Edge - Revision history

Anko at 07:05, 23 April 2015

2015-04-23T07:05:42Z

Anko: /* Edge detection */

2015-04-23T06:56:17Z

Edge detection

Anko at 06:55, 23 April 2015

2015-04-23T06:55:29Z

Anko at 21:35, 22 April 2015

2015-04-22T21:35:42Z

Anko: /* Edge detection */

2015-04-22T19:56:05Z

Edge detection

Anko at 14:43, 22 April 2015

2015-04-22T14:43:01Z

Anko at 14:42, 22 April 2015

2015-04-22T14:42:29Z

Anko: Created page with "

 im = imread("lena.tif");  Sy = [-1 -2 -1; 0 0 0; 1 2 1]; Sx = Sy';  Gr = im(:,:,1)*0.2+im(:,:,2)*0.7+im(:,:,3)*0.1;  DimY = conv2(Sy,Gr); DimX = conv2(Sx,Gr);  Dim..."


2015-04-22T14:19:34Z
Created page with "<code><pre> im = imread("lena.tif");  Sy = [-1 -2 -1; 0 0 0; 1 2 1]; Sx = Sy';  Gr = im(:,:,1)*0.2+im(:,:,2)*0.7+im(:,:,3)*0.1;  DimY = conv2(Sy,Gr); DimX = conv2(Sx,Gr);  Dim..."
New page
<code><pre>

im = imread("lena.tif");



Sy = [-1 -2 -1; 0 0 0; 1 2 1];

Sx = Sy';



Gr = im(:,:,1)*0.2+im(:,:,2)*0.7+im(:,:,3)*0.1;



DimY = conv2(Sy,Gr);

DimX = conv2(Sx,Gr);



DimYn = DimY./max(max(DimY));

DimXn = DimX./max(max(DimX));

figure

imshow(DimYn);

figure

imshow(DimXn);





Dim = (DimY.^2 + DimX.^2).^(1/2);

Dimn = Dim./max(max(Dim));

figure

imshow(Dimn)

figure

imshow(Dimn > 0.2)

</pre></code>

← Older revision		Revision as of 07:05, 23 April 2015
Line 167:		Line 167:
	using System.IO;		using System.IO;
	using System.Drawing.Imaging;		using System.Drawing.Imaging;
		+
		+	== background==
		+
		+	<code><pre>
		+	namespace WindowsFormsApplication1
		+	{
		+	public partial class Form1 : Form
		+	{
		+	public Form1()
		+	{
		+	InitializeComponent();
		+	}
		+
		+	private Capture cap = new Capture();
		+	Image<Bgr, byte> frame;
		+	Image<Bgr, byte> background;
		+	Image<Gray, byte> bOr;
		+	private Image<Gray, byte> mask;
		+	private Image<Gray, byte> maskI;
		+
		+	private DispatcherTimer timer = new DispatcherTimer();
		+
		+	private void Form1_Load(object sender, EventArgs e)
		+	{
		+	background = new Image<Bgr, byte>("C:/xxx/sunset.jpg");
		+	this.Size = new System.Drawing.Size(100, 100);
		+
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	frame = cap.QueryFrame();
		+	bOr = frame.Convert<Gray, byte>().PyrDown().PyrUp();
		+
		+	this.Size = frame.Size;
		+
		+
		+	mask = frame.Convert<Gray, byte>();
		+	maskI = frame.Convert<Gray, byte>();
		+
		+	background = background.Resize(frame.Size.Width, frame.Size.Height, Emgu.CV.CvEnum.INTER.CV_INTER_LINEAR);
		+
		+	timer.Tick += new EventHandler(timer_tick);
		+	timer.Interval = new TimeSpan(0, 0, 0, 0, 35);
		+	timer.Start();
		+	}
		+
		+	private Image<Gray, byte> gray;
		+	Image<Bgr, byte> combined;
		+
		+
		+	void timer_tick(object sender, EventArgs e)
		+	{
		+	frame = cap.QueryFrame();
		+	gray = frame.Convert<Gray, byte>();
		+
		+	mask.SetValue(0);
		+	maskI.SetValue(255);
		+
		+	gray = gray.PyrDown().PyrUp().AbsDiff(bOr);
		+	gray = gray.ThresholdBinary(new Gray(20), new Gray(255));
		+
		+	double largestarea = 0;
		+
		+	Contour<Point> largestContour = null;
		+	var sourceContours = gray.FindContours(Emgu.CV.CvEnum.CHAIN_APPROX_METHOD.CV_CHAIN_APPROX_NONE, Emgu.CV.CvEnum.RETR_TYPE.CV_RETR_LIST);
		+
		+	while (sourceContours != null)
		+	{
		+	if (largestarea < sourceContours.Area)
		+	{
		+	largestarea = sourceContours.Area;
		+	largestContour = sourceContours;
		+	}
		+	sourceContours = sourceContours.HNext;
		+	}
		+
		+	if (largestContour != null)
		+	{
		+	largestarea = largestContour.Area;
		+	mask.Draw(largestContour, new Gray(255), -1);
		+	maskI = maskI.Sub(mask);
		+
		+	combined = background.Copy(maskI);
		+	frame = frame.Copy(mask);
		+	frame = frame.Add(combined);
		+	}
		+
		+	pictureBox1.Image = frame.Bitmap;
		+
		+
		+	}
		+
		+	private void pictureBox1_Click(object sender, EventArgs e)
		+	{
		+
		+	}
		+
		+
		+	}
		+	}
		+	</pre>
		+	</code>

