public double GetAlignmentProbability(int sourceLen, int prevSourceIndex, int sourceIndex, int targetLen,
int prevTargetIndex, int targetIndex)
{
double alignProb = _directWordAlignmentModel.GetAlignmentProbability(sourceLen, prevSourceIndex,
sourceIndex, targetLen, prevTargetIndex, targetIndex);
double invAlignProb = _inverseWordAlignmentModel.GetAlignmentProbability(targetLen, prevTargetIndex,
targetIndex, sourceLen, prevSourceIndex, sourceIndex);
return(Math.Max(alignProb, invAlignProb));
}
public IEnumerable <AlignedWordPair> GetAlignedWordPairs(IWordAlignmentModel model,
IReadOnlyList <string> sourceSegment, IReadOnlyList <string> targetSegment)
{
foreach (AlignedWordPair wordPair in GetAlignedWordPairs(out IReadOnlyList <int> sourceIndices,
out IReadOnlyList <int> targetIndices))
{
string sourceWord = sourceSegment[wordPair.SourceIndex];
string targetWord = targetSegment[wordPair.TargetIndex];
wordPair.TranslationProbability = model.GetTranslationProbability(sourceWord, targetWord);
int prevSourceIndex = wordPair.TargetIndex == 0 ? -1 : sourceIndices[wordPair.TargetIndex - 1];
int prevTargetIndex = wordPair.SourceIndex == 0 ? -1 : targetIndices[wordPair.SourceIndex - 1];
wordPair.AlignmentProbability = model.GetAlignmentProbability(sourceSegment.Count, prevSourceIndex,
wordPair.SourceIndex, targetSegment.Count, prevTargetIndex, wordPair.TargetIndex);
yield return(wordPair);
}
}