From e1ba6bc138b4e73875c64f35f98f3b15a0560e92 Mon Sep 17 00:00:00 2001
From: 嘉渊 <wangjiaming.wjm@alibaba-inc.com>
Date: 星期三, 17 五月 2023 15:16:06 +0800
Subject: [PATCH] Merge branch 'dev_infer' of https://github.com/alibaba/FunASR into dev_infer
---
egs/aishell2/transformer/utils/compute_wer.py | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 157 insertions(+), 0 deletions(-)
diff --git a/egs/aishell2/transformer/utils/compute_wer.py b/egs/aishell2/transformer/utils/compute_wer.py
new file mode 100755
index 0000000..26a9f49
--- /dev/null
+++ b/egs/aishell2/transformer/utils/compute_wer.py
@@ -0,0 +1,157 @@
+import os
+import numpy as np
+import sys
+
+def compute_wer(ref_file,
+ hyp_file,
+ cer_detail_file):
+ rst = {
+ 'Wrd': 0,
+ 'Corr': 0,
+ 'Ins': 0,
+ 'Del': 0,
+ 'Sub': 0,
+ 'Snt': 0,
+ 'Err': 0.0,
+ 'S.Err': 0.0,
+ 'wrong_words': 0,
+ 'wrong_sentences': 0
+ }
+
+ hyp_dict = {}
+ ref_dict = {}
+ with open(hyp_file, 'r') as hyp_reader:
+ for line in hyp_reader:
+ key = line.strip().split()[0]
+ value = line.strip().split()[1:]
+ hyp_dict[key] = value
+ with open(ref_file, 'r') as ref_reader:
+ for line in ref_reader:
+ key = line.strip().split()[0]
+ value = line.strip().split()[1:]
+ ref_dict[key] = value
+
+ cer_detail_writer = open(cer_detail_file, 'w')
+ for hyp_key in hyp_dict:
+ if hyp_key in ref_dict:
+ out_item = compute_wer_by_line(hyp_dict[hyp_key], ref_dict[hyp_key])
+ rst['Wrd'] += out_item['nwords']
+ rst['Corr'] += out_item['cor']
+ rst['wrong_words'] += out_item['wrong']
+ rst['Ins'] += out_item['ins']
+ rst['Del'] += out_item['del']
+ rst['Sub'] += out_item['sub']
+ rst['Snt'] += 1
+ if out_item['wrong'] > 0:
+ rst['wrong_sentences'] += 1
+ cer_detail_writer.write(hyp_key + print_cer_detail(out_item) + '\n')
+ cer_detail_writer.write("ref:" + '\t' + " ".join(list(map(lambda x: x.lower(), ref_dict[hyp_key]))) + '\n')
+ cer_detail_writer.write("hyp:" + '\t' + " ".join(list(map(lambda x: x.lower(), hyp_dict[hyp_key]))) + '\n')
+
+ if rst['Wrd'] > 0:
+ rst['Err'] = round(rst['wrong_words'] * 100 / rst['Wrd'], 2)
+ if rst['Snt'] > 0:
+ rst['S.Err'] = round(rst['wrong_sentences'] * 100 / rst['Snt'], 2)
+
+ cer_detail_writer.write('\n')
+ cer_detail_writer.write("%WER " + str(rst['Err']) + " [ " + str(rst['wrong_words'])+ " / " + str(rst['Wrd']) +
+ ", " + str(rst['Ins']) + " ins, " + str(rst['Del']) + " del, " + str(rst['Sub']) + " sub ]" + '\n')
+ cer_detail_writer.write("%SER " + str(rst['S.Err']) + " [ " + str(rst['wrong_sentences']) + " / " + str(rst['Snt']) + " ]" + '\n')
+ cer_detail_writer.write("Scored " + str(len(hyp_dict)) + " sentences, " + str(len(hyp_dict) - rst['Snt']) + " not present in hyp." + '\n')
+
+
+def compute_wer_by_line(hyp,
+ ref):
+ hyp = list(map(lambda x: x.lower(), hyp))
+ ref = list(map(lambda x: x.lower(), ref))
+
+ len_hyp = len(hyp)
+ len_ref = len(ref)
+
+ cost_matrix = np.zeros((len_hyp + 1, len_ref + 1), dtype=np.int16)
+
+ ops_matrix = np.zeros((len_hyp + 1, len_ref + 1), dtype=np.int8)
+
+ for i in range(len_hyp + 1):
+ cost_matrix[i][0] = i
+ for j in range(len_ref + 1):
+ cost_matrix[0][j] = j
+
+ for i in range(1, len_hyp + 1):
+ for j in range(1, len_ref + 1):
+ if hyp[i - 1] == ref[j - 1]:
+ cost_matrix[i][j] = cost_matrix[i - 1][j - 1]
+ else:
+ substitution = cost_matrix[i - 1][j - 1] + 1
+ insertion = cost_matrix[i - 1][j] + 1
+ deletion = cost_matrix[i][j - 1] + 1
+
+ compare_val = [substitution, insertion, deletion]
+
+ min_val = min(compare_val)
+ operation_idx = compare_val.index(min_val) + 1
+ cost_matrix[i][j] = min_val
+ ops_matrix[i][j] = operation_idx
+
+ match_idx = []
+ i = len_hyp
+ j = len_ref
+ rst = {
+ 'nwords': len_ref,
+ 'cor': 0,
+ 'wrong': 0,
+ 'ins': 0,
+ 'del': 0,
+ 'sub': 0
+ }
+ while i >= 0 or j >= 0:
+ i_idx = max(0, i)
+ j_idx = max(0, j)
+
+ if ops_matrix[i_idx][j_idx] == 0: # correct
+ if i - 1 >= 0 and j - 1 >= 0:
+ match_idx.append((j - 1, i - 1))
+ rst['cor'] += 1
+
+ i -= 1
+ j -= 1
+
+ elif ops_matrix[i_idx][j_idx] == 2: # insert
+ i -= 1
+ rst['ins'] += 1
+
+ elif ops_matrix[i_idx][j_idx] == 3: # delete
+ j -= 1
+ rst['del'] += 1
+
+ elif ops_matrix[i_idx][j_idx] == 1: # substitute
+ i -= 1
+ j -= 1
+ rst['sub'] += 1
+
+ if i < 0 and j >= 0:
+ rst['del'] += 1
+ elif j < 0 and i >= 0:
+ rst['ins'] += 1
+
+ match_idx.reverse()
+ wrong_cnt = cost_matrix[len_hyp][len_ref]
+ rst['wrong'] = wrong_cnt
+
+ return rst
+
+def print_cer_detail(rst):
+ return ("(" + "nwords=" + str(rst['nwords']) + ",cor=" + str(rst['cor'])
+ + ",ins=" + str(rst['ins']) + ",del=" + str(rst['del']) + ",sub="
+ + str(rst['sub']) + ") corr:" + '{:.2%}'.format(rst['cor']/rst['nwords'])
+ + ",cer:" + '{:.2%}'.format(rst['wrong']/rst['nwords']))
+
+if __name__ == '__main__':
+ if len(sys.argv) != 4:
+ print("usage : python compute-wer.py test.ref test.hyp test.wer")
+ sys.exit(0)
+
+ ref_file = sys.argv[1]
+ hyp_file = sys.argv[2]
+ cer_detail_file = sys.argv[3]
+ compute_wer(ref_file, hyp_file, cer_detail_file)
--
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