static void MaskMinutiae(List <MutableMinutia> minutiae, BooleanMatrix mask)
{
minutiae.RemoveAll(minutia =>
{
var arrow = (-Parameters.MaskDisplacement * DoubleAngle.ToVector(minutia.Direction)).Round();
return(!mask.Get(minutia.Position + arrow, false));
});
}
static ConsideredOrientation[][] PlanOrientations()
{
var random = new OrientationRandom();
var splits = new ConsideredOrientation[Parameters.OrientationSplit][];
for (int i = 0; i < Parameters.OrientationSplit; ++i)
{
var orientations = splits[i] = new ConsideredOrientation[Parameters.OrientationsChecked];
for (int j = 0; j < Parameters.OrientationsChecked; ++j)
{
var sample = orientations[j] = new ConsideredOrientation();
while (true)
{
double angle = random.Next() * Math.PI;
double distance = Doubles.InterpolateExponential(Parameters.MinOrientationRadius, Parameters.MaxOrientationRadius, random.Next());
sample.Offset = (distance * DoubleAngle.ToVector(angle)).Round();
if (sample.Offset == IntPoint.Zero)
{
continue;
}
if (sample.Offset.Y < 0)
{
continue;
}
bool duplicate = false;
for (int jj = 0; jj < j; ++jj)
{
if (orientations[jj].Offset == sample.Offset)
{
duplicate = true;
}
}
if (duplicate)
{
continue;
}
break;
}
sample.Orientation = DoubleAngle.ToVector(DoubleAngle.Add(DoubleAngle.ToOrientation(DoubleAngle.Atan((DoublePoint)sample.Offset)), Math.PI));
}
}
return(splits);
}
static IntPoint[][] OrientedLines(int resolution, int radius, double step)
{
var result = new IntPoint[resolution][];
for (int orientationIndex = 0; orientationIndex < resolution; ++orientationIndex)
{
var line = new List <IntPoint>();
line.Add(IntPoint.Zero);
var direction = DoubleAngle.ToVector(DoubleAngle.FromOrientation(DoubleAngle.BucketCenter(orientationIndex, resolution)));
for (double r = radius; r >= 0.5; r /= step)
{
var sample = (r * direction).Round();
if (!line.Contains(sample))
{
line.Add(sample);
line.Add(-sample);
}
}
result[orientationIndex] = line.ToArray();
}
return(result);
}
