public Bitmap Convolution3x3(Bitmap b, ConvolutionMatrix m)
{
Bitmap newImg = (Bitmap)b.Clone();
Color[,] pixelColor = new Color[3, 3];
int A, R, G, B;
for (int y = 0; y < b.Height - 2; y++)
{
for (int x = 0; x < b.Width - 2; x++)
{
pixelColor[0, 0] = b.GetPixel(x, y);
pixelColor[0, 1] = b.GetPixel(x, y + 1);
pixelColor[0, 2] = b.GetPixel(x, y + 2);
pixelColor[1, 0] = b.GetPixel(x + 1, y);
pixelColor[1, 1] = b.GetPixel(x + 1, y + 1);
pixelColor[1, 2] = b.GetPixel(x + 1, y + 2);
pixelColor[2, 0] = b.GetPixel(x + 2, y);
pixelColor[2, 1] = b.GetPixel(x + 2, y + 1);
pixelColor[2, 2] = b.GetPixel(x + 2, y + 2);
A = pixelColor[1, 1].A;
R = (int)((((pixelColor[0, 0].R * m.Matrix[0, 0]) +
(pixelColor[1, 0].R * m.Matrix[1, 0]) +
(pixelColor[2, 0].R * m.Matrix[2, 0]) +
(pixelColor[0, 1].R * m.Matrix[0, 1]) +
(pixelColor[1, 1].R * m.Matrix[1, 1]) +
(pixelColor[2, 1].R * m.Matrix[2, 1]) +
(pixelColor[0, 2].R * m.Matrix[0, 2]) +
(pixelColor[1, 2].R * m.Matrix[1, 2]) +
(pixelColor[2, 2].R * m.Matrix[2, 2]))
/ m.Factor) + m.Offset);
if (R < 0)
{
R = 0;
}
else if (R > 255)
{
R = 255;
}
G = (int)((((pixelColor[0, 0].G * m.Matrix[0, 0]) +
(pixelColor[1, 0].G * m.Matrix[1, 0]) +
(pixelColor[2, 0].G * m.Matrix[2, 0]) +
(pixelColor[0, 1].G * m.Matrix[0, 1]) +
(pixelColor[1, 1].G * m.Matrix[1, 1]) +
(pixelColor[2, 1].G * m.Matrix[2, 1]) +
(pixelColor[0, 2].G * m.Matrix[0, 2]) +
(pixelColor[1, 2].G * m.Matrix[1, 2]) +
(pixelColor[2, 2].G * m.Matrix[2, 2]))
/ m.Factor) + m.Offset);
if (G < 0)
{
G = 0;
}
else if (G > 255)
{
G = 255;
}
B = (int)((((pixelColor[0, 0].B * m.Matrix[0, 0]) +
(pixelColor[1, 0].B * m.Matrix[1, 0]) +
(pixelColor[2, 0].B * m.Matrix[2, 0]) +
(pixelColor[0, 1].B * m.Matrix[0, 1]) +
(pixelColor[1, 1].B * m.Matrix[1, 1]) +
(pixelColor[2, 1].B * m.Matrix[2, 1]) +
(pixelColor[0, 2].B * m.Matrix[0, 2]) +
(pixelColor[1, 2].B * m.Matrix[1, 2]) +
(pixelColor[2, 2].B * m.Matrix[2, 2]))
/ m.Factor) + m.Offset);
if (B < 0)
{
B = 0;
}
else if (B > 255)
{
B = 255;
}
newImg.SetPixel(x+1, y+1, Color.FromArgb(A, R, G, B));
}
}
return newImg;
}
public void ApplySmooth(double weight)
{
ConvolutionMatrix matrix = new ConvolutionMatrix(3);
matrix.SetAll(1);
matrix.Matrix[1,1] = weight;
matrix.Factor = weight + 8;
bitmapImage = Convolution3x3(bitmapImage, matrix);
}
public void ApplyGaussianBlur(double peakValue)
{
ConvolutionMatrix matrix = new ConvolutionMatrix(3);
matrix.SetAll(1);
matrix.Matrix[0, 0] = peakValue / 4;
matrix.Matrix[1, 0] = peakValue / 2;
matrix.Matrix[2, 0] = peakValue / 4;
matrix.Matrix[0, 1] = peakValue / 2;
matrix.Matrix[1, 1] = peakValue;
matrix.Matrix[2, 1] = peakValue / 2;
matrix.Matrix[0, 2] = peakValue / 4;
matrix.Matrix[1, 2] = peakValue / 2;
matrix.Matrix[2, 2] = peakValue / 4;
matrix.Factor = peakValue * 4;
bitmapImage = Convolution3x3(bitmapImage, matrix);
}
public void ApplySharpen(double weight)
{
ConvolutionMatrix matrix = new ConvolutionMatrix(3);
matrix.SetAll(1);
matrix.Matrix[0, 0] = 0;
matrix.Matrix[1, 0] = -2;
matrix.Matrix[2, 0] = 0;
matrix.Matrix[0, 1] = -2;
matrix.Matrix[1, 1] = weight;
matrix.Matrix[2, 1] = -2;
matrix.Matrix[0, 2] = 0;
matrix.Matrix[1, 2] = -2;
matrix.Matrix[2, 2] = 0;
matrix.Factor = weight - 8;
bitmapImage = Convolution3x3(bitmapImage, matrix);
}
public void ApplyEmboss(double weight)
{
ConvolutionMatrix matrix = new ConvolutionMatrix(3);
matrix.SetAll(1);
matrix.Matrix[0, 0] = -1;
matrix.Matrix[1, 0] = 0;
matrix.Matrix[2, 0] = -1;
matrix.Matrix[0, 1] = 0;
matrix.Matrix[1, 1] = weight;
matrix.Matrix[2, 1] = 0;
matrix.Matrix[0, 2] = -1;
matrix.Matrix[1, 2] = 0;
matrix.Matrix[2, 2] = -1;
matrix.Factor = 4;
matrix.Offset = 127;
bitmapImage = Convolution3x3(bitmapImage, matrix);
}
