void PrintStatisticInfo(StatisticInfo statisticInfo, string colorComponentName)
{
textBox1.Text += Environment.NewLine + "Складова " + colorComponentName + Environment.NewLine;
textBox1.Text += String.Format("Average error: {0:0.0000}{1}", statisticInfo.averageError, Environment.NewLine);
textBox1.Text += String.Format("Sigma: {0:0.0000}{1}", statisticInfo.sigma, Environment.NewLine);
textBox1.Text += String.Format("PSNR: {0:0.0000}{1}", statisticInfo.PSNR, Environment.NewLine);
}
private static void FillSigma(StatisticInfo statisticInfo)
{
double disp = 0;
int N = statisticInfo.eps.Length;
for (int i = 0; i < N; i++)
{
disp += (statisticInfo.eps[i] - statisticInfo.averageError).Pow(2);
}
statisticInfo.sigma = Math.Sqrt(disp / (N - 1));
}
public static StatisticInfo[] GetStatistics(double[,,] imageA, double[,,] imageB)
{
StatisticInfo r = AverageErrorR(imageA, imageB);
StatisticInfo g = AverageErrorG(imageA, imageB);
StatisticInfo b = AverageErrorB(imageA, imageB);
FillSigma(r);
FillSigma(g);
FillSigma(b);
FillPSNR(r);
FillPSNR(g);
FillPSNR(b);
return(new[] { r, g, b });
}
private static StatisticInfo AverageError(double[,,] imageA, double[,,] imageB, int color)
{
if (color < 0 || color > 2)
{
throw new Exception("Invalid value of 'color' parameter");
}
int heightA = imageA.GetLength(1);
int widthA = imageA.GetLength(2);
int heightB = imageB.GetLength(1);
int widthB = imageA.GetLength(2);
int minHeight = Math.Min(heightA, heightB);
int minWidth = Math.Min(widthA, widthB);
//if((heightA != heightB) || (widthA != widthB))
// throw new Exception("Images must have the same size");
StatisticInfo res = new StatisticInfo();
res.eps = new double[minHeight * minWidth];
for (int i = 0; i < minHeight; i++)
{
for (int j = 0; j < minWidth; j++)
{
double eps = imageA[color, i, j] - imageB[color, i, j];
res.averageError += eps;
res.eps[i * heightA + j] = eps;
}
}
res.averageError /= (minHeight * minWidth);
return(res);
}
private static void FillPSNR(StatisticInfo statisticInfo)
{
statisticInfo.PSNR = 10 * Math.Log10(255 * 255d / (statisticInfo.sigma * statisticInfo.sigma));
}
