private static Pixel[,] YUVBlocksToGrayscalePixelMatrix(PPMImage Image)
{
Pixel[,] final = new Pixel[Image.Height, Image.Width];
int step = 0;
int rank = Communicator.world.Rank - 1;
int size = Communicator.world.Size - 1;
for (int i = 0; i < Image.Blocks.Count(); i = i + 3)
{
if (rank == step % size)
{
double[,] yMatrix = Image.Blocks[i].Matrix;
int starti = Image.Blocks[i].PositionI;
int startj = Image.Blocks[i].PositionJ;
for (int mi = 0; mi < yMatrix.GetLength(0); mi++)
{
for (int mj = 0; mj < yMatrix.GetLength(1); mj++)
{
double c = yMatrix[mi, mj] - 16;
int r = Clamp((int)(298 * c + 128) >> 8, 0, 255);
int g = Clamp((int)(298 * c + 128) >> 8, 0, 255);
int b = Clamp((int)(298 * c + 128) >> 8, 0, 255);
final[starti + mi, startj + mj] = new Pixel(r, g, b);
}
}
}
step++;
}
return(final);
}
private static void Master()
{
bool choosePictureAlive = true;
while (choosePictureAlive)
{
bool chooseFilterAlive = true;
Console.Write("Path to picture: ");
string path = Console.ReadLine();
PPMImage image = PPMOperations.ReadPPMImageFromFile(path);
PPMOperations.Broadcast(image);
while (chooseFilterAlive)
{
//add filter in menu
Console.Write("Choose filter: \n\t'1'-Regular\n\t'2'-Grayscale" +
"\n\t'3'-Blur\n\t'4'-Find Edges" +
"\n\t'5'-Choose different picture\n\t'0'-Exit\nFilter: ");
string filter = Console.ReadLine();
switch (filter)
{
case "1":
case "2":
PPMOperations.Broadcast(filter);
GenerateFullImage(image);
break;
case "3":
case "4":
PPMOperations.Broadcast(filter);
GenerateFilteredImage(image, filter);
break;
case "5":
PPMOperations.Broadcast(filter);
chooseFilterAlive = false;
break;
case "0":
PPMOperations.Broadcast(filter);
chooseFilterAlive = false;
choosePictureAlive = false;
break;
default:
Console.WriteLine("Invalid command.\n");
break;
}
}
}
}
public static PPMImage ReadPPMImageFromFile(String path)
{
List <String> before = File.ReadAllLines(path).ToList();
string[] thirdLine = before[2].Split(' ');
int width = Convert.ToInt16(thirdLine[0]);
int height = Convert.ToInt16(thirdLine[1]);
int maxValue = Convert.ToInt16(before[3].Trim());
Block[] blocks = RGBListToYUVBlocks(before.Skip(4).ToList(), width, height, 8).ToArray();
PPMImage image = new PPMImage(before[0], before[1], width, height, maxValue, blocks);
return(image);
}
public static void GenerateImage(PPMImage image, string outputPath)
{
Pixel[,] matrix = MergePixelMatrices();
StringBuilder sb = new StringBuilder();
sb.Append(image.FirstComment);
sb.Append('\n');
sb.Append(image.SecondComment);
sb.Append('\n');
sb.Append(image.Width + " " + image.Height);
sb.Append('\n');
sb.Append(image.MaxValue);
sb.Append(PixelMatrixToString(matrix));
WriteToFile(outputPath, sb.ToString());
}
public static void GenerateRegularImage(PPMImage Image, string path)
{
StringBuilder sb = new StringBuilder();
sb.Append(Image.FirstComment);
sb.Append('\n');
sb.Append(Image.SecondComment);
sb.Append('\n');
sb.Append(Image.Width + " " + Image.Height);
sb.Append('\n');
sb.Append(Image.MaxValue);
sb.Append('\n');
sb.Append(YUVBlocksToRGBString(Image));
File.WriteAllText(path, sb.ToString());
}
public static void GenerateFilteredImage(PPMImage image, double[,] filterMatrix, double filterFactor, double filterBias, string outputPath)
{
Pixel[,] matrix = MergePixelMatrices();
Pixel[,] finalMatrix = ApplyFilter(matrix, filterMatrix, filterFactor, filterBias);
StringBuilder sb = new StringBuilder();
sb.Append(image.FirstComment);
sb.Append('\n');
sb.Append(image.SecondComment);
sb.Append('\n');
sb.Append(image.Width + " " + image.Height);
sb.Append('\n');
sb.Append(image.MaxValue);
sb.Append(PixelMatrixToString(finalMatrix));
WriteToFile(outputPath, sb.ToString());
}
private static PPMImage MergeImages()
{
PPMImage Image = Communicator.world.Receive <PPMImage>(1, 0);
for (int i = 2; i < Communicator.world.Size; i++)
