/// <summary>
/// blur the image
/// </summary>
/// <param name="img">
/// image to manipulate
/// </param>
/// <param name="weight">
/// weight of effect
/// </param>
public static void Blur(ref ImageData img, double weight)
{
ConvolutionMatrix cMatrix = new ConvolutionMatrix(3);
cMatrix.SetAll(1);
cMatrix.Matrix[1, 1] = weight;
cMatrix.Factor = weight + 8;
ApplyConvolution3X3(ref img, cMatrix);
}
/// <summary>
/// The apply convolution 3 x 3.
/// </summary>
/// <param name="img">
/// The img.
/// </param>
/// <param name="matrix">
/// The matrix.
/// </param>
private static void ApplyConvolution3X3(ref ImageData img, ConvolutionMatrix matrix)
{
ImageData newImg = img.Clone();
Color[,] pixelColor = new Color[3, 3];
for(int y = 0; y < img.Height - 2; y++)
{
for(int x = 0; x < img.Width - 2; x++)
{
pixelColor[0, 0] = img[x, y];
pixelColor[0, 1] = img[x, y + 1];
pixelColor[0, 2] = img[x, y + 2];
pixelColor[1, 0] = img[x + 1, y];
pixelColor[1, 1] = img[x + 1, y + 1];
pixelColor[1, 2] = img[x + 1, y + 2];
pixelColor[2, 0] = img[x + 2, y];
pixelColor[2, 1] = img[x + 2, y + 1];
pixelColor[2, 2] = img[x + 2, y + 2];
int alphaChannel = pixelColor[1, 1].A;
int redChannel =
(int)
((((pixelColor[0, 0].R * matrix.Matrix[0, 0]) + (pixelColor[1, 0].R * matrix.Matrix[1, 0])
+ (pixelColor[2, 0].R * matrix.Matrix[2, 0]) + (pixelColor[0, 1].R * matrix.Matrix[0, 1])
+ (pixelColor[1, 1].R * matrix.Matrix[1, 1]) + (pixelColor[2, 1].R * matrix.Matrix[2, 1])
+ (pixelColor[0, 2].R * matrix.Matrix[0, 2]) + (pixelColor[1, 2].R * matrix.Matrix[1, 2])
+ (pixelColor[2, 2].R * matrix.Matrix[2, 2])) / matrix.Factor) + matrix.Offset);
int greenChannel =
(int)
((((pixelColor[0, 0].G * matrix.Matrix[0, 0]) + (pixelColor[1, 0].G * matrix.Matrix[1, 0])
+ (pixelColor[2, 0].G * matrix.Matrix[2, 0]) + (pixelColor[0, 1].G * matrix.Matrix[0, 1])
+ (pixelColor[1, 1].G * matrix.Matrix[1, 1]) + (pixelColor[2, 1].G * matrix.Matrix[2, 1])
+ (pixelColor[0, 2].G * matrix.Matrix[0, 2]) + (pixelColor[1, 2].G * matrix.Matrix[1, 2])
+ (pixelColor[2, 2].G * matrix.Matrix[2, 2])) / matrix.Factor) + matrix.Offset);
int blueChannel =
(int)
((((pixelColor[0, 0].B * matrix.Matrix[0, 0]) + (pixelColor[1, 0].B * matrix.Matrix[1, 0])
+ (pixelColor[2, 0].B * matrix.Matrix[2, 0]) + (pixelColor[0, 1].B * matrix.Matrix[0, 1])
+ (pixelColor[1, 1].B * matrix.Matrix[1, 1]) + (pixelColor[2, 1].B * matrix.Matrix[2, 1])
+ (pixelColor[0, 2].B * matrix.Matrix[0, 2]) + (pixelColor[1, 2].B * matrix.Matrix[1, 2])
+ (pixelColor[2, 2].B * matrix.Matrix[2, 2])) / matrix.Factor) + matrix.Offset);
redChannel = (redChannel > 255) ? 255 : redChannel;
redChannel = (redChannel < 0) ? 0 : redChannel;
greenChannel = (greenChannel > 255) ? 255 : greenChannel;
greenChannel = (greenChannel < 0) ? 0 : greenChannel;
blueChannel = (blueChannel > 255) ? 255 : blueChannel;
blueChannel = (blueChannel < 0) ? 0 : blueChannel;
newImg.SetPixel(x + 1, y + 1, Color.FromArgb(alphaChannel, redChannel, greenChannel, blueChannel));
}
}
img = newImg.Clone();
}
/// <summary>
/// apply gaussianblur to image
/// </summary>
/// <param name="img">
/// image to manipulate
/// </param>
/// <param name="peakValue">
/// parameter
/// </param>
public static void GaussianBlur(ref ImageData img, double peakValue)
{
ConvolutionMatrix cMatrix = new ConvolutionMatrix(3);
cMatrix.SetAll(1);
cMatrix.Matrix[0, 0] = peakValue / 4;
cMatrix.Matrix[1, 0] = peakValue / 2;
cMatrix.Matrix[2, 0] = peakValue / 4;
cMatrix.Matrix[0, 1] = peakValue / 2;
cMatrix.Matrix[1, 1] = peakValue;
cMatrix.Matrix[2, 1] = peakValue / 2;
cMatrix.Matrix[0, 2] = peakValue / 4;
cMatrix.Matrix[1, 2] = peakValue / 2;
cMatrix.Matrix[2, 2] = peakValue / 4;
cMatrix.Factor = peakValue * 4;
ApplyConvolution3X3(ref img, cMatrix);
}
/// <summary>
/// sharpen an image
/// </summary>
/// <param name="img">
/// image to manipulate
/// </param>
/// <param name="weight">
/// weight
/// </param>
public static void Sharpen(ref ImageData img, double weight)
{
ConvolutionMatrix cMatrix = new ConvolutionMatrix(3);
cMatrix.SetAll(1);
cMatrix.Matrix[0, 0] = 0;
cMatrix.Matrix[1, 0] = -2;
cMatrix.Matrix[2, 0] = 0;
cMatrix.Matrix[0, 1] = -2;
cMatrix.Matrix[1, 1] = weight;
cMatrix.Matrix[2, 1] = -2;
cMatrix.Matrix[0, 2] = 0;
cMatrix.Matrix[1, 2] = -2;
cMatrix.Matrix[2, 2] = 0;
cMatrix.Factor = weight - 8;
ApplyConvolution3X3(ref img, cMatrix);
}
/// <summary>
/// apply emboss effect on image
/// </summary>
/// <param name="img">
/// image to manipulate
/// </param>
/// <param name="weight">
/// weight of emboss effect
/// </param>
public static void Emboss(ref ImageData img, double weight)
{
ConvolutionMatrix cMatrix = new ConvolutionMatrix(3);
cMatrix.SetAll(1);
cMatrix.Matrix[0, 0] = -1;
cMatrix.Matrix[1, 0] = 0;
cMatrix.Matrix[2, 0] = -1;
cMatrix.Matrix[0, 1] = 0;
cMatrix.Matrix[1, 1] = weight;
cMatrix.Matrix[2, 1] = 0;
cMatrix.Matrix[0, 2] = -1;
cMatrix.Matrix[1, 2] = 0;
cMatrix.Matrix[2, 2] = -1;
cMatrix.Factor = 4;
cMatrix.Offset = 127;
ApplyConvolution3X3(ref img, cMatrix);
}
