Halcon and WinForm study section 1

Study halcon Of HWindowControl Use of control

---

List of articles

• List of articles
• Preface
• One 、Halcon What is it? ？
• Two 、 Use steps
  • 1. install Halcon
  • 2. Import control library
  • 3. Use of control
  • summary

---

Preface

With the development of industrial automation, the scene of visual inspection application has also become broad , This is the birth of halcon Such an application , It integrates common operator algorithms , So that general projects can be delivered quickly , Here is the first section of study

---

One 、Halcon What is it? ？

 HALCON yes Software widely used in the field of industrial automation , Application software that can quickly and effectively solve image processing problems .

Two 、 Use steps

1. install

Go to the official website to download and install , After installation, you can find it in the directory DLL.

2. Import and stock in

The code is as follows （ Example ）：halcondotnet.dll

using HalconDotNet;

3. Control use

After importing the library HWindowControl Can be directly in winform As shown in the figure

using HalconDotNet;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Vision.Winform
{
    public class MouseOnHalConModel { 
        public HTuple Row { set; get; }
        public HTuple Column { set; get; }
        public HTuple PointGray { set; get; }
    }
    public class HalConHelper
    {
        public Action<MouseOnHalConModel> mouseMoveAction;
        public HalConHelper(HWindowControl hWindowControl)
        {
            windowID = hWindowControl.HalconWindow;
            //  windowID = window;
            hWindowControl.HMouseWheel += HWindowControl1_HMouseWheel;
            hWindowControl.HMouseDown += HWindowControl1_HMouseDown;
            hWindowControl.HMouseUp += HWindowControl1_HMouseUp;
            hWindowControl.HMouseMove += HWindowControl1_HMouseMove;
        }

        private void HWindowControl1_HMouseMove(object sender, HMouseEventArgs e)
        {
            try
            {
                HTuple row, column, button, pointGray;
                HOperatorSet.GetMposition(windowID, out row, out column, out button);              // Get the coordinate value of the current mouse 
                if (imageHeight != null && (row > 0 && row < imageHeight) && (column > 0 && column < imageWidth))// Set up 3 Conditions , Prevent the program from crashing .
                {
                    HOperatorSet.GetGrayval(ho_image, row, column, out pointGray);                 // Get the gray value of the current point 
                }
                else
                {
                    pointGray = "_";
                }
                String str = String.Format("Row:{0}  Column:{1}  Gray:{2}", row, column, pointGray); // Formatted string 
                                                                                                     //label1.Text = str;
                mouseMoveAction?.Invoke(new MouseOnHalConModel() { Column = column, Row = row, PointGray = pointGray });
            }
            catch { 
            
            }
        }

        private void HWindowControl1_HMouseUp(object sender, HMouseEventArgs e)
        {
            try
            {
                HTuple row1, col1, row2, col2, row, column, button;
                HOperatorSet.GetMposition(windowID, out row, out column, out button);
                double rowMove = row - rowDown;   // The line coordinates when the mouse is up minus the line coordinates when the mouse is down , Get the moving value of the row coordinates 
                double colMove = column - colDown;// The column coordinates when the mouse is up minus the column coordinates when the mouse is down , Get the movement value of column coordinates 
                HOperatorSet.GetPart(windowID, out row1, out col1, out row2, out col2);// Get the current window coordinates 
                HOperatorSet.SetPart(windowID, row1 - rowMove, col1 - colMove, row2 - rowMove, col2 - colMove);// There may be something difficult to understand . Take the origin of the upper left corner as the reference point 
                HOperatorSet.ClearWindow(windowID);
                if (imageHeight != null)
                {
                    HOperatorSet.DispObj(ho_image, windowID);
                }
                else
                {
                    MyMessageBox.ShowAlert(" Please load an image first ");
                }
            }
            catch { 
            
            }
        }

        private void HWindowControl1_HMouseDown(object sender, HMouseEventArgs e)
        {
            HTuple row, column, button;
            HOperatorSet.GetMposition(windowID, out row, out column, out button);
            rowDown = row;    // Row coordinates when the mouse is pressed 
            colDown = column; // Column coordinates when the mouse is pressed 
        }

        public HTuple windowID, imageWidth, imageHeight;
        private double rowDown;// Row coordinates when the mouse is pressed 
        private double colDown;// Column coordinates when the mouse is pressed 
        public HObject ho_image;      // Image variables 
        private void HWindowControl1_HMouseWheel(object sender, HMouseEventArgs e)
        {
            HTuple zoom, row, col, button;
            HTuple row0, column0, row00, column00, ht, wt, r1, c1, r2, c2;
            if (e.Delta > 0)
            {
                zoom = 1.5;
            }
            else
            {
                zoom = 0.5;
            }
            HOperatorSet.GetMposition(windowID, out row, out col, out button);
            HOperatorSet.GetPart(windowID, out row0, out column0, out row00, out column00);
            ht = row00 - row0;
            wt = column00 - column0;
            if (ht * wt < 32000 * 32000 || zoom == 1.5)// Normal version halcon The maximum size of the image that can be processed is 32K*32K. If you infinitely reduce the original image , Cause the displayed image to exceed the limit , Will cause the program to crash 
            {
                r1 = (row0 + ((1 - (1.0 / zoom)) * (row - row0)));
                c1 = (column0 + ((1 - (1.0 / zoom)) * (col - column0)));
                r2 = r1 + (ht / zoom);
                c2 = c1 + (wt / zoom);
                HOperatorSet.SetPart(windowID, r1, c1, r2, c2);
                HOperatorSet.ClearWindow(windowID);
                HOperatorSet.DispObj(ho_image, windowID);
            }
        }
    }
}

---

summary

That's all halcon The first section of the introduction , Installation and dll Library reference , Control .