Halcon联合C#实现相机实时显示采集图像

窗体如图：

本窗体功能为打开相机、相机的实时显示采集、关闭相机。
HALCON代码：

* Image Acquisition 01: Code generated by Image Acquisition 01
* Image Acquisition 01: Attention: The initialization may fail in case parameters need to
* Image Acquisition 01: be set in a specific order (e.g., image resolution vs. offset).
open_framegrabber ('DirectShow', 1, 1, 0, 0, 0, 0, 'default', 8, 'rgb', -1, 'false', 'default', '[0] Integrated Webcam', 0, -1, AcqHandle)
set_framegrabber_param (AcqHandle, 'grab_timeout', 2000)
set_framegrabber_param (AcqHandle, 'gamma', 116)
grab_image_start (AcqHandle, -1)
while (true)
    grab_image_async (Image, AcqHandle, -1)
    * Image Acquisition 01: Do something
    get_image_size (Image, Width, Height)
    dev_set_part (0, 0, Height, Width)
endwhile
close_framegrabber (AcqHandle)

HALCON导出的C#代码：

//
// File generated by HDevelop for HALCON/.NET (C#) Version 19.11.0.0
// Non-ASCII strings in this file are encoded in local-8-bit encoding (cp936).
// 
// Please note that non-ASCII characters in string constants are exported
// as octal codes in order to guarantee that the strings are correctly
// created on all systems, independent on any compiler settings.
// 
// Source files with different encoding should not be mixed in one project.
//

using HalconDotNet;

public partial class HDevelopExport
{
#if !(NO_EXPORT_MAIN || NO_EXPORT_APP_MAIN)
  public HDevelopExport()
  {
    // Default settings used in HDevelop
    HOperatorSet.SetSystem("width", 512);
    HOperatorSet.SetSystem("height", 512);
    if (HalconAPI.isWindows)
      HOperatorSet.SetSystem("use_window_thread","true");
    action();
  }
#endif

#if !NO_EXPORT_MAIN
  // Main procedure 
  private void action()
  {


    // Local iconic variables 

    HObject ho_Image=null;

    // Local control variables 

    HTuple hv_AcqHandle = new HTuple(), hv_Width = new HTuple();
    HTuple hv_Height = new HTuple();
    // Initialize local and output iconic variables 
    HOperatorSet.GenEmptyObj(out ho_Image);
    //Image Acquisition 01: Code generated by Image Acquisition 01
    //Image Acquisition 01: Attention: The initialization may fail in case parameters need to
    //Image Acquisition 01: be set in a specific order (e.g., image resolution vs. offset).
    hv_AcqHandle.Dispose();
    HOperatorSet.OpenFramegrabber("DirectShow", 1, 1, 0, 0, 0, 0, "default", 8, "rgb", 
        -1, "false", "default", "[0] Integrated Webcam", 0, -1, out hv_AcqHandle);
    HOperatorSet.SetFramegrabberParam(hv_AcqHandle, "grab_timeout", 2000);
    HOperatorSet.SetFramegrabberParam(hv_AcqHandle, "gamma", 116);
    HOperatorSet.GrabImageStart(hv_AcqHandle, -1);
    while ((int)(1) != 0)
    {
      ho_Image.Dispose();
      HOperatorSet.GrabImageAsync(out ho_Image, hv_AcqHandle, -1);
      //Image Acquisition 01: Do something
      hv_Width.Dispose();hv_Height.Dispose();
      HOperatorSet.GetImageSize(ho_Image, out hv_Width, out hv_Height);
      if (HDevWindowStack.IsOpen())
      {
        HOperatorSet.SetPart(HDevWindowStack.GetActive(), 0, 0, hv_Height, hv_Width);
      }
    }
    HOperatorSet.CloseFramegrabber(hv_AcqHandle);
    ho_Image.Dispose();

    hv_AcqHandle.Dispose();
    hv_Width.Dispose();
    hv_Height.Dispose();

  }

#endif


}
#if !(NO_EXPORT_MAIN || NO_EXPORT_APP_MAIN)
public class HDevelopExportApp
{
  static void Main(string[] args)
  {
    new HDevelopExport();
  }
}
#endif

程序源码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using HalconDotNet;

namespace open_cam
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        HObject ho_Image = null;
        HTuple hv_AcqHandle = new HTuple();
        HTuple hv_Width = new HTuple();
        HTuple hv_Height = new HTuple();
        private void button1_Click(object sender, EventArgs e)
        {
            //HTuple hv_AcqHandle = new HTuple();
            // Initialize local and output iconic variables 
            HOperatorSet.GenEmptyObj(out ho_Image);
            //Image Acquisition 01: Code generated by Image Acquisition 01
            //Image Acquisition 01: Attention: The initialization may fail in case parameters need to
            //Image Acquisition 01: be set in a specific order (e.g., image resolution vs. offset).
            hv_AcqHandle.Dispose();
            HOperatorSet.OpenFramegrabber("DirectShow", 1, 1, 0, 0, 0, 0, "default", 8, "rgb",
                -1, "false", "default", "[0] Integrated Webcam", 0, -1, out hv_AcqHandle);
            HOperatorSet.SetFramegrabberParam(hv_AcqHandle, "grab_timeout", 2000);
            HOperatorSet.SetFramegrabberParam(hv_AcqHandle, "gamma", 116);
            HOperatorSet.GrabImageStart(hv_AcqHandle, -1);
        }
        HTuple hv_WindowHandle = new HTuple();
        private void button2_Click(object sender, EventArgs e)
        {
            timer1.Enabled = true;
            HOperatorSet.OpenWindow(0, 0, hWindowControl1.Width, hWindowControl1.Height, hWindowControl1.HalconWindow, "visible", "", out hv_WindowHandle);//open window,将图片的长宽改为控件的长宽
            HDevWindowStack.Push(hv_WindowHandle);//入栈
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            
            ho_Image.Dispose();
            
            //hv_AcqHandle.Dispose();
            HOperatorSet.GrabImageAsync(out ho_Image, hv_AcqHandle, -1);
            //Image Acquisition 01: Do something
            hv_Width.Dispose(); hv_Height.Dispose();
            HOperatorSet.GetImageSize(ho_Image, out hv_Width, out hv_Height);
            if (HDevWindowStack.IsOpen())
            {
                HOperatorSet.SetPart(HDevWindowStack.GetActive(), 0, 0, hv_Height, hv_Width);
            }
            if (HDevWindowStack.IsOpen())//实时显示
            {
                HOperatorSet.DispObj(ho_Image, HDevWindowStack.GetActive());
                
            }


            
        }

        private void button3_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;//一定要关闭timer
            HOperatorSet.CloseFramegrabber(hv_AcqHandle);
            ho_Image.Dispose();
        }
    }
}

注意：
在button3的事件中记得关闭timer

private void button3_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;//一定要关闭timer
            HOperatorSet.CloseFramegrabber(hv_AcqHandle);
            ho_Image.Dispose();
        }

图像的显示函数：

if (HDevWindowStack.IsOpen())//实时显示
            {
                HOperatorSet.DispObj(ho_Image, HDevWindowStack.GetActive());
                
            }

图像显示效果：