From f3cbb0f941977e7f7f4a121ec29fa5bfebcd8497 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Fri, 25 May 2018 15:35:36 +0300
Subject: [PATCH] calib3d: chess board - perform full range (with 0) histogram
 smooth

---
 modules/calib3d/src/calibinit.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/calib3d/src/calibinit.cpp b/modules/calib3d/src/calibinit.cpp
index 283a9217a9..597269138f 100644
--- a/modules/calib3d/src/calibinit.cpp
+++ b/modules/calib3d/src/calibinit.cpp
@@ -252,7 +252,7 @@ static int icvSmoothHistogram( const std::vector<int>& piHist, std::vector<int>&
         for ( int ii=-iWidth; ii<=iWidth; ii++)
         {
             iIdx = i+ii;
-            if (iIdx > 0 && iIdx < 256)
+            if (iIdx >= 0 && iIdx < 256)
             {
                 iSmooth += piHist[iIdx];
             }