HI, yes, GetScore() does not include the future score, just the weighted partial score computed so far. The difference to hypo->GetPrevHypo()->GetScore() is the transition cost from the prior best hypothesis. This number should be negative, excecpt in rare cases (for instance adding a common word that the language model does not mind, but the brevity penalty rewards).
I am not sure what you are planning to do with "confidence", but bear in mind that longer phrases and phrases with less common (content) words will be more costly. -phi 2010/2/3 Jörg Tiedemann <[email protected]>: > > I have a question about scores for individual translation hypotheses. > I would like to get some kind of confidence measure for a particular > phrase translation used in a given translation hypothesis. > > Does it make sense to compute the difference between the current score > (using hypo->GetScore()) and the score at the previous step > (hypo->GetPrevHypo()->GetScore())? This ignores any future score > estimations if I understand correctly but that should be OK, shouldn't > it? (I don't want to include any other costs here because I'm only > interested in the confidence of the current hypo within the translation > candidate.) By the way, this difference can be a positive value, right? > It only depends on the weights and feature values, doesn't it? But would > it make sense to have a fixed threshold for defining some level of > confidence for this candidate? Probably not ....?! > > Thanks for any comments, > > Jörg > > *******/\/\/\/\/\/\/\/\/\/\/\****************************************** > Jörg Tiedemann [email protected] > http://stp.lingfil.uu.se/~joerg/ > Dep. of Linguistics and Philology > Uppsala University tel: +46 (0)18 - 471 1412 > Box 635, SE-751 26 Uppsala/SWEDEN fax: +46 (0)18 - 471 1094 > *********************************/\/\/\/\/\/\/\/\/\/\/\**************** > _______________________________________________ > Moses-support mailing list > [email protected] > http://mailman.mit.edu/mailman/listinfo/moses-support > _______________________________________________ Moses-support mailing list [email protected] http://mailman.mit.edu/mailman/listinfo/moses-support
