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#!/usr/bin/env python
#
# File Name : bleu.py
#
# Description : Wrapper for BLEU scorer.
#
# Creation Date : 06-01-2015
# Last Modified : Thu 19 Mar 2015 09:13:28 PM PDT
# Authors : Hao Fang <[email protected]> and Tsung-Yi Lin <[email protected]>
# Last modified : Wed 22 May 2019 08:10:00 PM EDT
# By Sabarish Sivanath
# To support Python 3
from .bleu_scorer import BleuScorer
class Bleu:
def __init__(self, n=4):
# default compute Blue score up to 4
self._n = n
self._hypo_for_image = {}
self.ref_for_image = {}
def compute_score(self, gts, res, score_option = 'closest', verbose = 1):
'''
Inputs:
gts - ground truths
res - predictions
score_option - {shortest, closest, average}
verbose - 1 or 0
Outputs:
Blue scores
'''
assert(gts.keys() == res.keys())
imgIds = gts.keys()
bleu_scorer = BleuScorer(n=self._n)
for id in imgIds:
hypo = res[id]
ref = gts[id]
# Sanity check.
assert(type(hypo) is list)
assert(len(hypo) == 1)
assert(type(ref) is list)
#assert(len(ref) >= 1)
bleu_scorer += (hypo[0], ref)
score, scores = bleu_scorer.compute_score(option = score_option, verbose =verbose)
# return (bleu, bleu_info)
return score, scores
def method(self):
return "Bleu"
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