mirror of
https://github.com/moses-smt/mosesdecoder.git
synced 2024-12-27 05:55:02 +03:00
71 lines
1.8 KiB
C++
71 lines
1.8 KiB
C++
#ifndef MERT_BLEU_SCORER_H_
|
|
#define MERT_BLEU_SCORER_H_
|
|
|
|
#include <ostream>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "Types.h"
|
|
#include "ScoreData.h"
|
|
#include "Scorer.h"
|
|
#include "ScopedVector.h"
|
|
|
|
using namespace std;
|
|
|
|
/**
|
|
* Bleu scoring
|
|
*/
|
|
class BleuScorer: public StatisticsBasedScorer
|
|
{
|
|
public:
|
|
explicit BleuScorer(const string& config = "");
|
|
~BleuScorer();
|
|
|
|
virtual void setReferenceFiles(const vector<string>& referenceFiles);
|
|
virtual void prepareStats(size_t sid, const string& text, ScoreStats& entry);
|
|
virtual float calculateScore(const vector<int>& comps) const;
|
|
virtual size_t NumberOfScores() const { return 2 * kLENGTH + 1; }
|
|
|
|
private:
|
|
enum ReferenceLengthType {
|
|
AVERAGE,
|
|
SHORTEST,
|
|
CLOSEST
|
|
};
|
|
|
|
/**
|
|
* A NgramCounts is a key-value store.
|
|
* Clients don't have to worry about the actual implementation
|
|
* since this type is used in internal only.
|
|
*/
|
|
class NgramCounts;
|
|
|
|
/**
|
|
* Count the ngrams of each type, up to the given length in the input line.
|
|
*/
|
|
size_t countNgrams(const string& line, NgramCounts& counts, unsigned int n);
|
|
|
|
void dump_counts(std::ostream* os, const NgramCounts& counts) const;
|
|
|
|
// For calculating effective reference length.
|
|
void CalcAverage(size_t sentence_id,
|
|
vector<ScoreStatsType>& stats) const;
|
|
void CalcClosest(size_t sentence_id, size_t length,
|
|
vector<ScoreStatsType>& stats) const;
|
|
void CalcShortest(size_t sentence_id,
|
|
vector<ScoreStatsType>& stats) const;
|
|
|
|
const int kLENGTH;
|
|
ReferenceLengthType m_ref_length_type;
|
|
|
|
// data extracted from reference files
|
|
ScopedVector<NgramCounts> m_ref_counts;
|
|
vector<vector<size_t> > m_ref_lengths;
|
|
|
|
// no copying allowed
|
|
BleuScorer(const BleuScorer&);
|
|
BleuScorer& operator=(const BleuScorer&);
|
|
};
|
|
|
|
#endif // MERT_BLEU_SCORER_H_
|