From dc0a21ffc7462f1cbc488c505ac0a09a8ff445b5 Mon Sep 17 00:00:00 2001
From: WenmuZhou <zjwenmu@gmail.com>
Date: Tue, 2 Feb 2021 15:45:57 +0800
Subject: [PATCH] fix divide zero error

---
 ppocr/metrics/rec_metric.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ppocr/metrics/rec_metric.py b/ppocr/metrics/rec_metric.py
index a86fc838..cfd0805e 100644
--- a/ppocr/metrics/rec_metric.py
+++ b/ppocr/metrics/rec_metric.py
@@ -29,7 +29,7 @@ class RecMetric(object):
             pred = pred.replace(" ", "")
             target = target.replace(" ", "")
             norm_edit_dis += Levenshtein.distance(pred, target) / max(
-                len(pred), len(target))
+                len(pred), len(target), 1)
             if pred == target:
                 correct_num += 1
             all_num += 1
-- 
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