public FractalCompressionResult Compress(CustomImage image)
{
//Validate the image and the params
if (image.Width % _options.RSquareSize > 0 || image.Height % _options.RSquareSize > 0 || _options.DSquareSize % _options.RSquareSize > 0)
{
throw new InvalidOperationException("The compression options specified can't compress this image as the R squares size is not a divisor of height and width. Ri Sizes must be divisor of Di sizes too.");
}
object finalResultLock = new object();
int rXCount = image.Width / _options.RSquareSize; //Number of R Squares in X
int rYCount = image.Height / _options.RSquareSize; //Number of R Squares in Y
int totalRCount = rXCount * rYCount;
int maxDxPos = image.Width - _options.DSquareSize + 1; // POP: Ici, le coin supérieur droit du carré ne se rend pas au coin supérieur droit de l'image
int maxDyPos = image.Height - _options.DSquareSize + 1; // POP: même commentaire mais avec le coin inférieur gauche
byte dSize = _options.DSquareSize;
byte rSize = _options.RSquareSize;
int n = _options.RSquareSize * _options.RSquareSize;
double drRatio = (double)_options.RSquareSize / (double)_options.DSquareSize;
int drInverseRatio = _options.DSquareSize / _options.RSquareSize;
double pixelAverageSquareSize = (double)drInverseRatio * (double)drInverseRatio;
var translateMatrixes = GetTranslateMatrixes(_options.RSquareSize);
int transformationsCount = _transformMatrixes.Length;
var transformations = new FractalCompressionResult.FractalTransformation[totalRCount, 3]; //Transformations (2 dimension to keep transformations for each ri in each color component)
int rx;
double finalRmsY = Double.MaxValue, finalRmsI = Double.MaxValue, finalRmsQ = Double.MaxValue,
bestBrightnessY = 0d, bestContrastY = 0d,
bestBrightnessI = 0d, bestContrastI = 0d,
bestBrightnessQ = 0d, bestContrastQ = 0d;
var rawImgData = image.ImageData;
var imgDataY = new double[image.Width, image.Height];
var imgDataI = new double[image.Width, image.Height];
var imgDataQ = new double[image.Width, image.Height];
double[, ][][,] tempDiY = new double[maxDxPos, maxDyPos][][, ];
double[, ][][,] tempDiI = new double[maxDxPos, maxDyPos][][, ];
double[, ][][,] tempDiQ = new double[maxDxPos, maxDyPos][][, ];
double[,] sumsOfAY = new double[maxDxPos, maxDyPos];
double[,] sumsOfAYSquared = new double[maxDxPos, maxDyPos];
double[,] sumsOfAI = new double[maxDxPos, maxDyPos];
double[,] sumsOfAISquared = new double[maxDxPos, maxDyPos];
double[,] sumsOfAQ = new double[maxDxPos, maxDyPos];
double[,] sumsOfAQSquared = new double[maxDxPos, maxDyPos];
//Fill imgData Y, I and Q
Parallel.For(0, image.Width, dx =>
{
for (int dy = 0; dy < image.Height; dy++)
{
imgDataY[dx, dy] = rawImgData[dx, dy].YNormalized;
imgDataI[dx, dy] = rawImgData[dx, dy].IDownSampledAndNormalized;
imgDataQ[dx, dy] = rawImgData[dx, dy].QDownSampledAndNormalized;
}
