From 1f4b8c2785cd5ffe34bf226871f41246c1ba830b Mon Sep 17 00:00:00 2001
From: Arthur Williams <30328048+DabatoIsCool@users.noreply.github.com>
Date: Wed, 27 Dec 2017 14:09:25 +0000
Subject: [PATCH] Fixed #10433

backport #10435
---
 modules/core/src/matmul.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/modules/core/src/matmul.cpp b/modules/core/src/matmul.cpp
index 4be9c4daa3..06d57685fb 100644
--- a/modules/core/src/matmul.cpp
+++ b/modules/core/src/matmul.cpp
@@ -2994,6 +2994,7 @@ PCA& PCA::computeVar(InputArray _data, InputArray __mean, int flags, double reta
     {
         CV_Assert( _mean.size() == mean_sz );
         _mean.convertTo(mean, ctype);
+        covar_flags |= CV_COVAR_USE_AVG;
     }
 
     calcCovarMatrix( data, covar, mean, covar_flags, ctype );