public bool Matches(BlobAnalysisResult result)
{
if (MassMin.HasValue && result.Mass < MassMin.Value)
{
return(false);
}
if (MassMax.HasValue && result.Mass > MassMax.Value)
{
return(false);
}
if (MeanRadiusMin.HasValue && result.MeanRadius < MeanRadiusMin.Value)
{
return(false);
}
if (MeanRadiusMax.HasValue && result.MeanRadius > MeanRadiusMax.Value)
{
return(false);
}
if (MedianRadiusMin.HasValue && result.MedianRadius < MedianRadiusMin.Value)
{
return(false);
}
if (MedianRadiusMax.HasValue && result.MedianRadius > MedianRadiusMax.Value)
{
return(false);
}
return(true);
}
public static BlobAnalysisResult Analyze(this BlobContainer blob,
int?frameXOffset = null, int?frameYOffset = null,
int?frameXLength = null, int?frameYLength = null)
{
var mass = 0D;
var xAggregate = 0D;
var yAggregate = 0D;
foreach (var c in blob.Points)
{
mass += c.Color.TotalBrightness();
xAggregate += c.Location.X;
yAggregate += c.Location.Y;
}
if (mass == 0)
{
return(null);
}
var response = new BlobAnalysisResult
{
Mass = mass,
CentroidX = xAggregate / mass,
CentroidY = yAggregate / mass,
OriginalBlob = blob
};
var radiusComponents = new List <double>();
var paddingComponents = new List <double>();
var xOffset = frameXOffset ?? blob.Points.Min(a => a.Location.X);
var yOffset = frameYOffset ?? blob.Points.Min(a => a.Location.Y);
var xLength = frameXLength ?? (blob.Points.Max(a => a.Location.X) - xOffset);
var yLength = frameYLength ?? (blob.Points.Max(a => a.Location.Y) - yOffset);
foreach (var c in blob.Points)
{
var radius = Math.Sqrt(Math.Pow(c.Location.X - response.CentroidX, 2) + Math.Pow(c.Location.Y - response.CentroidY, 2));
var weighted = radius * c.Color.TotalBrightness();
radiusComponents.Add(weighted);
paddingComponents.Add(Util.AbsMin(c.Location.X - xOffset, c.Location.X - (xOffset + xLength),
c.Location.Y - yOffset, c.Location.Y - (yOffset + yLength)));
}
response.MeanRadius = radiusComponents.Average();
response.MedianRadius = radiusComponents.Median();
response.MeanPadding = paddingComponents.Average();
response.MedianPadding = paddingComponents.Median();
return(response);
}