});
//Average pixels of each Di to size of Ri
Parallel.For(0, maxDxPos, dx =>
{
int i, x, y, j, k, newX, newY, indexX = 0, indexY = 0;
double[,] tempTransformMatrix;
double[] tempTranslateMatrix;
double[,] tempPixelY1 = null;
double[,] tempPixelI1 = null;
double[,] tempPixelQ1 = null;
double tempSumY = 0d, tempSumI = 0d, tempSumQ = 0d,
tempAveragePixelY = 0d, tempAveragePixelI = 0d, tempAveragePixelQ = 0d;
for (int dy = 0; dy < maxDyPos; dy++)
{
tempDiY[dx, dy] = new double[transformationsCount][, ];
tempDiI[dx, dy] = new double[transformationsCount][, ];
tempDiQ[dx, dy] = new double[transformationsCount][, ];
for (i = 0; i < transformationsCount; i++)
{
for (x = 0; x < dSize; x += drInverseRatio) //Increment of inverse ratio to get only parts of Di
{
for (y = 0; y < dSize; y += drInverseRatio)
{
//Get transformation
tempTransformMatrix = _transformMatrixes[i];
tempTranslateMatrix = translateMatrixes[i];
//Average pixels on first transform
if (i == 0)
{
//Reset temp variables
tempSumY = 0;
tempSumI = 0;
tempSumQ = 0;
tempPixelY1 = new double[rSize, rSize];
tempPixelI1 = new double[rSize, rSize];
tempPixelQ1 = new double[rSize, rSize];
//Average pixels
for (j = 0; j < drInverseRatio; j++)
{
for (k = 0; k < drInverseRatio; k++)
{
tempSumY += imgDataY[dx + x + j, dy + y + k];
tempSumI += imgDataI[dx + x + j, dy + y + k];
tempSumQ += imgDataQ[dx + x + j, dy + y + k];
}
}
//Calculating average Pixel Components
tempAveragePixelY = tempSumY > 0 ? tempSumY / pixelAverageSquareSize : 0d;
tempAveragePixelI = tempSumI > 0 ? tempSumI / pixelAverageSquareSize : 0d;
tempAveragePixelQ = tempSumQ > 0 ? tempSumQ / pixelAverageSquareSize : 0d;
//Sum of "a" and "a^2" for future RMS calculation
sumsOfAY[dx, dy] += tempAveragePixelY;
sumsOfAI[dx, dy] += tempAveragePixelI;
sumsOfAQ[dx, dy] += tempAveragePixelQ;
sumsOfAYSquared[dx, dy] += tempAveragePixelY * tempAveragePixelY;
sumsOfAISquared[dx, dy] += tempAveragePixelI * tempAveragePixelI;
sumsOfAQSquared[dx, dy] += tempAveragePixelQ * tempAveragePixelQ;
}
newX = (byte)(tempTransformMatrix[0, 0] * (x / drInverseRatio) + tempTransformMatrix[0, 1] * (y / drInverseRatio) + tempTranslateMatrix[0]);
newY = (byte)(tempTransformMatrix[1, 0] * (x / drInverseRatio) + tempTransformMatrix[1, 1] * (y / drInverseRatio) + tempTranslateMatrix[1]);
indexX = (int)(newX * drRatio);
indexY = (int)(newY * drRatio);
//Store pixel components for transformed Di (Fi)
tempPixelY1[indexX, indexY] = tempAveragePixelY;
tempPixelI1[indexX, indexY] = tempAveragePixelI;
tempPixelQ1[indexX, indexY] = tempAveragePixelQ;
//Store pixels of Di
tempDiY[dx, dy][i] = tempPixelY1;
tempDiI[dx, dy][i] = tempPixelI1;
tempDiQ[dx, dy][i] = tempPixelQ1;
}
}
}
}
});
//Find the Transformations to do...
//For each Ri
for (rx = 0; rx < rXCount; rx++)
{
//Parallel execution of for loop, so it runs faster.
