/// <summary>
/// Fills hole by approximation of its 8-connected non-hole pixels; Does so in a spiral fashion.
/// Throws error if hole touches the edges of the image.
/// </summary>
public void FillHoleApproximateConnected(Hole hole)
{
if (hole.CoveringRectangle.TopRight.Value == -1 ||
hole.CoveringRectangle.BottomLeft.Value == -1 ||
hole.CoveringRectangle.TopLeft.Value == -1 ||
hole.CoveringRectangle.BottomRight.Value == -1)
{
throw new Exception("Better-Approximation does not work if the hole touches the edges of the image.");
}
var spiralTraverser = new SpiralTraverser(hole.CoveringRectangle, _image);
foreach (var pix in spiralTraverser)
{
if (pix.Value == -1)
{
var array = new Pixel[]
{
_image.GetDistantElement(pix, 0, -1),
_image.GetDistantElement(pix, -1, -1),
_image.GetDistantElement(pix, -1, 0),
_image.GetDistantElement(pix, -1, 1),
_image.GetDistantElement(pix, 0, 1),
_image.GetDistantElement(pix, 1, 1),
_image.GetDistantElement(pix, 1, 0),
_image.GetDistantElement(pix, 1, -1)
}
.Where(x => x != null && x.Value != -1);
var sum = array.Sum(x => x.Value);
var count = array.Count();
pix.Value = sum / count;
}
}
_image.IsHoled = false;
}
