/// <summary>
/// Perfoms a median filter on the specified image
/// </summary>
/// <param name="image">The image.</param>
/// <param name="size">The size (pixels squared) of the area to take the median of.</param>
/// <returns>The filtered median</returns>
public static Image BlurFilter(Image image, int size)
{
var sourceBitmap = new Bitmap(image);
var medianBitmap = new Bitmap(image.Width, image.Height);
var apetureMin = -(size / 2);
var apetureMax = (size / 2);
var medianFastBitmap = new BitmapAccessor(medianBitmap);
var sourceFastBitmap = new BitmapAccessor(sourceBitmap);
for (var x = 0; x < medianBitmap.Width; x++)
{
for (var y = 0; y < medianBitmap.Height; y++)
{
var rValue = 0;
var gValue = 0;
var bValue = 0;
var pixelCount = 0;
for (var currentX = x + apetureMin; currentX < x + apetureMax; currentX++)
{
if (currentX < 0 || currentX >= medianBitmap.Width)
{
continue;
}
for (var currentY = y + apetureMin; currentY < y + apetureMax; currentY++)
{
if (currentY < 0 || currentY >= medianBitmap.Height)
{
continue;
}
var currentColor = sourceFastBitmap.GetPixel(currentX, currentY);
rValue += currentColor.R;
gValue += currentColor.G;
bValue += currentColor.B;
pixelCount++;
}
}
var medianColor = Color.FromArgb(rValue / pixelCount,
gValue / pixelCount,
bValue / pixelCount);
medianFastBitmap.SetPixel(x, y, medianColor);
}
}
medianFastBitmap.Dispose();
sourceFastBitmap.Dispose();
sourceBitmap.Dispose();
return(medianBitmap);
}
public async virtual Task <Bitmap> GetStaticMapImage(string region, int polygonMultiplier, int width, int height)
{
try
{
string geoJSON = await Geocoder.GetGeoJsonByName(region);
string geoImageURL = LinkFormatter.GetImageStringURL(geoJSON, polygonMultiplier, width, height);
Bitmap image = await BitmapAccessor.Download(geoImageURL);
return(image);
}
catch { return(null); }
}
public static Image DarkenImage(Image image, double darkenAmount)
{
var sourceBitmap = new Bitmap(image);
var destBitmap = new Bitmap(image.Width, image.Height);
var destFastBitmap = new BitmapAccessor(destBitmap);
var sourceFastBitmap = new BitmapAccessor(sourceBitmap);
for (var x = 0; x < destBitmap.Width; x++)
{
for (var y = 0; y < destBitmap.Height; y++)
{
var color = sourceFastBitmap.GetPixel(x, y);
destFastBitmap.SetPixel(x, y, DarkenColor(color, darkenAmount));
}
}
destFastBitmap.Dispose();
sourceFastBitmap.Dispose();
sourceBitmap.Dispose();
return(destBitmap);
}
/// <summary>
/// Perfoms a median filter on the specified image
/// </summary>
/// <param name="image">The image.</param>
/// <param name="size">The size (pixels squared) of the area to take the median of.</param>
/// <returns>The filtered median</returns>
public static Image BlurFilter(Image image, int size)
{
Bitmap sourceBitmap = new Bitmap(image);
Bitmap medianBitmap = new Bitmap(image.Width, image.Height);
int apetureMin = -(size / 2);
int apetureMax = (size / 2);
Color medianColor;
Color currentColor;
int rValue = 0;
int gValue = 0;
int bValue = 0;
int pixelCount = 0;
var medianFastBitmap = new BitmapAccessor(medianBitmap);
var sourceFastBitmap = new BitmapAccessor(sourceBitmap);
for (int x = 0; x < medianBitmap.Width; x++)
{
for (int y = 0; y < medianBitmap.Height; y++)
{
rValue = 0;
gValue = 0;
bValue = 0;
pixelCount = 0;
for (int currentX = x + apetureMin; currentX < x + apetureMax; currentX++)
{
if (currentX >= 0 && currentX < medianBitmap.Width)
{
for (int currentY = y + apetureMin; currentY < y + apetureMax; currentY++)
{
if (currentY >= 0 && currentY < medianBitmap.Height)
{
currentColor = sourceFastBitmap.GetPixel(currentX, currentY);