@@ Line 33: / Line 33: @@
 =====Edge detection=====
 namespace WindowsFormsApplication1
+{
@@ Line 123: / Line 125: @@
+     }
+}
 =====Objects detection=====

@@ Line 133: / Line 133: @@
 ==webcam==
 <!DOCTYPE html>
 <html>
@@ Line 156: / Line 157: @@
 </body>
 </html>
-Image MySystemImage = frame.ToBitmap();
+ using System.IO;
-            MySystemImage.Save("xxx.jpg", ImageFormat.Jpeg);
+ using System.Drawing.Imaging;

← Older revision		Revision as of 21:35, 22 April 2015
Line 130:		Line 130:

	==Change background==		==Change background==
		+
		+	==webcam==
		+
		+	<!DOCTYPE html>
		+	<html>
		+	<head>
		+
		+	<script type="text/javascript">
		+
		+	refreshImage = function()
		+	{
		+	img = document.getElementById("cam");
		+	img.src="xxx.jpg?"+Math.random();
		+	}
		+	</script>
		+
		+	<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
		+
		+	<title>Auto-Refresh</title>
		+
		+	</head>
		+
		+	<body onload="window.setInterval(refreshImage, 1*1000);">
		+	<img src="xxx.jpg?xxx" id="cam" />
		+	</body>
		+	</html>
		+
		+
		+	Image MySystemImage = frame.ToBitmap();
		+	MySystemImage.Save("xxx.jpg", ImageFormat.Jpeg);
		+
		+	using System.IO;
		+	using System.Drawing.Imaging;

← Older revision		Revision as of 19:56, 22 April 2015
Line 33:		Line 33:

	=====Edge detection=====		=====Edge detection=====
		+	namespace WindowsFormsApplication1
		+	{
		+	public partial class Form1 : Form
		+	{
		+	public Form1()
		+	{
		+	InitializeComponent();
		+	}
		+
		+	private DispatcherTimer timer = new DispatcherTimer();
		+
		+	private Capture cap = new Capture();
		+	Image<Bgr, byte> frame;
		+
		+	private void Form1_Load(object sender, EventArgs e)
		+	{
		+	this.Size = new System.Drawing.Size(100, 100);
		+	frame = cap.QueryFrame();
		+	this.Size = frame.Size;
		+
		+
		+
		+	}
		+
		+
		+	private void pictureBox1_Click(object sender, EventArgs e)
		+	{
		+	Bgr color = new Bgr(255, 0, 0);
		+	frame = new Image<Bgr, byte>(this.Size.Width, this.Size.Height, color);
		+
		+	pictureBox1.Image = frame.Bitmap;
		+
		+	Thread workerThread = new Thread(showImage);
		+	workerThread.Start();
		+
		+	}
		+
		+	private void button1_Click(object sender, EventArgs e)
		+	{
		+
		+
		+	}
		+
		+	void showImage()
		+	{
		+	MCvFont font = new MCvFont(Emgu.CV.CvEnum.FONT.CV_FONT_HERSHEY_PLAIN, 10.0, 10.0);
		+
		+	Bgr color = new Bgr(255, 255, 255);
		+	Bgr Bcolor = new Bgr(255, 0, 0);
		+
		+	frame = new Image<Bgr, byte>(frame.Size.Width, frame.Size.Height, Bcolor);
		+
		+	frame.Draw("0", ref font, new Point(250, 250), color);
		+	pictureBox1.Image = frame.Bitmap;
		+	System.Threading.Thread.Sleep(1000);
		+
		+	frame = new Image<Bgr, byte>(frame.Size.Width, frame.Size.Height, Bcolor);
		+	frame.Draw("1", ref font, new Point(250, 250), color);
		+	pictureBox1.Image = frame.Bitmap;
		+	System.Threading.Thread.Sleep(1000);
		+
		+
		+	frame = new Image<Bgr, byte>(frame.Size.Width, frame.Size.Height, Bcolor);
		+	frame.Draw("2", ref font, new Point(250, 250), color);
		+	pictureBox1.Image = frame.Bitmap;
		+	System.Threading.Thread.Sleep(1000);
		+
		+	frame = cap.QueryFrame();
		+	pictureBox1.Image = frame.Bitmap;
		+	System.Threading.Thread.Sleep(1000);
		+
		+
		+	timer.Tick += new EventHandler(timer_tick);
		+	timer.Interval = new TimeSpan(0, 0, 0, 0, 35);
		+	timer.Start();
		+
		+
		+	}
		+
		+	void timer_tick(object sender, EventArgs e)
		+	{
		+	frame = cap.QueryFrame();
		+	Image<Gray, Byte> cannyEdges = frame.Convert<Gray, Byte>().Canny(100, 60);//cannyThreshold, cannyThresholdLinking);
		+	pictureBox1.Image = cannyEdges.Bitmap;
		+	}
		+
		+
		+
		+	}
		+	}

	=====Objects detection=====		=====Objects detection=====