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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| import os | ||
| import numpy as np | ||
| import sys | ||
|
|
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| 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 | ||
|
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| 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') | ||
|
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| 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) | ||
|
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||
| 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') | ||
|
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|
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| 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) | ||
|
|
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| cost_matrix = np.zeros((len_hyp + 1, len_ref + 1), dtype=np.int16) | ||
|
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| ops_matrix = np.zeros((len_hyp + 1, len_ref + 1), dtype=np.int8) | ||
|
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||
| 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 | ||
|
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| compare_val = [substitution, insertion, deletion] | ||
|
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| 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 | ||
|
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| match_idx.reverse() | ||
| wrong_cnt = cost_matrix[len_hyp][len_ref] | ||
| rst['wrong'] = wrong_cnt | ||
|
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| return rst | ||
|
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| 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'])) | ||
|
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| if __name__ == '__main__': | ||
| if len(sys.argv) != 4: | ||
| print("usage : python compute-wer.py test.ref test.hyp test.wer") | ||
| sys.exit(0) | ||
|
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||
| 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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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -9,3 +9,6 @@ python funasr/bin/inference.py \ | |
| +output_dir="./outputs/debug" \ | ||
| +device="cpu" \ | ||
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