public Image GetWaveletsImages(
float[][] spectrum,
IStride strideBetweenConsecutiveImages,
int fingerprintLength,
int overlap,
int imagesPerRow)
{
List <float[][]> spetralImages = spectrumService.CutLogarithmizedSpectrum(
spectrum, strideBetweenConsecutiveImages, fingerprintLength, overlap);
waveletDecomposition.DecomposeImagesInPlace(spetralImages);
int width = spetralImages[0].GetLength(0);
int height = spetralImages[0][0].Length;
int fingersCount = spetralImages.Count;
int rowCount = (int)Math.Ceiling((float)fingersCount / imagesPerRow);
int imageWidth = (imagesPerRow * (width + SpaceBetweenImages)) + SpaceBetweenImages;
int imageHeight = (rowCount * (height + SpaceBetweenImages)) + SpaceBetweenImages;
Bitmap image = new Bitmap(imageWidth, imageHeight, PixelFormat.Format16bppRgb565);
SetBackground(image, Color.White);
int verticalOffset = SpaceBetweenImages;
int horizontalOffset = SpaceBetweenImages;
int count = 0;
foreach (float[][] spectralImage in spetralImages)
{
double average = spectralImage.Average(col => col.Average(v => Math.Abs(v)));
for (int i = 0; i < width /*128*/; i++)
{
for (int j = 0; j < height /*32*/; j++)
{
Color color = ValueToBlackWhiteColor(spectralImage[i][j], average);
image.SetPixel(i + horizontalOffset, j + verticalOffset, color);
}
}
count++;
if (count % imagesPerRow == 0)
{
verticalOffset += height + SpaceBetweenImages;
horizontalOffset = SpaceBetweenImages;
}
else
{
horizontalOffset += width + SpaceBetweenImages;
}
}
return(image);
}
private List <bool[]> CreateFingerprintsFromLogSpectrum(float[][] logarithmizedSpectrum, IStride stride, int fingerprintLength, int overlap, int topWavelets)
{
List <float[][]> spectralImages = spectrumService.CutLogarithmizedSpectrum(logarithmizedSpectrum, stride, fingerprintLength, overlap);
waveletDecomposition.DecomposeImagesInPlace(spectralImages);
var fingerprints = new List <bool[]>();
foreach (var spectralImage in spectralImages)
{
bool[] image = fingerprintDescriptor.ExtractTopWavelets(spectralImage, topWavelets);
if (!IsSilence(image))
{
fingerprints.Add(image);
}
}
return(fingerprints);
}
