/// <summary>
/// Used to normalise a spectrogram in 0,1.
/// </summary>
/// <param name="matrix">the spectrogram data.</param>
/// <param name="truncateMin">set all values above to 1.0.</param>
/// <param name="truncateMax">set all values below to zero.</param>
/// <param name="backgroundFilterCoeff">used to de-emphisize the background.</param>
/// <returns>a normalised matrix of spectrogram data.</returns>
public static double[,] NormaliseSpectrogramMatrix(double[,] matrix, double truncateMin, double truncateMax, double backgroundFilterCoeff)
{
double[,] m = MatrixTools.NormaliseInZeroOne(matrix, truncateMin, truncateMax);
m = MatrixTools.FilterBackgroundValues(m, backgroundFilterCoeff); // to de-demphasize the background small values
return(m);
}
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public static double[,] NormaliseSpectrogramMatrix(IndexProperties indexProperties, double[,] matrix, double backgroundFilterCoeff)
{
matrix = MatrixTools.NormaliseInZeroOne(matrix, indexProperties.NormMin, indexProperties.NormMax);
matrix = MatrixTools.FilterBackgroundValues(matrix, backgroundFilterCoeff); // to de-demphasize the background small values
return(matrix);
}
