From 61b2556694883e94a91e4f91e1aa76a23227efd0 Mon Sep 17 00:00:00 2001
From: WZMIAOMIAO <605169423@qq.com>
Date: Thu, 30 Dec 2021 15:27:52 +0800
Subject: [PATCH] fix a bug

---
 ppocr/data/imaug/make_border_map.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/ppocr/data/imaug/make_border_map.py b/ppocr/data/imaug/make_border_map.py
index abab38368d..39650c629d 100644
--- a/ppocr/data/imaug/make_border_map.py
+++ b/ppocr/data/imaug/make_border_map.py
@@ -78,7 +78,10 @@ def draw_border_map(self, polygon, canvas, mask):
         padding = pyclipper.PyclipperOffset()
         padding.AddPath(subject, pyclipper.JT_ROUND, pyclipper.ET_CLOSEDPOLYGON)
 
-        padded_polygon = np.array(padding.Execute(distance)[0])
+        result = padding.Execute(distance)
+        if len(result) == 0:
+            return
+        padded_polygon = np.array(result[0])
         cv2.fillPoly(mask, [padded_polygon.astype(np.int32)], 1.0)
 
         xmin = padded_polygon[:, 0].min()