Parallel.For(0, rYCount, ry =>
{
//Calculate the sums of components in Ri for future RMS metric calculation
double sumOfBY = 0d;
double sumOfBYSquared = 0d;
double sumOfBI = 0d;
double sumOfBISquared = 0d;
double sumOfBQ = 0d;
double sumOfBQSquared = 0d;
double sumOfAAndBY;
double sumOfAAndBI;
double sumOfAAndBQ;
int x, y, indexX, indexY, dx, dy, i,
bestRmsYIndexX = -1, bestRmsYIndexY = -1, bestRmsYTransformationIndex = -1,
bestRmsIIndexX = -1, bestRmsIIndexY = -1, bestRmsITransformationIndex = -1,
bestRmsQIndexX = -1, bestRmsQIndexY = -1, bestRmsQTransformationIndex = -1;
double[,] tempPixelY = null;
double[,] tempPixelI = null;
double[,] tempPixelQ = null;
double tempContrastY, tempBrightnessY,
tempContrastI, tempBrightnessI,
tempContrastQ, tempBrightnessQ,
tempRmsY, tempRmsI, tempRmsQ;
for (x = 0; x < rSize; x++)
{
for (y = 0; y < rSize; y++)
{
//Sum of "b" and of "b^2"
indexX = rx * rSize + x;
indexY = ry * rSize + y;
sumOfBY += imgDataY[indexX, indexY];
sumOfBI += imgDataI[indexX, indexY];
sumOfBQ += imgDataQ[indexX, indexY];
sumOfBYSquared += imgDataY[indexX, indexY] * imgDataY[indexX, indexY];
sumOfBISquared += imgDataI[indexX, indexY] * imgDataI[indexX, indexY];
sumOfBQSquared += imgDataQ[indexX, indexY] * imgDataQ[indexX, indexY];
}
}
//For Each Di
using (var timer = new CustomTimer("Transformation"))
for (dx = 0; dx < maxDxPos; dx++)
{
for (dy = 0; dy < maxDyPos; dy++)
{
//For Each possible transformations
for (i = 0; i < transformationsCount; i++)
{
sumOfAAndBY = 0d;
sumOfAAndBI = 0d;
sumOfAAndBQ = 0d;
tempPixelY = tempDiY[dx, dy][i];
tempPixelI = tempDiI[dx, dy][i];
tempPixelQ = tempDiQ[dx, dy][i];
//Compute sums necessary for calculating RMS metric
for (x = 0; x < rSize; x++)
{
for (y = 0; y < rSize; y++)
{
//Calculate indexX and indexY
indexX = dx + x;
indexY = dy + y;
//Sum of "a*b"
sumOfAAndBY += tempPixelY[x, y] * imgDataY[indexX, indexY];
sumOfAAndBI += tempPixelI[x, y] * imgDataI[indexX, indexY];
sumOfAAndBQ += tempPixelQ[x, y] * imgDataQ[indexX, indexY];
}
}
//Compute contrast, brightness and RMS metric
tempContrastY = (n * sumOfAAndBY - sumsOfAY[dx, dy] * sumOfBY) / (n * sumsOfAYSquared[dx, dy] - Math.Pow(sumsOfAY[dx, dy], 2));
tempContrastI = (n * sumOfAAndBI - sumsOfAI[dx, dy] * sumOfBI) / (n * sumsOfAISquared[dx, dy] - Math.Pow(sumsOfAI[dx, dy], 2));
tempContrastQ = (n * sumOfAAndBQ - sumsOfAQ[dx, dy] * sumOfBQ) / (n * sumsOfAQSquared[dx, dy] - Math.Pow(sumsOfAQ[dx, dy], 2));
tempBrightnessY = (1d / n) * (sumOfBY - tempContrastY * sumsOfAY[dx, dy]);
tempBrightnessI = (1d / n) * (sumOfBI - tempContrastI * sumsOfAI[dx, dy]);
tempBrightnessQ = (1d / n) * (sumOfBQ - tempContrastQ * sumsOfAQ[dx, dy]);
tempRmsY = (1d / n) * (sumOfBYSquared + tempContrastY * (tempContrastY * sumsOfAYSquared[dx, dy] - 2 * sumOfAAndBY + 2 * tempBrightnessY * sumsOfAY[dx, dy]) + tempBrightnessY * (n * tempBrightnessY - 2 * sumOfBY));
tempRmsI = (1d / n) * (sumOfBISquared + tempContrastI * (tempContrastI * sumsOfAISquared[dx, dy] - 2 * sumOfAAndBI + 2 * tempBrightnessI * sumsOfAI[dx, dy]) + tempBrightnessI * (n * tempBrightnessI - 2 * sumOfBI));
tempRmsQ = (1d / n) * (sumOfBQSquared + tempContrastQ * (tempContrastQ * sumsOfAQSquared[dx, dy] - 2 * sumOfAAndBQ + 2 * tempBrightnessQ * sumsOfAQ[dx, dy]) + tempBrightnessQ * (n * tempBrightnessQ - 2 * sumOfBQ));
lock (finalResultLock)
{
//For each component, keep best transformation
if (finalRmsY > tempRmsY)
{
finalRmsY = tempRmsY;
bestRmsYIndexX = dx;
