static void DoGaussian(AdvancedConvolutionWindow window, ImageData toCompute)
{
List <Color> colorList = new List <Color>();
for (int yIndex = 0; yIndex < toCompute.image.Height; yIndex++)
{
for (int xIndex = 0; xIndex < toCompute.image.Width; xIndex++)
{
window.sumElements.Clear();
StandardConvolution(window, toCompute.image, xIndex, yIndex);
int sum = window.sumElements.Sum() / window.gaussianWeightedSum;
if (sum < 0)
{
sum = 0;
}
if (sum > 255)
{
sum = 255;
}
colorList.Add(Color.FromArgb(sum, sum, sum));
}
}
int indexColor = 0;
for (int yIndex = 0; yIndex < toCompute.image.Height; yIndex++)
{
for (int xIndex = 0; xIndex < toCompute.image.Width; xIndex++)
{
toCompute.image.SetPixel(xIndex, yIndex, colorList[indexColor]);
indexColor++;
}
}
}
static int[] RobertConvolution(AdvancedConvolutionWindow window, FasterBitmap toCompute, int centerPositionX, int centerPositionY)
{
int[] values = new int[2];
int xComputation = 0;
int yComputation = 0;
for (int yIndex = centerPositionY; yIndex < centerPositionY + 2; yIndex++)
{
for (int xIndex = centerPositionX; xIndex < centerPositionX + 2; xIndex++)
{
if ((yIndex < 0) || (yIndex >= toCompute.Height) || (xIndex < 0) || (xIndex >= toCompute.Width))
{
continue;
}
else
{
xComputation = xComputation + (toCompute.GetPixel(xIndex, yIndex).B *window.horizontalValueMatrix[yIndex - centerPositionY][xIndex - centerPositionX]);
yComputation = yComputation + (toCompute.GetPixel(xIndex, yIndex).B *window.verticalValueMatrix[yIndex - centerPositionY][xIndex - centerPositionX]);
}
}
}
values[0] = xComputation;
values[1] = yComputation;
return(values);
}
static void ChooseConvolution(AdvancedConvolutionWindow window, ImageData toCompute)
{
if (window.processingFilter == "gaussian")
{
DoGaussian(window, toCompute);
savePath = "results/" + toCompute.fileName + "GaussianFilterResult.bmp";
}
else if (window.processingFilter == "prewitt")
{
DoSobelPrewitt(window, toCompute);
savePath = "results/" + toCompute.fileName + "PrewittFilterResult.bmp";
}
else if (window.processingFilter == "sobel")
{
DoSobelPrewitt(window, toCompute);
savePath = "results/" + toCompute.fileName + "SobelFilterResult.bmp";
}
else if (window.processingFilter == "robert")
{
DoRobert(window, toCompute);
savePath = "results/" + toCompute.fileName + "RobertsFilterResult.bmp";
}
else if (window.processingFilter == "laplacian4")
{
DoLaplacian(window, toCompute);
savePath = "results/" + toCompute.fileName + "Laplacian4Result.bmp";
}
else if (window.processingFilter == "laplacian8")
{
DoLaplacian(window, toCompute);
savePath = "results/" + toCompute.fileName + "Laplacian8Result.bmp";
}
}
static int[] SobelPrewittConvolution(AdvancedConvolutionWindow window, FasterBitmap toCompute, int centerPositionX, int centerPositionY)
{
int[] values = new int[2];
int xComputation = 0;
int yComputation = 0;
int yIndexFromZero = 0;
for (int yIndex = centerPositionY - (window.windowDiameter / 2); yIndex < centerPositionY + (window.windowDiameter / 2) + 1; yIndex++)
{
int xIndexFromZero = 0;
for (int xIndex = centerPositionX - (window.windowDiameter / 2); xIndex < centerPositionX + (window.windowDiameter / 2) + 1; xIndex++)
{
if ((yIndex < 0) || (yIndex >= toCompute.Height) || (xIndex < 0) || (xIndex >= toCompute.Width))
{
continue;
}
else
{
xComputation = xComputation + (toCompute.GetPixel(xIndex, yIndex).B *window.horizontalValueMatrix[yIndexFromZero][xIndexFromZero]);
