private ObjectLayer Execute2ndLevelSegmentation(ObjectLayer l1stLevel, GrayscaleProcessor p)
{
ObjectLayer layer = l1stLevel.CreateAbove(obj =>
{
return(true);
});
double[] background = GetBackgroundHistogram(layer, p);
double[] foreground = GetForegroundHistogram(layer, p);
while (true)
{
bool removed = false;
layer = layer.CreateAbove(obj =>
{
int[] histogram = GetHistogram(obj, p);
double ratioForeground = GetRatioForeground(histogram, foreground, background);
if (ratioForeground > 0.5)
{
return(true);
}
for (int i = 0; i < 256; i++)
{
int val = histogram[i];
background[i] += val;
foreground[i] -= val;
}
removed = true;
return(false);
});
if (!removed)
{
break;
}
}
return(layer);
}
private ObjectLayer Execute1stLevelSegmentation(GrayscaleProcessor p, GrayscaleProcessor pSobel)
{
ContourBasedSegmentation cbs = new ContourBasedSegmentation();
cbs.CreatePrimarySegmentation(p, MAX_CONTOURLENGTH);
cbs.EvaluateContours(pSobel);
ObjectLayer layer = cbs.CreateLayer();
layer = layer.CreateAbove(obj =>
{
return(GetContourGradient(obj, p) > 0);
});
return(layer);
}
private ObjectLayer Execute2ndLevelSegmentation(GrayscaleProcessor gp, GrayscaleProcessor gpSobel, GrayscaleProcessor gpH, float targetArea)
{
ContourBasedSegmentation cbs = new ContourBasedSegmentation();
cbs.CreatePrimarySegmentation(gp, MAX_CONTOURLENGTH);
cbs.EvaluateContours(c =>
{
return(this.GetContourValue(c, gpSobel, gpH, targetArea));
});
ObjectLayer layer = cbs.CreateLayer(MIN_CONTOURLENGTH, int.MaxValue);
layer = layer.CreateAbove(obj =>
{
return(this.GetContourGradient(obj, gp) < 0);
});
layer = new ContourOptimizer().RemoveNonCompactPixels(layer, 3);
//layer=new ConcaveObjectSeparation().Execute(layer, 0.33, true);
double[] hBackground = this.GetBackgroundHistogram(layer, gpH);
double[] hForeground = this.GetForegroundHistogram(layer, gpH);
bool isFirst = true;
ObjectLayer firstStep = null;
while (true)
{
bool removed = false;
layer = layer.CreateAbove(obj =>
{
int[] hHistogram = this.GetHistogram(obj, gpH);
double hRatioForeground = this.GetRatioForeground(hHistogram, hForeground, hBackground);
if (hRatioForeground > 0.5)
{
return(true);
}
for (int i = 0; i < 256; i++)
{
int val = hHistogram[i];
hForeground[i] -= val;
hBackground[i] += val;
}
removed = true;
return(false);
});
if (isFirst)
{
firstStep = layer;
isFirst = false;
}
if (!removed)
{
break;
}
}
if (layer.Objects.Count == 0)
{
layer = firstStep;
}
double minArea = Math.Max(0.1 * targetArea, MIN_AREA);
layer = layer.CreateAbove(obj =>
{
float area = ContourProperties.FromContour(obj.Contour).Area;
return(area >= minArea);
});
layer = this.RefillContours(layer);
return(layer);
}