bestRmsYIndexY = dy;
bestRmsYTransformationIndex = i;
bestContrastY = tempContrastY;
bestBrightnessY = tempBrightnessY;
}
if (finalRmsI > tempRmsI)
{
finalRmsI = tempRmsI;
bestRmsIIndexX = dx;
bestRmsIIndexY = dy;
bestRmsITransformationIndex = i;
bestContrastI = tempContrastI;
bestBrightnessI = tempBrightnessI;
}
if (finalRmsQ > tempRmsQ)
{
finalRmsQ = tempRmsQ;
bestRmsQIndexX = dx;
bestRmsQIndexY = dy;
bestRmsQTransformationIndex = i;
bestContrastQ = tempContrastQ;
bestBrightnessQ = tempBrightnessQ;
}
}
}
}
}
//Save Di retained for Ri
lock (finalResultLock)
{
transformations[ry * rXCount + rx, 0] = new FractalCompressionResult.FractalTransformation(bestRmsYIndexX, bestRmsYIndexY, (byte)bestBrightnessY, (byte)bestContrastY, (byte)bestRmsYTransformationIndex);
transformations[ry * rXCount + rx, 1] = new FractalCompressionResult.FractalTransformation(bestRmsIIndexX, bestRmsIIndexY, (byte)bestBrightnessI, (byte)bestContrastI, (byte)bestRmsITransformationIndex);
transformations[ry * rXCount + rx, 2] = new FractalCompressionResult.FractalTransformation(bestRmsQIndexX, bestRmsQIndexY, (byte)bestBrightnessQ, (byte)bestContrastQ, (byte)bestRmsQTransformationIndex);
}
});
}
return(new FractalCompressionResult(transformations, (byte)Math.Ceiling(Math.Log(Math.Max(maxDxPos, maxDyPos), 2)), (short)rXCount));
}
/// <summary>
/// Compress image.
/// </summary>
/// <param name="image">Image to compress.</param>
/// <returns>Result of the compression.</returns>
public FractalCompressionResult Compress(CustomImage image)
{
//Validate the image and the params
if (image.Width % _options.RSquareSize > 0 || image.Height % _options.RSquareSize > 0 || _options.DSquareRatio <= 1)
{
throw new InvalidOperationException("The compression options specified can't compress this image as the R squares size is not a divisor of height and width. Ri Sizes must be divisor of Di sizes too.");
}
object finalResultLock = new object();
int rXCount = image.Width / _options.RSquareSize; //Number of R Squares in X
int rYCount = image.Height / _options.RSquareSize; //Number of R Squares in Y
int totalRCount = rXCount * rYCount;
byte dSquareSize = Convert.ToByte(_options.RSquareSize * _options.DSquareRatio);
int maxDxPos = image.Width - dSquareSize + 1;
int maxDyPos = image.Height - dSquareSize + 1;
byte dSize = dSquareSize;
byte rSize = _options.RSquareSize;
int n = _options.RSquareSize * _options.RSquareSize;
double drRatio = (double)_options.RSquareSize / (double)dSquareSize;
int drInverseRatio = dSquareSize / _options.RSquareSize;
double pixelAverageSquareSize = (double)drInverseRatio * (double)drInverseRatio;
var translateMatrixes = GetTranslateMatrixes(Convert.ToSByte(rSize));
int transformationsCount = _transformMatrixes.Length;
var transformations = new FractalCompressionResult.FractalTransformation[totalRCount, 3]; //Transformations (2 dimension to keep transformations for each ri in each color component)
int rx;
var rawImgData = image.ImageData;
var imgDataY = new byte[image.Width, image.Height];
var imgDataI = new short[image.Width, image.Height];
var imgDataQ = new short[image.Width, image.Height];
byte[, ][][,] tempDiY = new byte[maxDxPos, maxDyPos][][, ];
short[, ][][,] tempDiI = new short[maxDxPos, maxDyPos][][, ];
short[, ][][,] tempDiQ = new short[maxDxPos, maxDyPos][][, ];
int[,] sumsOfDY = new int[maxDxPos, maxDyPos];
int[,] sumsOfDYSquared = new int[maxDxPos, maxDyPos];
int[,] sumsOfDI = new int[maxDxPos, maxDyPos];
