用Visual C＃开发基于OpenCV的Windows应用程序

http://blog.163.com/wangxh_jy/blog/static/28233883201001581640283/

关于详细的配置及程序运行截图，请下载：http://download.csdn.net/source/1127474名为《用Visual C＃开发基于OpenCV的Windows应用程序》的文章。

由于百度允许的字数太少了，所以就不贴全部程序了。有需要源程序的话，请下载：http://download.csdn.net/source/1127477

下面是主要的程序：

?using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using Emgu.CV;

using Emgu.Util;

/*

*1、判断一个视频是否读到文件尾，不能用null，要用一个为空类型的IntPtr，就是IntPtr eof = new IntPtr()，看其是否与eof相等

*2、IplImage*,CvCapture*等指针在C#中都用IntPtr来代替，且其中没有cvGetMCvSize函数，故用cvGetImageROI来暂时代替

*3、由于C#中没有取地址符号&，所以在这里所有的取地址都用引用来代替，即ref

*4、OpenCV中的所有的预定义的常量，都封装在Emgu.CV.CvEnum这个枚举类型里面

*/

namespace OpenCV

{

public partial class mainForm : Form

{

IntPtr eof = new IntPtr();

public mainForm()

{

InitializeComponent();

}

private void btnOpen_Click(object sender, EventArgs e)

{

OpenFileDialog ofd = new OpenFileDialog();

ofd.DefaultExt = "*.bmp";

ofd.Filter="BMP files(*.bmp)|*.bmp|JPG files(*.jpg)|*.jpg|AVI files(*.avi)|*.avi";

if(ofd.ShowDialog()==DialogResult.OK)

{

tbxPath.Text = ofd.FileName;

}

else

{

tbxPath.Text = "";

}

}

private void btnOpenImage_Click(object sender, EventArgs e)

{

string path = tbxPath.Text;

if(path=="")

{

MessageBox.Show("Please select an image at first.","Information");

return;

}

else

{

string ext = path.Substring(path.Length - 3,3);

ext = ext.ToLower();

ext = ext.Trim();

if (ext.CompareTo("bmp") != 0 && ext.CompareTo("jpg")!=0)

{

MessageBox.Show("You must select an .bmp or .jpg file at first.", "Information");

return;

}

IntPtr img = CvInvoke.cvLoadImage(path,Emgu.CV.CvEnum.LOAD_IMAGE_TYPE.CV_LOAD_IMAGE_ANYCOLOR);

if(img==eof)

{

MessageBox.Show("Can not open the image.", "Information");

return;

}

CvInvoke.cvNamedWindow(path);

CvInvoke.cvShowImage(path, img);

CvInvoke.cvWaitKey(0);

CvInvoke.cvReleaseImage(ref img);

CvInvoke.cvDestroyWindow(path);

}

}

private void btnOpenAVI_Click(object sender, EventArgs e)

{

string path = tbxPath.Text;

if(path=="")

{

MessageBox.Show("Please select an AVI file at first.", "Information");

return;

}

string ext = path.Substring(path.Length - 3);

ext = ext.ToLower();

ext = ext.Trim();

if(ext.CompareTo("avi")!=0)

{

MessageBox.Show("You must select an AVI file at first.", "Information");

return;

}

IntPtr capture = CvInvoke.cvCreateFileCapture(path);

if(capture==eof)

{

MessageBox.Show("Can not create file capture.", "Information");

return;

}

IntPtr frame;

CvInvoke.cvNamedWindow(path);

double fps = CvInvoke.cvGetCaptureProperty(capture, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS);

while((frame= CvInvoke.cvQueryFrame(capture))!=eof)

{

CvInvoke.cvShowImage(path,frame);

int ch=CvInvoke.cvWaitKey(1000/(int)fps);

if(ch==13) break;

}

CvInvoke.cvReleaseCapture(ref capture);

CvInvoke.cvDestroyWindow(path);

}

private void btnOpenCamera_Click(object sender, EventArgs e)

{

IntPtr capture = CvInvoke.cvCreateCameraCapture(-1);

if(capture==eof)

{

MessageBox.Show("Can not create camera capture.", "Information");

return;

}

IntPtr frame;

CvInvoke.cvNamedWindow("Camera");

while((frame=CvInvoke.cvQueryFrame(capture))!=eof)

{

CvInvoke.cvShowImage("Camera", frame);

int ch = CvInvoke.cvWaitKey(10);

if (ch == 13) break;

}

CvInvoke.cvReleaseCapture(ref capture);

CvInvoke.cvDestroyWindow("Camera");

}

private void btnSaveImage_Click(object sender, EventArgs e)

{

string txt = tbxPath.Text;

string path;

if(txt=="")

{

MessageBox.Show("Please select an image at first.", "Information");

return;