yComputation = yComputation + (toCompute.GetPixel(xIndex, yIndex).B *window.verticalValueMatrix[yIndexFromZero][xIndexFromZero]);
}
xIndexFromZero++;
}
yIndexFromZero++;
}
values[0] = xComputation;
values[1] = yComputation;
return(values);
}
static void DoRobert(AdvancedConvolutionWindow window, ImageData toCompute)
{
List <Color> colorList = new List <Color>();
for (int yIndex = 0; yIndex < toCompute.image.Height; yIndex++)
{
for (int xIndex = 0; xIndex < toCompute.image.Width; xIndex++)
{
int[] values = RobertConvolution(window, toCompute.image, xIndex, yIndex);
int value = window.DoNorm(values);
if (value < 0)
{
value = 0;
}
if (value > 255)
{
value = 255;
}
colorList.Add(Color.FromArgb(value, value, value));
}
}
int indexColor = 0;
for (int yIndex = 0; yIndex < toCompute.image.Height; yIndex++)
{
for (int xIndex = 0; xIndex < toCompute.image.Width; xIndex++)
{
toCompute.image.SetPixel(xIndex, yIndex, colorList[indexColor]);
indexColor++;
}
}
}
public static void DoGaussianFilter(ImageData toCompute, string windowDiameter, bool saveResult)
{
AdvancedConvolutionWindow window = CreateAdvancedConvolutionWindow.DoCreateDiameter(windowDiameter);
ChooseConvolution(window, toCompute);
if (saveResult == true)
{
toCompute.SaveBitmap(savePath);
}
}
public static void DoFilters(ImageData toCompute, string convolutionWindowFilter, string windowNorm, bool saveResult)
{
AdvancedConvolutionWindow window = CreateAdvancedConvolutionWindow.DoCreateFilter(convolutionWindowFilter, windowNorm);
ChooseConvolution(window, toCompute);
if (saveResult == true)
{
toCompute.SaveBitmap(savePath);
}
}
public static AdvancedConvolutionWindow DoCreateFilter(string filter) //Create a 3x3 window for the given filter
{
if ((filter != "gaussian") && (filter != "prewitt") && (filter != "robert") && (filter != "sobel") && (filter != "laplacian4") && (filter != "laplacian8"))
{
Console.WriteLine("Unknown filter!");
return(null);
}
AdvancedConvolutionWindow window = new AdvancedConvolutionWindow(filter, "L2");
return(window);
}
public static AdvancedConvolutionWindow DoCreateDiameter(string diameter) //Create a Window for gaussian filter with the given diameter
{
int diameterTemp = 0;
if ((!int.TryParse(diameter, out diameterTemp)) || (diameterTemp % 2 == 0))
{
Console.WriteLine("Given diameter is invalid!");
return(null);
}
AdvancedConvolutionWindow window = new AdvancedConvolutionWindow(diameterTemp);
if (window.totalPixel == 0)
{
Console.WriteLine("The chosen convolution window does not contain any pixels!");
return(null);
}
return(window);
}
static void StandardConvolution(AdvancedConvolutionWindow window, FasterBitmap toCompute, int centerPositionX, int centerPositionY)
{
for (int yIndex = centerPositionY - (window.windowDiameter / 2); yIndex < centerPositionY + (window.windowDiameter / 2) + 1; yIndex++)
{
for (int xIndex = centerPositionX - (window.windowDiameter / 2); xIndex < centerPositionX + (window.windowDiameter / 2) + 1; xIndex++)
{
if ((yIndex < 0) || (yIndex >= toCompute.Height) || (xIndex < 0) || (xIndex >= toCompute.Width))
{
continue;
}
else
{
int yValueIndex = yIndex - centerPositionY + (window.windowDiameter / 2);
int xValueIndex = xIndex - centerPositionX + (window.windowDiameter / 2);
window.sumElements.Add((toCompute.GetPixel(xIndex, yIndex).B) * (window.valueMatrix[yValueIndex][xValueIndex]));
}
}
}
return;
}