int[,] sumsOfDISquared = new int[maxDxPos, maxDyPos];
int[,] sumsOfDQ = new int[maxDxPos, maxDyPos];
int[,] sumsOfDQSquared = new int[maxDxPos, maxDyPos];
//Fill imgData Y, I and Q
Parallel.For(0, image.Width, dx =>
{
for (int dy = 0; dy < image.Height; dy++)
{
imgDataY[dx, dy] = rawImgData[dx, dy].Y;
imgDataI[dx, dy] = rawImgData[dx, dy].I;
imgDataQ[dx, dy] = rawImgData[dx, dy].Q;
}
});
//Average pixels of each Di to size of Ri
Parallel.For(0, maxDxPos, dx =>
{
int i, x, y, j, k, newX, newY, indexX = 0, indexY = 0;
sbyte[,] tempTransformMatrix;
sbyte[] tempTranslateMatrix;
byte[,] tempPixelY = null;
short[,] tempPixelI = null;
short[,] tempPixelQ = null;
int tempSumY = 0, tempSumI = 0, tempSumQ = 0;
byte tempAveragePixelY = 0;
short tempAveragePixelI = 0, tempAveragePixelQ = 0;
byte[,] tempDY = new byte[rSize, rSize];
short[,] tempDI = new short[rSize, rSize];
short[,] tempDQ = new short[rSize, rSize];
for (int dy = 0; dy < maxDyPos; dy++)
{
tempDiY[dx, dy] = new byte[transformationsCount][, ];
tempDiI[dx, dy] = new short[transformationsCount][, ];
tempDiQ[dx, dy] = new short[transformationsCount][, ];
for (i = 0; i < transformationsCount; i++)
{
tempPixelY = new byte[rSize, rSize];
tempPixelI = new short[rSize, rSize];
tempPixelQ = new short[rSize, rSize];
for (x = 0; x < dSize; x += drInverseRatio) //Increment of inverse ratio to get only parts of Di
{
for (y = 0; y < dSize; y += drInverseRatio)
{
//Get transformation
tempTransformMatrix = _transformMatrixes[i];
tempTranslateMatrix = translateMatrixes[i];
//Average pixels on first transform
if (i == 0)
{
//Reset temp variables
tempSumY = 0;
tempSumI = 0;
tempSumQ = 0;
//Average pixels
for (j = 0; j < drInverseRatio; j++)
{
for (k = 0; k < drInverseRatio; k++)
{
tempSumY += imgDataY[dx + x + j, dy + y + k];
tempSumI += imgDataI[dx + x + j, dy + y + k];
tempSumQ += imgDataQ[dx + x + j, dy + y + k];
}
}
//Calculating average Pixel Components
tempAveragePixelY = Convert.ToByte(tempSumY / pixelAverageSquareSize);
tempAveragePixelI = Convert.ToInt16(tempSumI / pixelAverageSquareSize);
tempAveragePixelQ = Convert.ToInt16(tempSumQ / pixelAverageSquareSize);
//Keep reference to subsampled Di.
tempDY[x / drInverseRatio, y / drInverseRatio] = tempAveragePixelY;
tempDI[x / drInverseRatio, y / drInverseRatio] = tempAveragePixelI;
tempDQ[x / drInverseRatio, y / drInverseRatio] = tempAveragePixelQ;
//Sum of "a" and "a^2" for future RMS calculation
sumsOfDY[dx, dy] += tempAveragePixelY;
sumsOfDI[dx, dy] += tempAveragePixelI;
sumsOfDQ[dx, dy] += tempAveragePixelQ;
sumsOfDYSquared[dx, dy] += tempAveragePixelY * tempAveragePixelY;
sumsOfDISquared[dx, dy] += tempAveragePixelI * tempAveragePixelI;
sumsOfDQSquared[dx, dy] += tempAveragePixelQ * tempAveragePixelQ;
}
newX = tempTransformMatrix[0, 0] * (x / drInverseRatio) + tempTransformMatrix[0, 1] * (y / drInverseRatio) + tempTranslateMatrix[0];
newY = tempTransformMatrix[1, 0] * (x / drInverseRatio) + tempTransformMatrix[1, 1] * (y / drInverseRatio) + tempTranslateMatrix[1];
indexX = x / drInverseRatio;
indexY = y / drInverseRatio;
//Store pixel components for transformed Di (Fi)
tempPixelY[newX, newY] = tempDY[indexX, indexY];
tempPixelI[newX, newY] = tempDI[indexX, indexY];
tempPixelQ[newX, newY] = tempDQ[indexX, indexY];
}
}
//Store pixels of Di
tempDiY[dx, dy][i] = tempPixelY;
tempDiI[dx, dy][i] = tempPixelI;
tempDiQ[dx, dy][i] = tempPixelQ;
}
}
});
//Find the Transformations to do...
