public void FloodFillTest2(string filename)
{
var path = GetTestDataPath(filename);
var image = new Bitmap(path);
var mask = image.ToByteArray();
Assert.IsTrue(mask.Any(x => x == 0));
Assert.IsTrue(mask.Any(x => x == 1));
Assert.IsTrue(mask.Length == image.Width * image.Height);
var actual = new Volume2D <byte>(mask, image.Width, image.Height, 1, 1, new Point2D(), new Matrix2());
var contoursFilled = actual.ContoursFilled();
var expected = actual.CreateSameSize <byte>();
expected.Fill(contoursFilled, (byte)1);
var stopwatch = Stopwatch.StartNew();
FillPolygon.FloodFillHoles(actual.Array, expected.DimX, expected.DimY, 0, 0, 1, 0);
stopwatch.Stop();
actual.SaveBrushVolumeToPng(@"C:\Temp\Actual.png");
expected.SaveBrushVolumeToPng(@"C:\Temp\Expected.png");
Assert.AreEqual(expected.Array, actual.Array, "Extracting filled contours and filling those should give the same result as flood filling holes.");
var contoursWithHoles = actual.ContoursWithHoles();
var filledWithHoles = actual.CreateSameSize <byte>();
filledWithHoles.Fill(contoursWithHoles, (byte)1);
Assert.AreEqual(actual.Array, filledWithHoles.Array, "Extracting contours with holes and filling those in should not change the mask");
}
/// <summary>
/// Creates volume of the same size as the argument, with pixel values equal to 1 for all
/// pixels that have the given <paramref name="foregroundId"/>, and pixel value 0 for all others.
/// </summary>
/// <param name="volume"></param>
/// <param name="foregroundId">The voxel value that should be considered foreground.</param>
/// <returns></returns>
private static Volume2D <byte> CreateBinaryVolume(Volume2D <byte> volume, byte foregroundId)
{
var binaryVolume = volume.CreateSameSize <byte>();
var binaryArray = binaryVolume.Array;
var volumeArray = volume.Array;
for (var index = 0; index < volumeArray.Length; index++)
{
binaryArray[index] = volumeArray[index] == foregroundId ? (byte)1 : (byte)0;
}
return(binaryVolume);
}