From 5e7035b39b3d39d49c7c138ea2c89caeacac26e0 Mon Sep 17 00:00:00 2001
From: Vitaly Tuzov <terfendail@mediana.jetos.com>
Date: Wed, 7 Feb 2018 18:40:52 +0300
Subject: [PATCH] Fixed estimation Hessian matrix eigenvalue in
 getRidgeFilteredImage()

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

diff --git a/modules/ximgproc/src/ridgedetectionfilter.cpp b/modules/ximgproc/src/ridgedetectionfilter.cpp
index dd4a383df..9ae24fd41 100644
--- a/modules/ximgproc/src/ridgedetectionfilter.cpp
+++ b/modules/ximgproc/src/ridgedetectionfilter.cpp
@@ -57,7 +57,7 @@ void RidgeDetectionFilterImpl::getRidgeFilteredImage(InputArray _img, OutputArra
     multiply(sbxx, sbyy, sbxxyy);
 
     Mat rootex;
-    rootex = (sb2xx +  (sb2xy + sb2xy + sb2xy + sb2xy)  - (sbxxyy + sbxxyy) + sb2xy );
+    rootex = (sb2xx +  (sb2xy + sb2xy + sb2xy + sb2xy)  - (sbxxyy + sbxxyy) + sb2yy );
     Mat root;
     sqrt(rootex, root);
     Mat ridgexp;