//For each Ri
for (rx = 0; rx < rXCount; rx++)
{
//Parallel execution of for loop, so it runs faster.
Parallel.For(0, rYCount, ry =>
{
//Calculate the sums of components in Ri for future RMS metric calculation
int sumOfRY = 0;
int sumOfRYSquared = 0;
int sumOfRI = 0;
int sumOfRISquared = 0;
int sumOfRQ = 0;
int sumOfRQSquared = 0;
int sumOfDAndRY;
int sumOfDAndRI;
int sumOfDAndRQ;
int x, y, indexX, indexY, dx, dy, i, sYInt, oYInt, sIInt, oIInt, sQInt, oQInt,
bestRmsYIndexX = -1, bestRmsYIndexY = -1, bestRmsYTransformationIndex = -1,
bestRmsIIndexX = -1, bestRmsIIndexY = -1, bestRmsITransformationIndex = -1,
bestRmsQIndexX = -1, bestRmsQIndexY = -1, bestRmsQTransformationIndex = -1,
bestOY = 0, bestSY = 0,
bestOI = 0, bestSI = 0,
bestOQ = 0, bestSQ = 0;
byte[,] tempPixelY = null;
short[,] tempPixelI = null;
short[,] tempPixelQ = null;
double sY, oY,
sI, oI,
sQ, oQ,
tempRmsY, tempRmsI, tempRmsQ,
tempSYDenominator, tempSIDenominator, tempSQDenominator,
finalRmsY = Double.MaxValue, finalRmsI = Double.MaxValue, finalRmsQ = Double.MaxValue;
for (x = 0; x < rSize; x++)
{
for (y = 0; y < rSize; y++)
{
//Sum of "b" and of "b^2"
indexX = rx * rSize + x;
indexY = ry * rSize + y;
sumOfRY += imgDataY[indexX, indexY];
sumOfRI += imgDataI[indexX, indexY];
sumOfRQ += imgDataQ[indexX, indexY];
sumOfRYSquared += imgDataY[indexX, indexY] * imgDataY[indexX, indexY];
sumOfRISquared += imgDataI[indexX, indexY] * imgDataI[indexX, indexY];
sumOfRQSquared += imgDataQ[indexX, indexY] * imgDataQ[indexX, indexY];
}
}
//For Each Di
for (dx = 0; dx < maxDxPos; dx++)
{
for (dy = 0; dy < maxDyPos; dy++)
{
tempSYDenominator = n * sumsOfDYSquared[dx, dy] - sumsOfDY[dx, dy] * sumsOfDY[dx, dy];
tempSIDenominator = n * sumsOfDISquared[dx, dy] - sumsOfDI[dx, dy] * sumsOfDI[dx, dy];
tempSQDenominator = n * sumsOfDQSquared[dx, dy] - sumsOfDQ[dx, dy] * sumsOfDQ[dx, dy];
//For Each possible transformations
for (i = 0; i < transformationsCount; i++)
{
sumOfDAndRY = 0;
sumOfDAndRI = 0;
sumOfDAndRQ = 0;
tempPixelY = tempDiY[dx, dy][i];
tempPixelI = tempDiI[dx, dy][i];
tempPixelQ = tempDiQ[dx, dy][i];
//Compute sums necessary for calculating RMS metric
for (x = 0; x < rSize; x++)
{
indexX = rx * rSize + x;
for (y = 0; y < rSize; y++)
{
//Calculate indexX and indexY
indexY = ry * rSize + y;
//Sum of "ri*di"
sumOfDAndRY += tempPixelY[x, y] * imgDataY[indexX, indexY];
sumOfDAndRI += tempPixelI[x, y] * imgDataI[indexX, indexY];
sumOfDAndRQ += tempPixelQ[x, y] * imgDataQ[indexX, indexY];
}
}
//Compute contrast, brightness and RMS metric