{
PPMImage img = Communicator.world.Receive <PPMImage>(i, 0);
for (int j = 0; j < img.Blocks.Length; j++)
{
if (img.Blocks[j].Type != Block.Types.None)
{
Image.Blocks[j] = img.Blocks[j];
}
}
}
return(Image);
}
private static void Worker()
{
bool choosePictureAlive = true;
while (choosePictureAlive)
{
bool chooseFilterAlive = true;
PPMImage image = Communicator.world.Receive <PPMImage>(0, 0);
//add filter in menu
while (chooseFilterAlive)
{
string filter = Communicator.world.Receive <string>(0, 0);
switch (filter)
{
case "1":
PPMOperations.GenerateRegularImage(image);
break;
case "2":
PPMOperations.GenerateGrayscaleImage(image);
break;
case "3":
PPMOperations.GenerateBlurImage(image);
break;
case "4":
PPMOperations.GenerateEdgeImage(image);
break;
case "5":
chooseFilterAlive = false;
break;
case "0":
chooseFilterAlive = false;
choosePictureAlive = false;
break;
}
}
}
}
private static void GenerateFilteredImage(PPMImage image, string filter)
{
//add if statement for the new filter
if (filter == "3")
{
double[,] filterMatrix =
{
{ 1, 0, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 1, 0, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 1, 0, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 1, 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 1, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 1, 0, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 1, 0, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 1, 0 },
{ 0, 0, 0, 0, 0, 0, 0, 0, 1 },
};
double filterFactor = 1.0 / 9.0;
double filterBias = 0.0;
PPMOperations.GenerateFilteredImage(image, filterMatrix, filterFactor, filterBias, "after.ppm");
}
else if (filter == "4")
{
double[,] filterMatrix =
{
{ 0, 0, -1, 0, 0 },
{ 0, 0, -1, 0, 0 },
{ 0, 0, 2, 0, 0 },
{ 0, 0, 0, 0, 0 },
{ 0, 0, 0, 0, 0 },
};
double filterFactor = 1.0;
double filterBias = 0.0;
PPMOperations.GenerateFilteredImage(image, filterMatrix, filterFactor, filterBias, "after.ppm");
}
}
public static void ReadPPMImageFromFile(PPMImage Image, String path)
{
List <String> before = File.ReadAllLines(path).ToList();
string[] thirdLine = before[2].Split(' ');
Image.Width = Convert.ToInt16(thirdLine[0]);
Image.Height = Convert.ToInt16(thirdLine[1]);
Image.MaxValue = Convert.ToInt16(before[3].Trim());
Block[] blocks = RGBListToYUVBlocks(before.Skip(4).ToList(), Image.Width, Image.Height, 8);
for (int i = 0; i < blocks.Length; i++)
{
if (Image.Blocks[i].Type == Block.Types.None)
{
Image.Blocks[i] = blocks[i];
}
}
//Image.Blocks = blocks;
}
private static Pixel[,] YUVBlocksToPixelMatrix(PPMImage Image)
{
Pixel[,] final = new Pixel[Image.Height, Image.Width];
int size = Communicator.world.Size - 1;
int rank = Communicator.world.Rank - 1;
int k = 0;
for (int i = 0; i < Image.Blocks.Length; i = i + 3)
{
if (k % size == rank)
{
double[,] yMatrix = Image.Blocks[i].Matrix;
double[,] uMatrix = Image.Blocks[i + 1].Matrix;
double[,] vMatrix = Image.Blocks[i + 2].Matrix;
int starti = Image.Blocks[i].PositionI;
int startj = Image.Blocks[i].PositionJ;
for (int mi = 0; mi < yMatrix.GetLength(0); mi++)
{
for (int mj = 0; mj < yMatrix.GetLength(1); mj++)
{
double c = yMatrix[mi, mj] - 16;
double d = uMatrix[mi, mj] - 128;
double e = vMatrix[mi, mj] - 128;
int r = Clamp((int)(298 * c + 409 * e + 128) >> 8, Image.MaxValue);
int g = Clamp((int)(298 * c - 100 * d - 208 * e + 128) >> 8, Image.MaxValue);
int b = Clamp((int)(298 * c + 516 * d + 128) >> 8, Image.MaxValue);
final[starti + mi, startj + mj] = new Pixel(r, g, b);
}
}
}
k++;
}
return(final);
}
public static void GenerateEdgeImage(PPMImage image)
{
Pixel[,] matrix = YUVBlocksToPixelMatrix(image);
Communicator.world.Send <Pixel[, ]>(matrix, 0, 0);
}
private static void GenerateFullImage(PPMImage image)
{
PPMOperations.GenerateImage(image, "after.ppm");
}
