "关闭相机成功:" + userID);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return false;
            }
            return true;
        }
 
        /// 
        /// 单张采集
        /// 
        public bool GrabImage()
        {
            try
            {
                isOkGrab = false;
                sw.Restart();
                if (camera.StreamGrabber.IsGrabbing)
                {
                    //NotifyG.Error("相机当前正处于采集状态！");
                    return false;
                }
                else
                {
                    camera.StreamGrabber.Start(1, GrabStrategy.LatestImages, GrabLoop.ProvidedByStreamGrabber);
                    //while (!isOkGrab)
                    //{
                    //    if (sw.ElapsedMilliseconds > 2000) { isOkGrab = false; return false; }
                    //    Thread.Sleep(1);
                    //}
                    //NotifyG.Debug(DeviceName + "拍照成功:" + sw.ElapsedMilliseconds);
                    return true;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
                return false;
            }
            return true;
        }
 
        /// 
        /// 开始连续采集
        /// 
        public bool StartGrabbing()
        {
            try
            {
                if (camera.StreamGrabber.IsGrabbing)
                {
                    //NotifyG.Error("相机当前正处于采集状态！");
                    return false;
                }
                else
                {
                    camera.Parameters[PLCamera.AcquisitionMode].SetValue(PLCamera.AcquisitionMode.Continuous);
                    camera.StreamGrabber.Start(GrabStrategy.LatestImages, GrabLoop.ProvidedByStreamGrabber);
                 
                    return true;
                }
            }
            catch (Exception ex)
            {
                //NotifyG.Error(DeviceName + ex.ToString());
                return false;
            }
        }
 
        /// 
        /// 停止连续采集
        /// 
        public bool StopGrabbing()
        {
            try
            {
                if (camera.StreamGrabber.IsGrabbing)
                {
                    camera.StreamGrabber.Stop();
                }
            }
            catch (Exception ex)
            {
                //NotifyG.Error(DeviceName + ex.ToString());
            }
            return true;
        }
 
 
        /// 
        /// 获取最小最大曝光时间
        /// 
        public void GetMinMaxExposureTime()
        {
            try
            {
                if (camera.GetSfncVersion() < Sfnc2_0_0)
                {
                    var minExposureTime = camera.Parameters[PLCamera.ExposureTimeRaw].GetMinimum();
                    var maxExposureTime = camera.Parameters[PLCamera.ExposureTimeRaw].GetMaximum();
                }
                else
                {
                    var minExposureTime = (long)camera.Parameters[PLUsbCamera.ExposureTime].GetMinimum();
                    var maxExposureTime = (long)camera.Parameters[PLUsbCamera.ExposureTime].GetMaximum();
                }
            }
            catch (Exception ex)
            {
                
            }
        }
 
        /// 
        /// 获取最小最大增益
        /// 
        public void GetMinMaxGain()
        {
            try
            {
                if (camera.GetSfncVersion() < Sfnc2_0_0)
                {
                    var minGain = camera.Parameters[PLCamera.GainRaw].GetMinimum();
                    var maxGain = camera.Parameters[PLCamera.GainRaw].GetMaximum();
                }
                else
                {
                    var minGain = (long)camera.Parameters[PLUsbCamera.Gain].GetMinimum();
                    var maxGain = (long)camera.Parameters[PLUsbCamera.Gain].GetMaximum();
                }
            }
            catch (Exception ex)
            {
                //NotifyG.Error(DeviceName + ex.ToString());
            }
        }
 
        private void button2_Click(object sender, EventArgs e)
        {
            Stopwatch sw1 = new Stopwatch();
            sw1.Start();
            var f1 = GrabImage();
            sw1.Stop();
            MessageBox.Show(string.Format("grab time:{0}",sw1.ElapsedMilliseconds));
            //if(f1)
            //{
            //    if (null != Image)
            //        HOperatorSet.DispObj(Image, hWindowControl1.Handle);
            //}
        }
 
        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (null != camera && camera.IsOpen)
                Close();
        }
 
        private void button6_Click(object sender, EventArgs e)
        {
            try
            {
                if (null != Image && Image.IsInitialized())
                {
                    //HOperatorSet.WriteImage(Image, "bmp", 0, "d:\\123.bmp");
                    HOperatorSet.DispObj(Image, handle);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
 
        private void Form1_Load(object sender, EventArgs e)
        {
            handle = hWindowControl1.HalconWindow;
           
        }
 
        private void button3_Click(object sender, EventArgs e)
        {
            timer1.Start();
            StartGrabbing();
        }
 
        private void button4_Click(object sender, EventArgs e)
        {
            timer1.Stop();
            StopGrabbing();
        }
 
        private void timer1_Tick(object sender, EventArgs e)
        {
            button6_Click(null, null);
        }
 
 
    }
}