public static MutableTemplate Extract(DoubleMatrix raw, double dpi)
{
var template = new MutableTemplate();
// https://sourceafis.machinezoo.com/transparency/decoded-image
FingerprintTransparency.Current.Log("decoded-image", raw);
if (Math.Abs(dpi - 500) > Parameters.DpiTolerance)
{
raw = ScaleImage(raw, dpi);
}
// https://sourceafis.machinezoo.com/transparency/scaled-image
FingerprintTransparency.Current.Log("scaled-image", raw);
template.Size = raw.Size;
var blocks = new BlockMap(raw.Width, raw.Height, Parameters.BlockSize);
// https://sourceafis.machinezoo.com/transparency/blocks
FingerprintTransparency.Current.Log("blocks", blocks);
var histogram = Histogram(blocks, raw);
var smoothHistogram = SmoothHistogram(blocks, histogram);
var mask = Mask(blocks, histogram);
var equalized = Equalize(blocks, raw, smoothHistogram, mask);
var orientation = OrientationMap(equalized, mask, blocks);
var smoothedLines = OrientedLines(Parameters.ParallelSmoothingResolution, Parameters.ParallelSmoothingRadius, Parameters.ParallelSmoothingStep);
var smoothed = SmoothRidges(equalized, orientation, mask, blocks, 0, smoothedLines);
// https://sourceafis.machinezoo.com/transparency/parallel-smoothing
FingerprintTransparency.Current.Log("parallel-smoothing", smoothed);
var orthogonalLines = OrientedLines(Parameters.OrthogonalSmoothingResolution, Parameters.OrthogonalSmoothingRadius, Parameters.OrthogonalSmoothingStep);
var orthogonal = SmoothRidges(smoothed, orientation, mask, blocks, Math.PI, orthogonalLines);
// https://sourceafis.machinezoo.com/transparency/orthogonal-smoothing
FingerprintTransparency.Current.Log("orthogonal-smoothing", orthogonal);
var binary = Binarize(smoothed, orthogonal, mask, blocks);
var pixelMask = FillBlocks(mask, blocks);
CleanupBinarized(binary, pixelMask);
// https://sourceafis.machinezoo.com/transparency/pixel-mask
FingerprintTransparency.Current.Log("pixel-mask", pixelMask);
var inverted = Invert(binary, pixelMask);
var innerMask = InnerMask(pixelMask);
var ridges = new Skeleton(binary, SkeletonType.Ridges);
var valleys = new Skeleton(inverted, SkeletonType.Valleys);
template.Minutiae = new List <MutableMinutia>();
CollectMinutiae(template.Minutiae, ridges, MinutiaType.Ending);
CollectMinutiae(template.Minutiae, valleys, MinutiaType.Bifurcation);
// https://sourceafis.machinezoo.com/transparency/skeleton-minutiae
FingerprintTransparency.Current.Log("skeleton-minutiae", template);
MaskMinutiae(template.Minutiae, innerMask);
// https://sourceafis.machinezoo.com/transparency/inner-minutiae
FingerprintTransparency.Current.Log("inner-minutiae", template);
RemoveMinutiaClouds(template.Minutiae);
// https://sourceafis.machinezoo.com/transparency/removed-minutia-clouds
FingerprintTransparency.Current.Log("removed-minutia-clouds", template);
template.Minutiae = LimitTemplateSize(template.Minutiae);
// https://sourceafis.machinezoo.com/transparency/top-minutiae
FingerprintTransparency.Current.Log("top-minutiae", template);
return(template);
}
MutableTemplate Mutable()
{
var mutable = new MutableTemplate();
mutable.Size = Size;
mutable.Minutiae = (from m in Minutiae select m.Mutable()).ToList();
return(mutable);
}
public MutableTemplate Mutable()
{
var mutable = new MutableTemplate();
mutable.Size = new IntPoint(Width, Height);
mutable.Minutiae = new List <MutableMinutia>();
for (int i = 0; i < Types.Length; ++i)
{
var type = Types[i] == 'B' ? MinutiaType.Bifurcation : MinutiaType.Ending;
mutable.Minutiae.Add(new MutableMinutia(new IntPoint(PositionsX[i], PositionsY[i]), Directions[i], type));
}
return(mutable);
}
FingerprintTemplate(MutableTemplate mutable)
{
Size = mutable.Size;
var minutiae =
from m in mutable.Minutiae
orderby((m.Position.X * Prime) + m.Position.Y) * Prime, m.Position.X, m.Position.Y, m.Direction, m.Type
select new ImmutableMinutia(m);
Minutiae = minutiae.ToArray();
// https://sourceafis.machinezoo.com/transparency/shuffled-minutiae
FingerprintTransparency.Current.Log("shuffled-minutiae", () => Mutable());
Edges = NeighborEdge.BuildTable(Minutiae);
}
public PersistentTemplate(MutableTemplate mutable)
{
Version = FingerprintCompatibility.Version;
Width = mutable.Size.X;
Height = mutable.Size.Y;
int count = mutable.Minutiae.Count;
PositionsX = new int[count];
PositionsY = new int[count];
Directions = new double[count];
var chars = new char[count];
for (int i = 0; i < count; ++i)
{
var minutia = mutable.Minutiae[i];
PositionsX[i] = minutia.Position.X;
PositionsY[i] = minutia.Position.Y;
Directions[i] = minutia.Direction;
chars[i] = minutia.Type == MinutiaType.Bifurcation ? 'B' : 'E';
}
Types = new string(chars);
}
