/// <summary>
/// Dilate a <see cref="OneBppImage"/>
/// </summary>
public OneBppImage Dilate(OneBppImage source)
{
byte[,] data = new byte[source.Width, source.Height];
for (int y = 0; y < source.Height; y++)
{
for (int x = 0; x < source.Width; x++)
{
byte pointValue = Constants.PIXEL_VALUE_WHITESPACE;
foreach (Point p in StructuralElement.ExaminePoints)
{
int testX = x + p.X;
int testY = y + p.Y;
if (testX < 0 || testY < 0 || testX >= source.Width || testY >= source.Height)
{
continue;
}
if (source.ImageData[testX, testY] == Constants.PIXEL_VALUE_INK)
{
pointValue = Constants.PIXEL_VALUE_INK;
break;
}
}
data[x, y] = pointValue;
}
}
return new OneBppImage(data);
}
/// <summary>
/// Erode a <see cref="OneBppImage"/>
/// </summary>
public OneBppImage Erode(OneBppImage source)
{
byte[,] data = new byte[source.Width, source.Height];
for (int y = 0; y < source.Height; y++)
{
for (int x = 0; x < source.Width; x++)
{
if (source.ImageData[x, y] == Constants.PIXEL_VALUE_INK)
{
foreach (Point p in StructuralElement.ExaminePoints)
{
int testX = x + p.X;
int testY = y + p.Y;
if (testX < 0 || testY < 0 || testX >= source.Width || testY >= source.Height)
{
data[x, y] = Constants.PIXEL_VALUE_WHITESPACE;
goto NextPixel;
}
if (source.ImageData[testX, testY] != Constants.PIXEL_VALUE_INK)
{
data[x, y] = Constants.PIXEL_VALUE_WHITESPACE;
goto NextPixel;
}
}
data[x, y] = Constants.PIXEL_VALUE_INK;
}
else
{
data[x, y] = Constants.PIXEL_VALUE_WHITESPACE;
}
NextPixel: ; // continue
}
}
return new OneBppImage(data);
}
/// <summary>
/// Perform a morphological closing on a <see cref="OneBppImage"/>
/// </summary>
public OneBppImage Close(OneBppImage source)
{
return Erode(Dilate(source));
}
/// <summary>
/// Perform a morphological opening on a <see cref="OneBppImage"/>
/// </summary>
public OneBppImage Open(OneBppImage source)
{
return Dilate(Erode(source));
}
