Halcon与Winform学习第一节

学习halcon的HWindowControl控件的使用

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文章目录

• 系列文章目录
• 前言
• 一、Halcon是什么？
• 二、使用步骤
  • 1.安装Halcon
  • 2.引入控件库
  • 3.控件的使用
  • 总结

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前言

随着工业自动化的发展视觉检测应用的场景也变得广阔，这就诞生了halcon这样的应用，集成了常见的算子算法，让一般项目可以快速交付，这里是学习的第一节

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一、Halcon是什么？

 HALCON是目前工业自动化领域广泛使用的软件,可以快速有效的解决图像处理问题的应用软件。

二、使用步骤

1.安装

可去到官方网站上下载安装，安装后可在目录下找到DLL。

2.引入库

代码如下（示例）：halcondotnet.dll

using HalconDotNet;

3. 控件使用

引入库后HWindowControl可以直接在winform中使用如图

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);              //获取当前鼠标的坐标值
                if (imageHeight != null && (row > 0 && row < imageHeight) && (column > 0 && column < imageWidth))//设置3个条件项，防止程序崩溃。
                {
                    HOperatorSet.GetGrayval(ho_image, row, column, out pointGray);                 //获取当前点的灰度值
                }
                else
                {
                    pointGray = "_";
                }
                String str = String.Format("Row:{0}  Column:{1}  Gray:{2}", row, column, pointGray); //格式化字符串
                                                                                                     //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;   //鼠标弹起时的行坐标减去按下时的行坐标，得到行坐标的移动值
                double colMove = column - colDown;//鼠标弹起时的列坐标减去按下时的列坐标，得到列坐标的移动值
                HOperatorSet.GetPart(windowID, out row1, out col1, out row2, out col2);//得到当前的窗口坐标
                HOperatorSet.SetPart(windowID, row1 - rowMove, col1 - colMove, row2 - rowMove, col2 - colMove);//这里可能有些不好理解。以左上角原点为参考点
                HOperatorSet.ClearWindow(windowID);
                if (imageHeight != null)
                {
                    HOperatorSet.DispObj(ho_image, windowID);
                }
                else
                {
                    MyMessageBox.ShowAlert("请先加载一张图像");
                }
            }
            catch { 
            
            }
        }

        private void HWindowControl1_HMouseDown(object sender, HMouseEventArgs e)
        {
            HTuple row, column, button;
            HOperatorSet.GetMposition(windowID, out row, out column, out button);
            rowDown = row;    //鼠标按下时的行坐标
            colDown = column; //鼠标按下时的列坐标
        }

        public HTuple windowID, imageWidth, imageHeight;
        private double rowDown;//鼠标按下时的行坐标
        private double colDown;//鼠标按下时的列坐标
        public HObject ho_image;      //图像变量
        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)//普通版halcon能处理的图像最大尺寸是32K*32K。如果无限缩小原图像，导致显示的图像超出限制，则会造成程序崩溃
            {
                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);
            }
        }
    }
}

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总结

以上就是halcon入门的第一节了，安装与dll库引用，控件的引入。