/// <summary>
/// Returns the correct CongealParameters that will yield a best-aligned shape.
/// Aligns by brute-forcing through 90-degree rotations
/// </summary>
/// <param name="toalign">The image to align. Will not be modified (i.e., aligned) by this function</param>
/// <returns>The correct number of degrees to rotate</returns>
public double align(SymbolRec.Image.Image toalign)
{
SymbolRec.Image.Image rotated;
Metrics.ImageDistance d = new Metrics.ImageDistance(_trained, toalign);
int rotbest = 0;
double dbest = d.ModifiedHausdorff;
for (int rotation = 90; rotation < 360; rotation += 90)
{
rotated = toalign.rotate(DtR(rotation), toalign.WeightedCenter[0], toalign.WeightedCenter[1]);
d = new Metrics.ImageDistance(_trained, rotated);
double dnew = d.ModifiedHausdorff;
if (dnew < dbest)
{
dbest = dnew;
rotbest = rotation;
}
}
return(rotbest);
}
/// <summary>
/// Align a shape by brute-forcing through 90-degree rotations
/// and seeing which one yields the best results
/// </summary>
/// <param name="toalign">The shape to align (will not be mutated)</param>
/// <returns>The aligned shape</returns>
public Sketch.Shape align(Sketch.Shape toalign)
{
Sketch.Shape aligned = toalign.Clone();
SymbolRec.Image.Image i = new SymbolRec.Image.Image(_trained.Width, _trained.Height, new SymbolRec.Substrokes(aligned.SubstrokesL));
Metrics.ImageDistance d = new Metrics.ImageDistance(_trained, i);
int rotbest = 0;
double dbest = d.ModifiedHausdorff;
for (int rotation = 90; rotation < 360; rotation += 90)
{
aligned.rotate(DtR(rotation));
i = new SymbolRec.Image.Image(_trained.Width, _trained.Height, new SymbolRec.Substrokes(toalign.SubstrokesL));
d = new Metrics.ImageDistance(_trained, i);
double dnew = d.ModifiedHausdorff;
if (dnew < dbest)
{
dbest = dnew;
rotbest = rotation;
}
aligned.rotate(-DtR(rotation));
}
aligned.rotate(DtR(rotbest));
return(aligned);
}
/// <summary>
/// Constructs a new BFFWA
/// </summary>
/// <param name="trainedBitmap">A trained AvgImage</param>
public BruteForceFourWayAlign(SymbolRec.Image.Image trainedBitmap)
{
_trained = trainedBitmap;
}
