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 somethingget_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 HDevelopHOperatorSet.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 somethinghv_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 somethinghv_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timerHOperatorSet.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timerHOperatorSet.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：

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