public static bool Solve(Bitmap puzzle, out int offsetX)
{
if (puzzle == null)
{
offsetX = 0;
return(false);
}
using (Bitmap test = new GrayscaleBT709().Apply(puzzle))
{
BitmapData data = test.LockBits(new Rectangle(0, 0, test.Width, test.Height), ImageLockMode.ReadWrite, test.PixelFormat);
byte[] points = new byte[data.Stride * test.Height];
Marshal.Copy(data.Scan0, points, 0, points.Length);
for (int y = 0; y < test.Height; y++)
{
for (int x = 0; x < data.Stride; x++)
{
int i = y * data.Stride + x;
if (x > 50 && x < data.Stride - 10 && points[i] - points[i + 1] > 80)
{
points[i] = points[i + 1];
}
else
{
points[i] = 255;
}
}
}
Marshal.Copy(points, 0, data.Scan0, points.Length);
test.UnlockBits(data);
new Invert().ApplyInPlace(test);
new BlobsFiltering {
MinHeight = 5, MaxWidth = 1
}.ApplyInPlace(test);
BlobCounter counter = new BlobCounter();
counter.ObjectsOrder = ObjectsOrder.Size;
counter.ProcessImage(test);
Rectangle[] blobs = counter.GetObjectsRectangles();
offsetX = blobs.Length == 1 ? blobs[0].X - 5 : blobs.Length == 2 && blobs[0].X == blobs[1].X ? blobs[0].X - 5 : 0;
return(offsetX > 0);
}
}