BLEU

Calculate the Evaluation of Machine Translate--BLEU，the language includes Chinese and English

BLEU -- BiLingual Evaluation Understudy, is a method to evaluate result of Machine Translate.

Calculate

1. calculate the count_clip(n-gram) Where count(n-gram) is the number of occurrences of an n-gram in the candidate translation, and MaxRefCount(n-gram) is the maximum number of occurrences of the n-gram in the reference translation. The final statistical result count_clip(n-gram) is the smaller of the two.
2. calculate the pn

3. calculate the bp

4. calculate BLEU

Usage

calculate English BLEU:

python bleu.py data/candidate_en.txt data/reference_en en

calculate Chinese BLEU:

python bleu.py data/candidate_ch.txt data/reference_ch ch

Reference

BLEU: a Method for Automatic Evaluation of Machine Translation

git:vikasnar/Bleu