From 8a5b6ced1a7960d70addf4c6aa0d75cc4ac7a52e Mon Sep 17 00:00:00 2001
From: Vadim Pisarevsky <no@email>
Date: Tue, 15 May 2012 14:25:07 +0000
Subject: [PATCH] fixed background update in GMM2 algorithm (ticket #1931)

---
 modules/video/src/bgfg_gaussmix2.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/video/src/bgfg_gaussmix2.cpp b/modules/video/src/bgfg_gaussmix2.cpp
index 5be317e7b..3c39b33d1 100644
--- a/modules/video/src/bgfg_gaussmix2.cpp
+++ b/modules/video/src/bgfg_gaussmix2.cpp
@@ -571,7 +571,7 @@ void BackgroundSubtractorMOG2::operator()(InputArray _image, OutputArray _fgmask
                                  bgmodelUsedModes.data, nmixtures, (float)learningRate,
                                  (float)varThreshold,
                                  backgroundRatio, varThresholdGen,
-                                 fVarInit, fVarMin, fVarMax, fCT, fTau,
+                                 fVarInit, fVarMin, fVarMax, -learningRate*fCT, fTau,
                                  bShadowDetection, nShadowDetection));
     }
 }