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MainWindowViewModel.cs
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MainWindowViewModel.cs
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using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.CompilerServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
namespace YoloMarkNet
{
public class Image : Notifier
{
private bool _isSelected;
public string Path { get; set; }
public ImageSource Thumb { get; set; }
public bool IsSelected
{
get { return _isSelected; }
set { _isSelected = value; NotifyPropertyChanged(); }
}
}
public class BoundingBox : Notifier
{
public BoundingBox(Rect rect, Class c) { this.rect = rect; Class = c; }
private Rect rect;
public Class Class { get; }
public double X
{
get { return rect.X; }
set
{
rect.X = value;
NotifyPropertyChanged();
}
}
public double Y
{
get { return rect.Y; }
set
{
rect.Y = value;
NotifyPropertyChanged();
}
}
public double Width
{
get { return rect.Width; }
set
{
rect.Width = value;
NotifyPropertyChanged();
}
}
public double Height
{
get { return rect.Height; }
set
{
rect.Height = value;
NotifyPropertyChanged();
}
}
}
public class Class
{
public Class(string desc, Brush color)
{
ClassDescriptor = desc;
Color = color;
}
public string ClassDescriptor { get; }
public Brush Color { get; }
}
public class MainWindowViewModel : Notifier
{
private ImageSource _selectedImageSource;
private Class _selectedClass;
private bool _isMouseDown;
private Rect _ghost;
public Rect Ghost
{
get { return _ghost; }
set { _ghost = value; NotifyPropertyChanged(); }
}
public bool IsMouseDown
{
get { return _isMouseDown; }
set { _isMouseDown = value; NotifyPropertyChanged(); }
}
public IList<Class> Classes { get; }
public IList<Image> Images { get; }
public IList<Brush> Colors { get; }
public ObservableCollection<BoundingBox> BoundingBoxes { get; } = new ObservableCollection<BoundingBox>();
public bool IsLastImage => SelectedImage == Images.Last();
public Image SelectedImage
{
get { return Images.FirstOrDefault(f => f.IsSelected); }
set
{
SelectedImageSource = null;
foreach (var image in Images)
{
if (image == value)
{
image.IsSelected = true;
SelectedImageSource = LoadImage(image.Path);
}
else
{
image.IsSelected = false;
}
}
BoundingBoxes.Clear();
var path = SelectedImage.Path.Substring(0, SelectedImage.Path.Length - 4) + ".txt";
if (File.Exists(path))
{
var boundingBoxes = File.ReadAllLines(path);
foreach (var bb in boundingBoxes)
{
var split = bb.Split(' ');
var x = double.Parse(split[1]) * SelectedImageSource.Width;
var y = double.Parse(split[2]) * SelectedImageSource.Height;
var w = double.Parse(split[3]) * SelectedImageSource.Width;
var h = double.Parse(split[4]) * SelectedImageSource.Height;
var classIdx = int.Parse(split[0]);
var rect = new Rect(x, y, w, h);
BoundingBoxes.Add(new BoundingBox(rect, Classes[classIdx]));
}
}
NotifyPropertyChanged();
NotifyPropertyChanged(nameof(IsLastImage));
}
}
public ImageSource SelectedImageSource
{
get { return _selectedImageSource; }
set { _selectedImageSource = value; NotifyPropertyChanged(); }
}
public Class SelectedClass
{
get { return _selectedClass; }
set { _selectedClass = value; NotifyPropertyChanged(); }
}
public MainWindowViewModel()
{
System.IO.Directory.CreateDirectory("data\\img");
//Fix design time errors
if (DesignerProperties.GetIsInDesignMode(new System.Windows.DependencyObject())) return;
Classes = System.IO.File.ReadAllText("data\\obj.names")
.Split('\n')
.Select(f => new Class(f.Trim(), GetPseudorandomBrush()))
.ToList();
Images = System.IO.Directory.GetFiles("data\\img", "*.jpg").Select(f => new Image()
{
Path = f,
Thumb = LoadImage(f, true)
}).ToList();
SelectedImage = Images.FirstOrDefault();
if(SelectedImage == null)
{
MessageBox.Show("No images found, please place images into data/img/");
Application.Current.MainWindow.Close();
return;
}
var data = "";
foreach (var img in Images) data += $"{img.Path}{Environment.NewLine}";
File.WriteAllText("data\\train.txt", data);
SelectedClass = Classes.FirstOrDefault();
if(SelectedClass == null)
{
MessageBox.Show("No classes found, please enter classes into data/obj.names");
Application.Current.MainWindow.Close();
return;
}
}
static Random seededRandom = new Random(694201337);
private Brush GetPseudorandomBrush()
{
var brushes = typeof(Brushes).GetProperties();
int random = seededRandom.Next(brushes.Length);
return (Brush)brushes[random].GetValue(null, null);
}
private ImageSource LoadImage(string path, bool thumb = false)
{
var src = new BitmapImage();
using (FileStream stream = File.OpenRead(path))
{
src.BeginInit();
src.StreamSource = stream;
src.CacheOption = BitmapCacheOption.OnLoad;
src.EndInit();
}
if (thumb)
{
var scaleX = 128f / src.PixelWidth;
var scaleY = 128f / src.PixelHeight;
return new TransformedBitmap(src, new ScaleTransform(scaleX, scaleY));
}
return src;
}
public void MouseMove(Point point)
{
Ghost = new Rect(mouseDownLocation, point);
}
private Point mouseDownLocation;
public void MouseDown(Point point)
{
IsMouseDown = true;
mouseDownLocation = point;
}
public void MouseUp(Point point)
{
if(IsMouseDown)
{
var rect = new Rect(mouseDownLocation, point);
BoundingBoxes.Add(new BoundingBox(rect, SelectedClass));
}
IsMouseDown = false;
}
public void MouseLeave()
{
IsMouseDown = false;
}
public ICommand SelectImageCommand => new Command(p =>
{
SaveCurrentImage();
SelectedImage = (Image)p;
});
public ICommand DeleteBoundingBoxCommand => new Command(p =>
{
BoundingBoxes.Remove((BoundingBox)p);
});
public ICommand SaveCommand => new Command(_ =>
{
SaveCurrentImage();
var currentImgIdx = Images.IndexOf(SelectedImage);
if (currentImgIdx < Images.Count - 1)
{
SelectedImage = Images[currentImgIdx + 1];
}
else
{
Application.Current.MainWindow.Close();
}
});
private void SaveCurrentImage()
{
var path = SelectedImage.Path.Substring(0, SelectedImage.Path.Length - 4) + ".txt";
var data = "";
foreach (var bb in BoundingBoxes)
{
var classIndex = Classes.IndexOf(bb.Class);
var scaledX = bb.X / SelectedImageSource.Width;
var scaledY = bb.Y / SelectedImageSource.Height;
var scaledWidth = bb.Width / SelectedImageSource.Width;
var scaledHeight = bb.Height / SelectedImageSource.Height;
data += $"{classIndex} {scaledX} {scaledY} {scaledWidth} {scaledHeight}{Environment.NewLine}";
}
File.WriteAllText(path, data);
}
}
}