第一个C# Winform实例
前面我们准备好了相关的库,现在开始搭建环境,本人自动化行业,就用Windorm开发吧,例子仅仅做引导,希望大家能深入。VS版本VS2017
1:打开VS建立一个WInform 项目。拉入两个控件,groupbox,picturebox放到左侧,右侧也拉入一个groupbox,里面放入两个button.一个用来选择图片,一个用来测试二值化的效果。UI效果如下:
2:本人系统win10,64位。所以用OpencvSharp的64位库。先在项目里添加引用:(net461版本);然后在类里添加 using OpenCvSharp;最后根据个人项目平台,选择新建X64或者X86,用anycpu 容易出问题。好了,经过上面的准备,OpencvSharp相关库所有的东西都可以调用了。
3:图像少不了显示,我们新建一个类,用来管理OpencvSharp的图片显示。
public class SharpWindows { [DllImport("user32.dll", SetLastError = true)] private static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", SetLastError = true)] private static extern int SetParent(IntPtr hWndChild, IntPtr hWndNewParent); private PictureBox pictureBox; private Control Parentform; public Window Opencvwin; public SharpWindows(PictureBox _pictureBox,string winname) { pictureBox = _pictureBox; Cv2.NamedWindow(winname); Opencvwin = new Window(winname, WindowMode.FullScreen); Cv2.SetWindowProperty(Opencvwin.Name, WindowProperty.Fullscreen, 1); IntPtr Childwin = FindWindow(null, winname); SetParent(Childwin, _pictureBox.Handle); Parentform = Control.FromHandle(_pictureBox.Handle); } public void Showimg(Mat img) { try { int width = Parentform.Width; int height = Parentform.Height; Cv2.ResizeWindow(Opencvwin.Name, width, height); Cv2.MoveWindow(Opencvwin.Name, Parentform.Left, Parentform.Top); Cv2.SetWindowProperty(Opencvwin.Name, WindowProperty.Fullscreen, 1); Opencvwin.ShowImage(img); } catch(Exception ex) { throw (ex); } } }
4.在winform主UI里面初始化一个OpencvSharp的显示窗口:(同时创建一个Mat变量)
1 2 3 4 5 6 7 | SharpWindows Imgwindow; Mat rawimg; public OpencvSharpWindow() { InitializeComponent(); Imgwindow = new SharpWindows( this .pictureBox1, "MainUIwindow" ); } |
5.两个button点击事件:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 | private void button_Openpic_Click( object sender, EventArgs e) { try { var filename= OpenfileDlg(); if (filename!= null && filename!= "" ) { Mat img = Cv2.ImRead(filename); Imgwindow.Showimg(img); rawimg = img.Clone(); img.Dispose(); } } catch (Exception ex ) { throw (ex); } } private static string OpenfileDlg( string Defaultpath = null ) { OpenFileDialog ofd = new OpenFileDialog(); ofd.Title = "请选择要打开的文件" ; //多选 ofd.Multiselect = true ; //初始目录 ofd.InitialDirectory = Defaultpath; //设定文件类型 // ofd.Filter = "*.bmp | *.jpg"; ofd.ShowDialog(); //获得在打开文件对话框中选择的文件的路径 string path = ofd.FileName; return path; } private void button_Test_Click( object sender, EventArgs e) { try { if (rawimg!= null ) { //转灰度 Mat grayimg; if (rawimg.Channels()==3) { grayimg = rawimg.CvtColor(ColorConversionCodes.BGR2GRAY); } else { grayimg = rawimg.Clone(); } Imgwindow.Showimg(grayimg); //bin double dvalue = 0; double .TryParse(textBox_ThreshValue.Text, out dvalue); if (dvalue==0) { dvalue = 10; } Mat binimg = grayimg.Threshold(dvalue, 255, ThresholdTypes.Binary); Imgwindow.Showimg(binimg); grayimg.Dispose(); binimg.Dispose(); } } catch (Exception ex) { throw (ex); } } |
6.代码敲完。剩下我们测试一下效果:运行前,需要将对应的下面两个dll :OpenCvSharpExtern.dll和opencv_videoio_ffmpeg411.dll这2个运行时复制到可执行目录即可,根据运行平台,有X86和X64 两种,需要注意一下。
点击打开图片按钮,选择需要显示的图片,我网上下载了一张,UI那里就有显示了,还是很直观方便的。
接着我们测试一下简单的二值化效果。在text文本框里分别填入50,100,200,220效果分别如下:
本次实例结束。希望大家动手操作,这样才能学习到东西。
各位,如果需要我的源码,请留言,谢谢!
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