}

IntPtr oldImg = CvInvoke.cvLoadImage(txt, Emgu.CV.CvEnum.LOAD_IMAGE_TYPE.CV_LOAD_IMAGE_ANYCOLOR);

if(oldImg==eof)

{

MessageBox.Show("can not load the image.", "Information");

return;

}

SaveFileDialog sfd = new SaveFileDialog();

sfd.Filter = "BMP files(*.bmp)|*.bmp|JPG files(*.jpg)|*.jpg";

sfd.DefaultExt = "*.bmp";

if(sfd.ShowDialog()==DialogResult.OK)

{

path = sfd.FileName;

}

else

{

CvInvoke.cvReleaseImage(ref oldImg);

return;

}

CvInvoke.cvSaveImage(path, oldImg);

CvInvoke.cvReleaseImage(ref oldImg);

MessageBox.Show("Saved As the image successfully.","Information");

}

private void btnRgbToGray_Click(object sender, EventArgs e)

{

string path = tbxPath.Text;

if (path == "")

{

MessageBox.Show("Please select an image at first.", "Information");

return;

}

string ext = path.Substring(path.Length - 3, 3);

ext = ext.ToLower();

ext = ext.Trim();

if (ext.CompareTo("bmp") != 0 && ext.CompareTo("jpg") != 0)

{

MessageBox.Show("You must select an .bmp or .jpg file at first.", "Information");

return;

}

IntPtr oldImg = CvInvoke.cvLoadImage(path, Emgu.CV.CvEnum.LOAD_IMAGE_TYPE.CV_LOAD_IMAGE_ANYCOLOR);

if(oldImg==eof)

{

MessageBox.Show("can not load the image:" + path, "Information");

return;

}

MCvRect cr = CvInvoke.cvGetImageROI(oldImg);

int width = cr.width;

int height = cr.height;

IntPtr grayImg = CvInvoke.cvCreateImage(new MCvSize(width,height), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U,1);

if(grayImg==eof)

{

MessageBox.Show("can not create an image in memory.", "Information");

return;

}

CvInvoke.cvCvtColor(oldImg, grayImg, Emgu.CV.CvEnum.COLOR_CONVERSION.CV_BGR2GRAY);

CvInvoke.cvNamedWindow("灰度图");

CvInvoke.cvShowImage("灰度图", grayImg);

CvInvoke.cvWaitKey(0);

CvInvoke.cvReleaseImage(ref oldImg);

CvInvoke.cvReleaseImage(ref grayImg);

CvInvoke.cvDestroyWindow("灰度图");

}

private void btnCannyImg_Click(object sender, EventArgs e)

{

string path = tbxPath.Text;

if (path == "")

{

MessageBox.Show("Please select an image at first.", "Information");

return;

}

string ext = path.Substring(path.Length - 3, 3);

ext = ext.ToLower();

ext = ext.Trim();

if (ext.CompareTo("bmp") != 0 && ext.CompareTo("jpg") != 0)

{

MessageBox.Show("You must select an .bmp or .jpg file at first.", "Information");

return;

}

IntPtr srcImg = CvInvoke.cvLoadImage(path, Emgu.CV.CvEnum.LOAD_IMAGE_TYPE.CV_LOAD_IMAGE_GRAYSCALE);

if(srcImg==eof)

{

MessageBox.Show("Can not load the image:" + path, "Information");

return;

}

MCvRect crect = CvInvoke.cvGetImageROI(srcImg);

IntPtr dstImg = CvInvoke.cvCreateImage(new MCvSize(crect.width, crect.height), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);

int sobel;

double thresh1, thresh2;

CannyWindow cw = new CannyWindow();

cw.ShowDialog();

sobel = cw.sobel;

thresh1 = cw.thresh1;

thresh2 = cw.thresh2;

if (thresh1 == 0 || thresh2 == 0 || sobel == 0) return;

CvInvoke.cvCanny(srcImg, dstImg, thresh1, thresh2, sobel);

CvInvoke.cvNamedWindow("Canny检测");

CvInvoke.cvShowImage("Canny检测", dstImg);

CvInvoke.cvWaitKey(0);

CvInvoke.cvReleaseImage(ref srcImg);

CvInvoke.cvReleaseImage(ref dstImg);

CvInvoke.cvDestroyWindow("Canny检测");

}

private void btnGrayVideo_Click(object sender, EventArgs e)

{

string path = tbxPath.Text;

if (path == "")

{

MessageBox.Show("Please select an AVI file at first.", "Information");

return;

}

string ext = path.Substring(path.Length - 3, 3);

ext = ext.ToLower();

ext = ext.Trim();

if (ext.CompareTo("avi") != 0)

{

MessageBox.Show("You must select an .avi file at first.", "Information");

return;

}

IntPtr capture = CvInvoke.cvCreateFileCapture(path);

if(capture==eof)

