/// <summary>
/// Loads the priors of BCC and CBCC.
/// </summary>
/// <returns>A BCC posterior instance with the loaded priors.</returns>
BCC.Posteriors ToPriors()
{
int numClasses = Mapping.LabelCount;
int numTasks = Mapping.TaskCount;
int numWorkers = Mapping.WorkerCount;
CommunityModel.Posteriors cbccPriors = new CommunityModel.Posteriors();
BCC.Posteriors priors = IsCommunityModel ? cbccPriors : new BCC.Posteriors();
/// Loads the prior of the background probabilities of the tasks
priors.BackgroundLabelProb = BackgroundLabelProb;
/// Loads the prior of the confusion matrix of each worker
priors.WorkerConfusionMatrix = Util.ArrayInit(numWorkers,
w =>
{
string wid = Mapping.WorkerIndexToId[w];
if (WorkerConfusionMatrix.ContainsKey(wid))
{
return(Util.ArrayInit(numClasses, lab => WorkerConfusionMatrix[wid][lab]));
}
else
{
return(Util.ArrayInit(numClasses, lab => Dirichlet.Uniform(numClasses)));
}
});
/// Loads the true label constraint of each task
priors.TrueLabelConstraint = Util.ArrayInit(numTasks,
t =>
{
string tid = Mapping.TaskIndexToId[t];
if (TrueLabelConstraint.ContainsKey(tid))
{
return(TrueLabelConstraint[Mapping.TaskIndexToId[t]]);
}
else
{
return(Discrete.Uniform(numClasses));
}
});
/// Loads the priors of the parameters of CBCC
if (IsCommunityModel)
{
cbccPriors.CommunityConfusionMatrix = CommunityConfusionMatrix;
cbccPriors.WorkerScoreMatrixConstraint = Util.ArrayInit(numWorkers,
w =>
{
string wid = Mapping.WorkerIndexToId[w];
if (WorkerScoreMatrixConstraint.ContainsKey(wid))
{
return(Util.ArrayInit(numClasses, lab => WorkerScoreMatrixConstraint[wid][lab]));
}
else
{
return(Util.ArrayInit(numClasses, lab => VectorGaussian.Uniform(numClasses)));
}
});
cbccPriors.CommunityProb = CommunityProb;
cbccPriors.CommunityScoreMatrix = CommunityScoreMatrix;
cbccPriors.WorkerCommunityConstraint = Util.ArrayInit(numWorkers,
w =>
{
string wid = Mapping.WorkerIndexToId[w];
if (CommunityConstraint.ContainsKey(wid))
{
return(CommunityConstraint[wid]);
}
else
{
return(Discrete.Uniform(CommunityCount));
}
});
}
priors.Evidence = ModelEvidence;
return(priors);
}
BCCPosteriors ToPriors()
{
int numClasses = Mapping.LabelCount;
int numTasks = Mapping.TaskCount;
int numWorkers = Mapping.WorkerCount;
CBCCPosteriors cbccPriors = new CBCCPosteriors();
BCCPosteriors priors = IsCommunityModel ? cbccPriors : new BCCPosteriors();
priors.BackgroundLabelProb = BackgroundLabelProb;
priors.WorkerConfusionMatrix = Util.ArrayInit(numWorkers,
w =>
{
string wid = Mapping.WorkerIndexToId[w];
if (WorkerConfusionMatrix.ContainsKey(wid))
{
return(Util.ArrayInit(numClasses, c => WorkerConfusionMatrix[wid][c]));
}
else
{
return(Util.ArrayInit(numClasses, c => Dirichlet.Uniform(numClasses)));
}
});
priors.TrueLabelConstraint = Util.ArrayInit(numTasks,
t =>
{
string tid = Mapping.TaskIndexToId[t];
if (TrueLabelConstraint.ContainsKey(tid))
{
return(TrueLabelConstraint[Mapping.TaskIndexToId[t]]);
}
else
{
return(Discrete.Uniform(numClasses));
}
});
if (IsCommunityModel)
{
cbccPriors.CommunityConfusionMatrix = CommunityConfusionMatrix;
cbccPriors.WorkerScoreMatrixConstraint = Util.ArrayInit(numWorkers,
w =>
{
string wid = Mapping.WorkerIndexToId[w];
if (WorkerScoreMatrixConstraint.ContainsKey(wid))
{
return(Util.ArrayInit(numClasses, c => WorkerScoreMatrixConstraint[wid][c]));
}
else
{
return(Util.ArrayInit(numClasses, c => VectorGaussian.Uniform(numClasses)));
}
});
cbccPriors.CommunityProb = CommunityProb;
cbccPriors.CommunityScoreMatrix = CommunityScoreMatrix;
cbccPriors.WorkerCommunityConstraint = Util.ArrayInit(numWorkers,
w =>
{
string wid = Mapping.WorkerIndexToId[w];
if (CommunityConstraint.ContainsKey(wid))
{
return(CommunityConstraint[wid]);
}
else
{
return(Discrete.Uniform(CommunityCount));
}
});
}
priors.Evidence = ModelEvidence;
return(priors);
}