From f2fbfd7a10468946199c43c4e446d03505c23ac0 Mon Sep 17 00:00:00 2001
From: cDc <cdc.seacave@gmail.com>
Date: Tue, 17 Apr 2018 13:30:56 +0300
Subject: [PATCH] fix bug in Matx::inv()

---
 modules/core/include/opencv2/core/operations.hpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/modules/core/include/opencv2/core/operations.hpp b/modules/core/include/opencv2/core/operations.hpp
index e5d1a7e80a..75864ea822 100644
--- a/modules/core/include/opencv2/core/operations.hpp
+++ b/modules/core/include/opencv2/core/operations.hpp
@@ -194,8 +194,8 @@ Matx<_Tp, n, m> Matx<_Tp, m, n>::inv(int method, bool *p_is_ok /*= NULL*/) const
 {
     Matx<_Tp, n, m> b;
     bool ok;
-    if( method == DECOMP_LU || method == DECOMP_CHOLESKY )
-        ok = cv::internal::Matx_FastInvOp<_Tp, m>()(*this, b, method);
+    if( m == n && (method == DECOMP_LU || method == DECOMP_CHOLESKY) )
+        ok = cv::internal::Matx_FastInvOp<_Tp, m>()(*reinterpret_cast<const Matx<_Tp, m, m>*>(this), reinterpret_cast<Matx<_Tp, m, m>&>(b), method);
     else
     {
         Mat A(*this, false), B(b, false);
-- 
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