From 1566694145ab94d4cb57b7e7b03f518cb6abd6a7 Mon Sep 17 00:00:00 2001
From: WenmuZhou <572459439@qq.com>
Date: Fri, 26 Aug 2022 07:29:13 +0000
Subject: [PATCH] Fix boundary problems

---
 deploy/cpp_infer/src/utility.cpp | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/deploy/cpp_infer/src/utility.cpp b/deploy/cpp_infer/src/utility.cpp
index 4bfc1d09..251184b9 100644
--- a/deploy/cpp_infer/src/utility.cpp
+++ b/deploy/cpp_infer/src/utility.cpp
@@ -268,11 +268,12 @@ cv::Mat Utility::crop_image(cv::Mat &img, std::vector<int> &area) {
 
 void Utility::sorted_boxes(std::vector<OCRPredictResult> &ocr_result) {
   std::sort(ocr_result.begin(), ocr_result.end(), Utility::comparison_box);
-
-  for (int i = 0; i < ocr_result.size() - 1; i++) {
-    if (abs(ocr_result[i + 1].box[0][1] - ocr_result[i].box[0][1]) < 10 &&
-        (ocr_result[i + 1].box[0][0] < ocr_result[i].box[0][0])) {
-      std::swap(ocr_result[i], ocr_result[i + 1]);
+  if (ocr_result.size() > 0) {
+    for (int i = 0; i < ocr_result.size() - 1; i++) {
+      if (abs(ocr_result[i + 1].box[0][1] - ocr_result[i].box[0][1]) < 10 &&
+          (ocr_result[i + 1].box[0][0] < ocr_result[i].box[0][0])) {
+        std::swap(ocr_result[i], ocr_result[i + 1]);
+      }
     }
   }
 }
-- 
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