rValue += currentColor.R;
gValue += currentColor.G;
bValue += currentColor.B;
pixelCount++;
}
}
}
}
medianColor = Color.FromArgb(rValue / pixelCount,
gValue / pixelCount,
bValue / pixelCount);
medianFastBitmap.SetPixel(x, y, medianColor);
}
}
medianFastBitmap.Dispose();
sourceFastBitmap.Dispose();
sourceBitmap.Dispose();
return (Image)medianBitmap;
}
/// <summary>
/// Perfoms a median filter on the specified image
/// </summary>
/// <param name="image">The image.</param>
/// <param name="size">The size (pixels squared) of the area to take the median of.</param>
/// <returns>The filtered median</returns>
public static Image MedianFilter(Image image, int size)
{
Bitmap sourceBitmap = new Bitmap(image);
Bitmap medianBitmap = new Bitmap(image.Width, image.Height);
var medianFastBitmap = new BitmapAccessor(medianBitmap);
var sourceFastBitmap = new BitmapAccessor(sourceBitmap);
int apetureMin = -(size / 2);
int apetureMax = (size / 2);
List<int> rValues = new List<int>();
List<int> gValues = new List<int>();
List<int> bValues = new List<int>();
Color medianColor;
Color currentColor;
for (int x = 0; x < medianBitmap.Width; x++)
{
for (int y = 0; y < medianBitmap.Height; y++)
{
for (int currentX = x + apetureMin; currentX < x + apetureMax; currentX++)
{
if (currentX >= 0 && currentX < medianBitmap.Width)
{
for (int currentY = y + apetureMin; currentY < y + apetureMax; currentY++)
{
if (currentY >= 0 && currentY < medianBitmap.Height)
{
currentColor = sourceFastBitmap.GetPixel(currentX, currentY);
rValues.Add(currentColor.R);
gValues.Add(currentColor.G);
bValues.Add(currentColor.B);
}
}
}
}
rValues.Sort();
gValues.Sort();
bValues.Sort();
medianColor = Color.FromArgb(rValues[rValues.Count / 2],
gValues[gValues.Count / 2],
bValues[bValues.Count / 2]);
medianFastBitmap.SetPixel(x, y, medianColor);
rValues.Clear();
gValues.Clear();
bValues.Clear();
}
}
medianFastBitmap.Dispose();
sourceFastBitmap.Dispose();
sourceBitmap.Dispose();
return (Image)medianBitmap;
}
/// <summary>
/// Perfoms a median filter on the specified image
/// </summary>
/// <param name="image">The image.</param>
/// <param name="size">The size (pixels squared) of the area to take the median of.</param>
/// <returns>The filtered median</returns>
public static Image MedianFilter(Image image, int size)
{
var sourceBitmap = new Bitmap(image);
var medianBitmap = new Bitmap(image.Width, image.Height);
var medianFastBitmap = new BitmapAccessor(medianBitmap);
var sourceFastBitmap = new BitmapAccessor(sourceBitmap);
var apetureMin = -(size / 2);
var apetureMax = (size / 2);
var rValues = new List <int>();
var gValues = new List <int>();
var bValues = new List <int>();
Color medianColor;
Color currentColor;
for (var x = 0; x < medianBitmap.Width; x++)
{
for (var y = 0; y < medianBitmap.Height; y++)
{
for (var currentX = x + apetureMin; currentX < x + apetureMax; currentX++)
{
if (currentX >= 0 && currentX < medianBitmap.Width)
{
for (var currentY = y + apetureMin; currentY < y + apetureMax; currentY++)
{
if (currentY >= 0 && currentY < medianBitmap.Height)
{
currentColor = sourceFastBitmap.GetPixel(currentX, currentY);
rValues.Add(currentColor.R);
gValues.Add(currentColor.G);
bValues.Add(currentColor.B);
}
}
}
}
rValues.Sort();
gValues.Sort();
bValues.Sort();
medianColor = Color.FromArgb(rValues[rValues.Count / 2],
gValues[gValues.Count / 2],
bValues[bValues.Count / 2]);
medianFastBitmap.SetPixel(x, y, medianColor);
rValues.Clear();
gValues.Clear();
bValues.Clear();
}
}
medianFastBitmap.Dispose();
sourceFastBitmap.Dispose();
sourceBitmap.Dispose();
return(medianBitmap);
}
