using System;
using System.Drawing;
using System.IO;
using ImageFilter.Filters;
using ImageFilter.Noises;
using ImageFilter.Extensions;
using OxyPlot;
using OxyPlot.WindowsForms;
using OxyPlot.Axes;
using OxyPlot.Series;
using System.Collections.Generic;
namespace ImageFilter
{
public class ImageLoader : IDisposable
{
#region Fields
private bool isDisposed;
#endregion
#region Propeties
public Image Image { get; set; }
public string ImagePath { get; private set; }
#endregion
#region Methods
public double CalculatePSNR(Image image)
{
var img1 = (Bitmap) Image;
var img2 = (Bitmap) image;
int width = image.Width;
int height = image.Height;
double psnrY = 0;
using (var img1BMP = new ConcurrentBitmap(img1))
{
using (var img2BMP = new ConcurrentBitmap(img2))
{
// For each line
for (var y = 0; y < height; y++)
{
// For each pixel
for (var x = 0; x < width; x++)
{
Color img1Color = img1BMP.GetPixel(x, y);
// Assumes that img2 is not in Y component
Color tmpColor = img2BMP.GetPixel(x, y);
var I = (int) (tmpColor.R * 0.299
+ tmpColor.G * 0.587
+ tmpColor.B * 0.114);
Color img2Color = Color.FromArgb(I, I, I);
psnrY += Math.Pow(img1Color.R - img2Color.R, 2);
}
}
}
}
psnrY = 10 * Math.Log10(width * height * Math.Pow(Math.Pow(2, 8) - 1, 2) / psnrY);
/*Console.WriteLine($"Y: {psnrY}");*/
return psnrY;
}
public ImageLoader Load(string filePath)
{
var fileInfo = new FileInfo(filePath);
if (!fileInfo.Exists)
{
throw new FileNotFoundException(filePath);
}
ImagePath = filePath;
// Open a file stream
using (var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
var stream = new MemoryStream();
fileStream.CopyTo(stream);
stream.Position = 0;
Image = Image.FromStream(stream);
}
return this;
}
public ImageLoader Save(string filePath)
{
var dirInfo = new DirectoryInfo(Path.GetDirectoryName(filePath));
if (!dirInfo.Exists)
{
dirInfo.Create();
}
Image.Save(filePath);
return this;
}
public ImageLoader AddImage(Image I, double[,] img)
{
Bitmap one = (Bitmap) I;
//Bitmap two = (Bitmap) img;
Bitmap res = new Bitmap(one.Width, one.Height);
int height = Image.Height;
int width = Image.Width;
for (int y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
double blue;
double green;
double red = green = blue = 0;
Color colorOne = one.GetPixel(x, y);
int colorTwo = (int) img[y, x];//two.GetPixel(x, y);
red = colorOne.R + colorTwo;
green = colorOne.G + colorTwo;
blue = colorOne.B + colorTwo;
Color destinationColor = Color.FromArgb(
Convert.ToByte(red.Clamp(0, 255)),
Convert.ToByte(green.Clamp(0, 255)),
Convert.ToByte(blue.Clamp(0, 255)));
res.SetPixel(x, y, destinationColor);
}
}
Image = res;
return this;
}
public ImageLoader Add128(double[,] I)
{
Bitmap image = (Bitmap) Image;
Bitmap res = new Bitmap(Image.Width, Image.Height);
int height = Image.Height;
int width = Image.Width;
for (int y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
double blue;
double green;
double red = green = blue = 0;
red = I[y, x];// 128;
blue = I[y, x];// + 128;
green = I[y, x];//
red += 128;
blue += 128;
green += 128;
Color destinationColor = Color.FromArgb(
Convert.ToByte(red.Clamp(0, 255)),
Convert.ToByte(green.Clamp(0, 255)),
Convert.ToByte(blue.Clamp(0, 255)));
res.SetPixel(x, y, destinationColor);
}
}
Image = res;
return this;
}
public ImageLoader AddNoise(INoise noise)
{
Image = noise.ProcessPicture(this);
return this;
}
public ImageLoader AddBoxFilter(int size)
{
var boxFilter = new BoxFilter(size);
Image = boxFilter.ProcessPicture(this);
return this;
}
public ImageLoader AddGaussFilter(int size, double sigma)
{
var boxFilter = new GaussFilter(size, sigma);
Image = boxFilter.ProcessPicture(this);
return this;
}
public ImageLoader AddMedianFilter(int size)
{
var medianFilter = new MedianFilter(size);
Image = medianFilter.ProcessPicture(this);
return this;
}
public ImageLoader AddLaplacianFilter(double alpha)
{
var laplacianFilter = new LaplacianFilter(alpha);
Image = laplacianFilter.ProcessPicture(this);
return this;
}
public double[,] AddLaplacianFilterAlpha0()
{
var laplacianFilter = new LaplacianFilter(0);
double[,] res = laplacianFilter.ProcessPictureAlpha0(this);
return res;
}
public ImageLoader AddSobelFilter(string direction)
{
var sobelFilter = new SobelFilter(direction == "V" ? 1 : 0);
Image = sobelFilter.ProcessPicture(this);
return this;
}
public double[,] GetSobelFilterDouble(string direction)
{
var sobelFilter = new SobelFilter(direction == "V" ? 1 : 0);
return sobelFilter.Get(this);
}
public double CalculateAvgLuminocity()
{
double luminocity = 0;
Bitmap image = (Bitmap)Image;
int height = image.Height;
int width = image.Width;
for (int y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
luminocity += image.GetPixel(x, y).R;
}
}
return luminocity / (double) (height * width);
}
private SortedDictionary<int, int> GetFrequency()
{
Bitmap image = (Bitmap)Image;
int height = image.Height;
int width = image.Width;
var result = new SortedDictionary<int, int>();
for (int y = 0; y < height; y++)
{
for (var x = 0; x < width; x++)
{
int Y = image.GetPixel(x, y).R;
if (result.ContainsKey(Y))
{
result[Y] = result[Y] + 1;
} else
{
result.Add(Y, 1);
}
}
}
return result;
}
public void PlotHistogram(string name, string outputPath, FileInfo fileInfo)
{
PngExporter pngExporter = new PngExporter { Width = 1280, Height = 720, Background = OxyColors.White };
var freq = GetFrequency();
var x = freq.Values;
var y = freq.Keys;
var plotGauss = new PlotModel { Title = $"Histogram for {name}" };
plotGauss.Axes.Add(new LinearAxis { Title = "x", Position = AxisPosition.Bottom });
plotGauss.Axes.Add(new LinearAxis { Title = "y", Position = AxisPosition.Left });
var barSeries = new LinearBarSeries
{
};
foreach (var item in freq)
{
barSeries.Points.Add(new DataPoint(item.Key, item.Value));
}
plotGauss.Series.Add(barSeries);
pngExporter.ExportToFile(plotGauss, $"{outputPath}/{fileInfo.Name}/histograms/{name}{fileInfo.Extension}");
}
#region Dispose
~ImageLoader()
{
Dispose(false);
}
public void Dispose()
{
Dispose(true);
// Already cleaned up in dispose method, supress GC
GC.SuppressFinalize(this);
}
private void Dispose(bool disposing)
{
if (isDisposed)
{
return;
}
if (disposing)
{
if (Image != null)
{
Image.Dispose();
Image = null;
}
}
isDisposed = true;
}
#endregion
#endregion
}
}