From e14b2ba43cf2e3cb7f454bd3d9145749281284f2 Mon Sep 17 00:00:00 2001
From: berak <px1704@web.de>
Date: Sat, 7 Jul 2018 16:56:40 +0200
Subject: [PATCH] objdetect: validate input in qrcode

---
 modules/objdetect/src/qrcode.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/modules/objdetect/src/qrcode.cpp b/modules/objdetect/src/qrcode.cpp
index f7c40a744f..e3c8d559ae 100644
--- a/modules/objdetect/src/qrcode.cpp
+++ b/modules/objdetect/src/qrcode.cpp
@@ -71,8 +71,11 @@ bool QRDecode::localization()
     Point begin, end;
 
     std::vector<Vec3d> list_lines_x = searchVerticalLines();
+    if (list_lines_x.empty()) return false;
     std::vector<Vec3d> list_lines_y = separateHorizontalLines(list_lines_x);
+    if (list_lines_y.empty()) return false;
     std::vector<Vec3d> result_point = pointClustering(list_lines_y);
+    if (result_point.empty()) return false;
     for (int i = 0; i < 3; i++)
     {
         localization_points.push_back(
-- 
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