/// <summary>
/// Encodes the specified <see cref="OrientationImage"/> into a byte array.
/// </summary>
/// <remarks>
/// This codification stores <see cref="OrientationImage.Width"/> in the first byte; <see cref="OrientationImage.Height"/> in the second byte; <see cref="OrientationImage.Width"/> in the third byte; and uses one byte for each orientation value. Therefore, this method is ineffective for values of <see cref="OrientationImage.WindowSize"/>, <see cref="OrientationImage.Height"/> and <see cref="OrientationImage.Width"/> greater than 255.
/// </remarks>
/// <param name="orImg">The <see cref="OrientationImage"/> which is going to be encoded to a byte array.</param>
/// <returns>The byte array containing the encoded <see cref="OrientationImage"/>.</returns>
public static byte[] ToByteArray(OrientationImage orImg)
{
byte[] bytes = new byte[orImg.Width * orImg.Height + 3];
bytes[0] = orImg.WindowSize;
bytes[1] = orImg.Height;
bytes[2] = orImg.Width;
int k = 3;
for (int i = 0; i < orImg.Height; i++)
for (int j = 0; j < orImg.Width; j++)
if (orImg.IsNullBlock(i, j))
bytes[k++] = 255;
else
bytes[k++] = Convert.ToByte(Math.Round(orImg.AngleInRadians(i, j) * 180 / Math.PI));
return bytes;
}
/// <summary>
/// Encodes the specified <see cref="OrientationImage"/> into a byte array.
/// </summary>
/// <remarks>
/// This codification stores <see cref="OrientationImage.Width"/> in the first byte; <see cref="OrientationImage.Height"/> in the second byte; <see cref="OrientationImage.Width"/> in the third byte; and uses one byte for each orientation value. Therefore, this method is ineffective for values of <see cref="OrientationImage.WindowSize"/>, <see cref="OrientationImage.Height"/> and <see cref="OrientationImage.Width"/> greater than 255.
/// </remarks>
/// <param name="orImg">The <see cref="OrientationImage"/> which is going to be encoded to a byte array.</param>
/// <returns>The byte array containing the encoded <see cref="OrientationImage"/>.</returns>
public static byte[] ToByteArray(OrientationImage orImg)
{
byte[] bytes = new byte[orImg.Width * orImg.Height + 3];
bytes[0] = orImg.WindowSize;
bytes[1] = orImg.Height;
bytes[2] = orImg.Width;
int k = 3;
for (int i = 0; i < orImg.Height; i++)
{
for (int j = 0; j < orImg.Width; j++)
{
if (orImg.IsNullBlock(i, j))
{
bytes[k++] = 255;
}
else
{
bytes[k++] = Convert.ToByte(Math.Round(orImg.AngleInRadians(i, j) * 180 / Math.PI));
}
}
}
return(bytes);
}
private double[] GetOrientations(int radio, Minutia mtia, OrientationImage dirImg)
{
double[] currOrientations = new double[radio / 3];
int n = radio / 3;
double incAng = 2 * Math.PI * 3.0 / radio;
for (int i = 0; i < n; i++)
{
double myAng = mtia.Angle + i * incAng;
if (myAng > 2 * Math.PI)
myAng -= (double)(2 * Math.PI);
Point pnt = SetPosToSPoint(myAng, radio, new Point(mtia.X, mtia.Y));
int row, col;
dirImg.GetBlockCoordFromPixel(pnt.X, pnt.Y, out row, out col);
if ((col < 0) || (row < 0) || (row >= dirImg.Height) ||
(col >= dirImg.Width) || (dirImg.IsNullBlock(row, col)))
currOrientations[i] = double.NaN;
else
currOrientations[i] =
Math.Min(Angle.DifferencePi(mtia.Angle, dirImg.AngleInRadians(row, col)),
Angle.DifferencePi(mtia.Angle, dirImg.AngleInRadians(row, col) + Math.PI));
}
return currOrientations;
}
internal Segment(double ang, Minutia mnt, OrientationImage dImg)
{
bool endOfPoints = false;
int i = 1;
List<double> points = new List<double>();
while (!endOfPoints)
{
Point pnt = SetPosToSPoint(ang, i*interval, new Point(mnt.X, mnt.Y));
if (IsInBound(pnt, dImg))
{
int row, col;
dImg.GetBlockCoordFromPixel(pnt.X, pnt.Y, out row, out col);
if ((col < 0) || (row < 0) || (row >= dImg.Height) ||
(col >= dImg.Width) || (dImg.IsNullBlock(row, col)))
points.Add(double.NaN);
else
points.Add(Math.Min(Angle.DifferencePi(mnt.Angle, dImg.AngleInRadians(row, col)),
Angle.DifferencePi(mnt.Angle, dImg.AngleInRadians(row, col) + Math.PI)));
i++;
}
else
endOfPoints = true;
}
bool isLastNan = false;
int j = points.Count - 1;
while (!isLastNan && j >= 0)
{
if (double.IsNaN(points[j]))
{
points.RemoveAt(j);
j--;
}
else
isLastNan = true;
}
directions = points.ToArray();
}
