public FingerprintTemplate(byte[,] image, int dpi = 500)
{
const int blockSize = 15;
if (dpi != 500)
{
image = ScaleImage(image, dpi);
}
image = InvertInput(image);
var blocks = new BlockMap(new Point(image.GetLength(1), image.GetLength(0)), blockSize);
var histogram = ComputeHistogram(blocks, image);
var smoothHistogram = ComputeSmoothedHistogram(blocks, histogram);
var mask = ComputeMask(blocks, histogram);
double[,] equalized = Equalize(blocks, image, smoothHistogram, mask);
byte[,] orientation = ComputeOrientationMap(equalized, mask, blocks);
double[,] smoothed = SmoothByOrientation(equalized, orientation, mask, blocks, 0, ConstructOrientedLines(step: 1.59));
double[,] orthogonal = SmoothByOrientation(smoothed, orientation, mask, blocks, Angle.PIB,
ConstructOrientedLines(resolution: 11, radius: 4, step: 1.11));
var binary = Binarize(smoothed, orthogonal, mask, blocks);
CleanupBinarized(binary);
BitmapUtils.ShowImage(binary);
var pixelMask = FillBlocks(mask, blocks);
var innerMask = ComputeInnerMask(pixelMask);
var inverted = Invert(binary, pixelMask);
FingerprintSkeleton ridges = new FingerprintSkeleton(binary);
FingerprintSkeleton valleys = new FingerprintSkeleton(inverted);
CollectMinutiae(ridges, FingerprintMinutiaType.Ending);
CollectMinutiae(valleys, FingerprintMinutiaType.Bifurcation);
ApplyMask(innerMask);
RemoveMinutiaClouds();
LimitTemplateSize();
ShuffleMinutiae();
BuildEdgeTable();
}
void CollectMinutiae(FingerprintSkeleton skeleton, FingerprintMinutiaType type)
{
foreach (SkeletonMinutia skeletonMinutia in skeleton.Minutiae)
{
if (skeletonMinutia.IsConsidered && skeletonMinutia.Ridges.Count == 1)
{
FingerprintMinutia templateMinutia = new FingerprintMinutia();
templateMinutia.Type = type;
templateMinutia.Position = skeletonMinutia.Position;
templateMinutia.Direction = skeletonMinutia.Ridges[0].ComputeDirection();
Minutiae.Add(templateMinutia);
}
}
}