sY = CalculateS(tempSYDenominator, n, sumOfDAndRY, sumsOfDY[dx, dy], sumOfRY, out sYInt);
sI = CalculateS(tempSIDenominator, n, sumOfDAndRI, sumsOfDI[dx, dy], sumOfRI, out sIInt);
sQ = CalculateS(tempSQDenominator, n, sumOfDAndRQ, sumsOfDQ[dx, dy], sumOfRQ, out sQInt);
oY = CalculateO(n, sY, sumOfRY, sumsOfDY[dx, dy], Y_LEVELS, out oYInt);
oI = CalculateO(n, sI, sumOfRI, sumsOfDI[dx, dy], I_LEVELS, out oIInt);
oQ = CalculateO(n, sQ, sumOfRQ, sumsOfDQ[dx, dy], Q_LEVELS, out oQInt);
tempRmsY = Math.Sqrt((sumOfRYSquared + sY * (sY * sumsOfDYSquared[dx, dy] - 2 * sumOfDAndRY + 2 * oY * sumsOfDY[dx, dy]) + oY * (n * oY - 2 * sumOfRY)) / n);
tempRmsI = Math.Sqrt((sumOfRISquared + sI * (sI * sumsOfDISquared[dx, dy] - 2 * sumOfDAndRI + 2 * oI * sumsOfDI[dx, dy]) + oI * (n * oI - 2 * sumOfRI)) / n);
tempRmsQ = Math.Sqrt((sumOfRQSquared + sQ * (sQ * sumsOfDQSquared[dx, dy] - 2 * sumOfDAndRQ + 2 * oQ * sumsOfDQ[dx, dy]) + oQ * (n * oQ - 2 * sumOfRQ)) / n);
if (Double.IsNaN(tempRmsY))
{
throw new Exception("SQRT IS NAN!");
}
if (Double.IsNaN(tempRmsI))
{
throw new Exception("SQRT IS NAN!");
}
if (Double.IsNaN(tempRmsQ))
{
throw new Exception("SQRT IS NAN!");
}
//For each component, keep best transformation
if (!Double.IsNaN(tempRmsY) && finalRmsY > tempRmsY)
{
finalRmsY = tempRmsY;
bestRmsYIndexX = dx;
bestRmsYIndexY = dy;
bestRmsYTransformationIndex = i;
bestSY = sYInt;
bestOY = oYInt;
}
if (!Double.IsNaN(tempRmsI) && finalRmsI > tempRmsI)
{
finalRmsI = tempRmsI;
bestRmsIIndexX = dx;
bestRmsIIndexY = dy;
bestRmsITransformationIndex = i;
bestSI = sIInt;
bestOI = oIInt;
}
if (!Double.IsNaN(tempRmsQ) && finalRmsQ > tempRmsQ)
{
finalRmsQ = tempRmsQ;
bestRmsQIndexX = dx;
bestRmsQIndexY = dy;
bestRmsQTransformationIndex = i;
bestSQ = sQInt;
bestOQ = oQInt;
}
}
}
}
//Save Di retained for Ri
transformations[ry * rXCount + rx, 0] = new FractalCompressionResult.FractalTransformation(bestRmsYIndexX, bestRmsYIndexY, Convert.ToByte(bestOY), Convert.ToByte(bestSY), Convert.ToByte(bestRmsYTransformationIndex));
transformations[ry * rXCount + rx, 1] = new FractalCompressionResult.FractalTransformation(bestRmsIIndexX, bestRmsIIndexY, Convert.ToByte(bestOI), Convert.ToByte(bestSI), Convert.ToByte(bestRmsITransformationIndex));
transformations[ry * rXCount + rx, 2] = new FractalCompressionResult.FractalTransformation(bestRmsQIndexX, bestRmsQIndexY, Convert.ToByte(bestOQ), Convert.ToByte(bestSQ), Convert.ToByte(bestRmsQTransformationIndex));
});
}
return(new FractalCompressionResult(transformations, Convert.ToByte(Math.Ceiling(Math.Log(Math.Max(maxDxPos, maxDyPos), 2))), Convert.ToInt16(rXCount)));
}
