private void InitializeAreaMatrix(ImageWrapper image)
{
this._areaMatrix = new int[image.Height][];
for (int i = 0; i < image.Height; ++i)
{
this._areaMatrix[i] = new int[image.Width];
}
}
private void FillPolygons(ImageWrapper image)
{
for (int i = 0; i < image.Height; ++i)
{
for (int j = 0; j < image.Width; ++j)
{
if (this._areaMatrix[i][j] != 0)
{
this._polygons[this._areaMatrix[i][j]].Pixels.Add(new Pixel(i, j, image[i, j]));
}
}
}
}
public void Process(ImageWrapper imageWrapper)
{
this._histogramm = imageWrapper.GetHistogramm();
int threshold = this.GetBestThreshold();
for (int i = 0; i < imageWrapper.Height; ++i)
{
for (int j = 0; j < imageWrapper.Width; ++j)
{
imageWrapper[i, j] = imageWrapper[i, j] < threshold ? (byte)0 : byte.MaxValue;
}
}
}
public IList<Polygon> Process(ImageWrapper image)
{
this.InitializeAreaMatrix(image);
this.InitializeObjectColor(image);
this.PerformLabeling(image);
this.ResolveEqualityChains();
this.LinkPolygons();
this.FillPolygons(image);
IList<Polygon> result = this.GetPolygons();
this._equalityClasses.Clear();
this._equalityChains.Clear();
this._polygons.Clear();
return result;
}
public ImageProcessor(string fileName)
{
this._image = new Bitmap(fileName);
this._imageWrapper = new ImageWrapper(this._image);
}
public ImageProcessor(Bitmap image)
{
this._image = image;
this._imageWrapper = new ImageWrapper(image);
}
private void InitializeObjectColor(ImageWrapper imageWrapper)
{
int blackPixels = imageWrapper.GetColoredPixels(0);
int whitePixels = imageWrapper.GetColoredPixels(byte.MaxValue);
this._objectColor = Math.Min(blackPixels, whitePixels) == blackPixels ? 0 : byte.MaxValue;
}
private void PerformLabeling(ImageWrapper image)
{
this._areaCount = 1;
for (int i = 1; i < image.Height; ++i)
{
for (int j = 1; j < image.Width; ++j)
{
if (image[i, j] == this._objectColor)
{
int upperNeighbor = this._areaMatrix[i - 1][j];
int leftNeighbor = this._areaMatrix[i][j - 1];
if (upperNeighbor == 0 && leftNeighbor == 0)
{
this._areaMatrix[i][j] = this._areaCount++;
continue;
}
if (upperNeighbor != 0 && leftNeighbor == 0)
{
this._areaMatrix[i][j] = upperNeighbor;
continue;
}
if (upperNeighbor == 0 && leftNeighbor != 0)
{
this._areaMatrix[i][j] = leftNeighbor;
continue;
}
if (upperNeighbor != 0 && leftNeighbor != 0 && upperNeighbor == leftNeighbor)
{
this._areaMatrix[i][j] = upperNeighbor;
continue;
}
this._areaMatrix[i][j] = upperNeighbor;
this._equalityClasses.Add(new Tuple<int, int>(upperNeighbor, leftNeighbor));
}
}
}
}
