C#/halcon图像滚轮缩放
2021/8/23 17:06:10
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分类专栏: # Halcon
版权 Halcon 专栏收录该内容 39 篇文章 3 订阅 订阅专栏-
初始化窗口
1)图片控件为winform中的PictureBox控件时:
需要调用halcon算子OpenWindow来初始化窗口,使winform中的图片窗口转换为适用于halcon的图片窗口。
2)图片控件为halcon中的HWindowControl控件时:
无需进行窗口转换,可直接按照如下方式调用。
WindowID = hWindowControl1.HalconWindow。
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添加图像缩放功能
打开Form窗体——查看图片控件属性——点击“事件”选项——找到鼠标滚轮滑动的事件,双击创建响应函数——将相应的代码放在刚刚添加的函数中,如下图所示:
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添加图像平移功能
按照上述步骤分别找到鼠标“按下”与“抬起”的事件,分别双击创建响应函数,然后将相应的代码放在刚刚添加的函数中。如下图所示:
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添加实时显示灰度值功能
按照上述步骤找到鼠标移动的事件,双击创建响应函数——在界面上添加一个“label”控件,然后将相应的代码放在刚刚添加的函数中。
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代码:
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 CSharpAndHalcon12 { public partial class Form1 : Form { 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 HObject ho_image; //图像变量 public Form1() { InitializeComponent(); CreateHalconWindow(); } //创建Halcon窗口 public void CreateHalconWindow() { // ///图片控件为winform中的PictureBox控件时/ //HTuple FatherWindow = this.hWindowControl1.Handle; //HOperatorSet.SetWindowAttr("background_color", "green"); //HOperatorSet.OpenWindow(0, 0, this.hWindowControl1.Width, this.hWindowControl1.Height, FatherWindow, "visible", "", out WindowID); /图片控件为halcon中的HWindowControl控件时/ WindowID = hWindowControl1.HalconWindow; } //读图 private void button1_Click(object sender, EventArgs e) { OpenFileDialog openFileDialog = new OpenFileDialog(); //openFileDialog.Filter = "JPEG文件|*.jpg*|BMP文件|*.bmp*|TIFF文件|*.tiff*"; openFileDialog.Filter = "所有图像文件 | *.bmp; *.pcx; *.png; *.jpg; *.gif;*.tif; *.ico; *.dxf; *.cgm; *.cdr; *.wmf; *.eps; *.emf"; if (openFileDialog.ShowDialog() == DialogResult.OK) { HTuple ImagePath = openFileDialog.FileName; HOperatorSet.ReadImage(out ho_image, ImagePath); } HOperatorSet.GetImageSize(ho_image, out ImageWidth, out ImageHeight); HOperatorSet.SetPart(WindowID, 0, 0, ImageHeight, ImageWidth); HOperatorSet.DispObj(ho_image, WindowID); } //缩放图像 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); } } //鼠标按下,记录当前坐标值 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 } //鼠标抬起,实现图像移动 private void hWindowControl1_HMouseUp(object sender, HMouseEventArgs e) { 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 { MessageBox.Show("请加载一张图片"); } } //鼠标移动,实时显示当前坐标与灰度值 private void hWindowControl1_HMouseMove(object sender, HMouseEventArgs e) { 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; //在label控件上显示数值 } //全屏显示图像,使缩放后的图像回到原始大小 private void button_FullWindow_Click(object sender, EventArgs e) { HOperatorSet.SetPart(WindowID, 0, 0, ImageHeight - 1, ImageWidth - 1); HOperatorSet.ClearWindow(WindowID); HOperatorSet.DispObj(ho_image, WindowID); } } }
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