{

MessageBox.Show("can not create file capture:" + path, "Information");

return;

}

IntPtr frame=CvInvoke.cvQueryFrame(capture);

if(frame==eof)

{

MessageBox.Show("can not query frame from the capture.", "Information");

return;

}

MCvRect c = CvInvoke.cvGetImageROI(frame);

IntPtr gray = CvInvoke.cvCreateImage(new MCvSize(c.width, c.height), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);

CvInvoke.cvNamedWindow("灰度视频");

while((frame=CvInvoke.cvQueryFrame(capture))!=eof)

{

CvInvoke.cvCvtColor(frame, gray, Emgu.CV.CvEnum.COLOR_CONVERSION.CV_BGR2GRAY);

CvInvoke.cvFlip(gray, gray, 0);

CvInvoke.cvShowImage("灰度视频", gray);

int ch = CvInvoke.cvWaitKey(10);

if (ch == 13) break;

}

CvInvoke.cvReleaseCapture(ref capture);

CvInvoke.cvReleaseImage(ref gray);

CvInvoke.cvDestroyWindow("灰度视频");

}

private void btnGrayCamera_Click(object sender, EventArgs e)

{

IntPtr capture = CvInvoke.cvCreateCameraCapture(-1);

if(capture==eof)

{

MessageBox.Show("can not create camera capture.", "Information");

return;

}

IntPtr frame = CvInvoke.cvQueryFrame(capture);

if(frame==eof)

{

MessageBox.Show("can not query frame from capture.", "Information");

return;

}

MCvRect c = CvInvoke.cvGetImageROI(frame);

IntPtr gray = CvInvoke.cvCreateImage(new MCvSize(c.width, c.height), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);

CvInvoke.cvNamedWindow("灰度摄像头");

while ((frame = CvInvoke.cvQueryFrame(capture)) != eof)

{

CvInvoke.cvCvtColor(frame, gray, Emgu.CV.CvEnum.COLOR_CONVERSION.CV_BGR2GRAY);

CvInvoke.cvFlip(gray, gray, 0);

CvInvoke.cvShowImage("灰度摄像头", gray);

int ch = CvInvoke.cvWaitKey(10);

if (ch == 13) break;

}

CvInvoke.cvReleaseCapture(ref capture);

CvInvoke.cvReleaseImage(ref gray);

CvInvoke.cvDestroyWindow("灰度摄像头");

}

private void btnCannyVideo_Click(object sender, EventArgs e)

{

string path = tbxPath.Text;

if (path == "")

{

MessageBox.Show("Please select an AVI file at first.", "Information");

return;

}

string ext = path.Substring(path.Length - 3, 3);

ext = ext.ToLower();

ext = ext.Trim();

if (ext.CompareTo("avi") != 0)

{

MessageBox.Show("You must select an .avi file at first.", "Information");

return;

}

IntPtr capture = CvInvoke.cvCreateFileCapture(path);

if(capture==eof)

{

MessageBox.Show("can not create file capture:" + path, "Information");

return;

}

IntPtr frame = CvInvoke.cvQueryFrame(capture);

if(frame==eof)

{

MessageBox.Show("can not query frame from capture.", "Information");

return;

}

MCvRect c = CvInvoke.cvGetImageROI(frame);

IntPtr gray = CvInvoke.cvCreateImage(new MCvSize(c.width, c.height), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);

IntPtr canny = CvInvoke.cvCreateImage(new MCvSize(c.width, c.height), Emgu.CV.CvEnum.IPL_DEPTH.IPL_DEPTH_8U, 1);

int sobel;

double thresh1, thresh2;

CannyWindow cw = new CannyWindow();

cw.ShowDialog();

sobel = cw.sobel;

thresh1 = cw.thresh1;

thresh2 = cw.thresh2;

if (thresh1 == 0 || thresh2 == 0 || sobel == 0) return;

double fps = CvInvoke.cvGetCaptureProperty(capture, Emgu.CV.CvEnum.CAP_PROP.CV_CAP_PROP_FPS);

CvInvoke.cvNamedWindow("Canny检测");

while ((frame = CvInvoke.cvQueryFrame(capture)) != eof)

{

CvInvoke.cvCvtColor(frame, gray, Emgu.CV.CvEnum.COLOR_CONVERSION.CV_BGR2GRAY);

CvInvoke.cvCanny(gray, canny, thresh1,thresh2,sobel);

CvInvoke.cvFlip(canny, canny, 0);

CvInvoke.cvShowImage("Canny检测", canny);

int ch = CvInvoke.cvWaitKey(1000/(int)fps);

if (ch == 13) break;

}

CvInvoke.cvReleaseCapture(ref capture);

CvInvoke.cvReleaseImage(ref gray);

CvInvoke.cvReleaseImage(ref canny);

CvInvoke.cvDestroyWindow("Canny检测");

}