目录
C# OpenCvSharp Tracker 目标追踪
效果
项目
代码
using OpenCvSharp;
using OpenCvSharp.Extensions;
using OpenCvSharp.Tracking;
using System;
using System.Drawing;
using System.Reflection;
using System.Windows.Forms;
namespace C__OpenCvSharp_Tracker_目标追踪
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
string filename = "";
bool play = false;
Tracker tracker;
VideoCapture capture;
bool m_mouseDown = false;
bool m_mouseMove = false;
System.Drawing.Point startPoint = new System.Drawing.Point();
System.Drawing.Point endPoint = new System.Drawing.Point();
Mat currentFrame = new Mat();
Rect roi = new Rect();
private void Form1_Load(object sender, EventArgs e)
{
comboBox1.SelectedIndex = 0;
toolStripStatusLabel1.Text = "请打开视频文件";
label2.Text = "";
}
private void button1_Click(object sender, EventArgs e)
{
OpenFileDialog ofd = new OpenFileDialog();
ofd.Filter = "Video files (*.avi)|*.avi|MP4 files (*.mp4)|*.mp4";
ofd.RestoreDirectory = true;
ofd.CheckFileExists = true;
if (ofd.ShowDialog() == DialogResult.OK)
{
filename = ofd.FileName;
toolStripStatusLabel1.Text = filename;
capture = new VideoCapture(filename);
if (!capture.IsOpened())
{
toolStripStatusLabel1.Text = " 打开视频文件失败";
return;
}
capture.Read(currentFrame);
if (!currentFrame.Empty())
{
pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
timer1.Interval = (int)(1000.0 / capture.Fps);
timer1.Enabled = true;
m_mouseMove = false;
m_mouseDown = false;
pictureBox2.Image = null;
}
}
}
private void button2_Click(object sender, EventArgs e)
{
play = true;
if (pictureBox2.Image != null)
{
switch (comboBox1.SelectedIndex)
{
case 0:
default:
tracker = TrackerCSRT.Create();
break;
case 1:
tracker = TrackerGOTURN.Create();
break;
case 2:
tracker = TrackerKCF.Create();
break;
case 3:
tracker = TrackerMIL.Create();
break;
}
tracker.Init(currentFrame, roi);
}
}
private void button3_Click(object sender, EventArgs e)
{
play = false;
}
private void timer1_Tick(object sender, EventArgs e)
{
if (play)
{
capture.Read(currentFrame);
if (currentFrame.Empty())
{
play = false;
pictureBox1.Image = null;
pictureBox2.Image = null;
timer1.Enabled = false;
return;
}
if (pictureBox2.Image != null && tracker != null)
{
tracker.Update(currentFrame, ref roi);
Cv2.Rectangle(currentFrame, roi, Scalar.Red);
label2.Text = String.Format("ROI:({0},{1})-({2},{3})", roi.X, roi.Y, roi.X + roi.Width, roi.Y + roi.Height);
}
pictureBox1.Image = BitmapConverter.ToBitmap(currentFrame);
}
}
private void pictureBox1_Paint(object sender, PaintEventArgs e)
{
if (!m_mouseDown || !m_mouseMove)
return;
Graphics g = e.Graphics;
Pen p = new Pen(Color.Blue, 2);
Rectangle rect = new Rectangle(startPoint.X, startPoint.Y, (endPoint.X - startPoint.X), (endPoint.Y - startPoint.Y));
g.DrawRectangle(p, rect);
}
private void pictureBox1_MouseMove(object sender, MouseEventArgs e)
{
if (pictureBox1.Image == null)
return;
if (!m_mouseDown) return;
m_mouseMove = true;
endPoint = e.Location;
pictureBox1.Invalidate();
}
private void pictureBox1_MouseUp(object sender, MouseEventArgs e)
{
if (!m_mouseDown || !m_mouseMove)
return;
m_mouseDown = false;
m_mouseMove = false;
System.Drawing.Point image_startPoint = ConvertCooridinate(startPoint);
System.Drawing.Point image_endPoint = ConvertCooridinate(endPoint);
if (image_startPoint.X < 0)
image_startPoint.X = 0;
if (image_startPoint.Y < 0)
image_startPoint.Y = 0;
if (image_endPoint.X < 0)
image_endPoint.X = 0;
if (image_endPoint.Y < 0)
image_endPoint.Y = 0;
if (image_startPoint.X > currentFrame.Cols)
image_startPoint.X = currentFrame.Cols;
if (image_startPoint.Y > currentFrame.Rows)
image_startPoint.Y = currentFrame.Rows;
if (image_endPoint.X > currentFrame.Cols)
image_endPoint.X = currentFrame.Cols;
if (image_endPoint.Y > currentFrame.Rows)
image_endPoint.Y = currentFrame.Rows;
label2.Text = String.Format("ROI:({0},{1})-({2},{3})", image_startPoint.X, image_startPoint.Y, image_endPoint.X, image_endPoint.Y);
int w = (image_endPoint.X - image_startPoint.X);
int h = (image_endPoint.Y - image_startPoint.Y);
if (w > 10 && h > 10)
{
roi = new Rect(image_startPoint.X, image_startPoint.Y, w, h);
Mat roi_mat = currentFrame[roi];
pictureBox2.Image = BitmapConverter.ToBitmap(roi_mat);
}
}
private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
{
if (pictureBox1.Image == null)
return;
play = false;
m_mouseDown = true;
startPoint = e.Location;
}
private System.Drawing.Point ConvertCooridinate(System.Drawing.Point point)
{
System.Reflection.PropertyInfo rectangleProperty = this.pictureBox1.GetType().GetProperty("ImageRectangle", BindingFlags.Instance | BindingFlags.NonPublic);
Rectangle pictureBox = (Rectangle)rectangleProperty.GetValue(this.pictureBox1, null);
int zoomedWidth = pictureBox.Width;
int zoomedHeight = pictureBox.Height;
int imageWidth = pictureBox1.Image.Width;
int imageHeight = pictureBox1.Image.Height;
double zoomRatex = (double)(zoomedWidth) / (double)(imageWidth);
double zoomRatey = (double)(zoomedHeight) / (double)(imageHeight);
int black_left_width = (zoomedWidth == this.pictureBox1.Width) ? 0 : (this.pictureBox1.Width - zoomedWidth) / 2;
int black_top_height = (zoomedHeight == this.pictureBox1.Height) ? 0 : (this.pictureBox1.Height - zoomedHeight) / 2;
int zoomedX = point.X - black_left_width;
int zoomedY = point.Y - black_top_height;
System.Drawing.Point outPoint = new System.Drawing.Point();
outPoint.X = (int)((double)zoomedX / zoomRatex);
outPoint.Y = (int)((double)zoomedY / zoomRatey);
return outPoint;
}
}
}