public override Image Apply(Image img)
{
using (img)
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.Matrix[0, 0] = X0Y0;
cm.Matrix[1, 0] = X1Y0;
cm.Matrix[2, 0] = X2Y0;
cm.Matrix[0, 1] = X0Y1;
cm.Matrix[1, 1] = X1Y1;
cm.Matrix[2, 1] = X2Y1;
cm.Matrix[0, 2] = X0Y2;
cm.Matrix[1, 2] = X1Y2;
cm.Matrix[2, 2] = X2Y2;
cm.Factor = Factor;
cm.Offset = Offset;
return cm.Apply(img);
}
}
public static ConvolutionMatrix Sharpen(int weight = 11)
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.SetAll(0);
cm.Matrix[1, 1] = weight;
cm.Matrix[1, 0] = cm.Matrix[0, 1] = cm.Matrix[2, 1] = cm.Matrix[1, 2] = -2;
cm.Factor = weight - 8;
return cm;
}
public static ConvolutionMatrix Smooth(int weight = 1)
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.SetAll(1);
cm.Matrix[1, 1] = weight;
cm.Factor = weight + 8;
return cm;
}
public static ConvolutionMatrix MeanRemoval(int weight = 9)
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.SetAll(-1);
cm.Matrix[1, 1] = weight;
cm.Factor = weight - 8;
return cm;
}
public static ConvolutionMatrix GaussianBlur(int weight = 4)
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.SetAll(1);
cm.Matrix[1, 1] = weight;
cm.Matrix[1, 0] = cm.Matrix[0, 1] = cm.Matrix[2, 1] = cm.Matrix[1, 2] = 2;
cm.Factor = weight + 12;
return cm;
}
public static ConvolutionMatrix Emboss()
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.SetAll(-1);
cm.Matrix[1, 1] = 4;
cm.Matrix[1, 0] = cm.Matrix[0, 1] = cm.Matrix[2, 1] = cm.Matrix[1, 2] = 0;
cm.Offset = 127;
return cm;
}
public static ConvolutionMatrix EdgeDetect()
{
ConvolutionMatrix cm = new ConvolutionMatrix();
cm.Matrix[0, 0] = cm.Matrix[1, 0] = cm.Matrix[2, 0] = -1;
cm.Matrix[0, 1] = cm.Matrix[1, 1] = cm.Matrix[2, 1] = 0;
cm.Matrix[0, 2] = cm.Matrix[1, 2] = cm.Matrix[2, 2] = 1;
cm.Offset = 127;
return cm;
}
public static Image Apply(this ConvolutionMatrix matrix, Image img)
{
int factor = Math.Max(matrix.Factor, 1);
Bitmap result = (Bitmap)img.Clone();
using (UnsafeBitmap source = new UnsafeBitmap((Bitmap)img, true, ImageLockMode.ReadOnly))
using (UnsafeBitmap dest = new UnsafeBitmap(result, true, ImageLockMode.WriteOnly))
{
int height = source.Height - 2;
int width = source.Width - 2;
ColorBgra[,] pixelColor = new ColorBgra[3, 3];
int pixel;
ColorBgra color = new ColorBgra();
for (int y = 0; y < height; y++)
{
for (int x = 0; x < width; x++)
{
pixelColor[0, 0] = source.GetPixel(x, y);
pixelColor[0, 1] = source.GetPixel(x, y + 1);
pixelColor[0, 2] = source.GetPixel(x, y + 2);
pixelColor[1, 0] = source.GetPixel(x + 1, y);
pixelColor[1, 1] = source.GetPixel(x + 1, y + 1);
pixelColor[1, 2] = source.GetPixel(x + 1, y + 2);
pixelColor[2, 0] = source.GetPixel(x + 2, y);
pixelColor[2, 1] = source.GetPixel(x + 2, y + 1);
pixelColor[2, 2] = source.GetPixel(x + 2, y + 2);
pixel = (((pixelColor[0, 0].Blue * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Blue * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Blue * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Blue * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Blue * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Blue * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Blue * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Blue * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Blue * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0)
{
pixel = 0;
}
else if (pixel > 255)
{
pixel = 255;
}
color.Blue = (byte)pixel;
pixel = (((pixelColor[0, 0].Green * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Green * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Green * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Green * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Green * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Green * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Green * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Green * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Green * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0)
{
pixel = 0;
}
else if (pixel > 255)
{
pixel = 255;
}
color.Green = (byte)pixel;
pixel = (((pixelColor[0, 0].Red * matrix.Matrix[0, 0]) +
(pixelColor[1, 0].Red * matrix.Matrix[1, 0]) +
(pixelColor[2, 0].Red * matrix.Matrix[2, 0]) +
(pixelColor[0, 1].Red * matrix.Matrix[0, 1]) +
(pixelColor[1, 1].Red * matrix.Matrix[1, 1]) +
(pixelColor[2, 1].Red * matrix.Matrix[2, 1]) +
(pixelColor[0, 2].Red * matrix.Matrix[0, 2]) +
(pixelColor[1, 2].Red * matrix.Matrix[1, 2]) +
(pixelColor[2, 2].Red * matrix.Matrix[2, 2])) / factor) + matrix.Offset;
if (pixel < 0)
{
pixel = 0;
}
else if (pixel > 255)
{
pixel = 255;
}
color.Red = (byte)pixel;
color.Alpha = pixelColor[1, 1].Alpha;
dest.SetPixel(x + 1, y + 1, color);
}
}
}
return(result);
}
