From 8bbbd9341053ac1409dba633bb79768b1d37e6f3 Mon Sep 17 00:00:00 2001
From: Maria Dimashova <no@email>
Date: Wed, 4 May 2011 11:12:17 +0000
Subject: [PATCH] fixed #1025

---
 modules/traincascade/cascadeclassifier.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/modules/traincascade/cascadeclassifier.cpp b/modules/traincascade/cascadeclassifier.cpp
index a06223824..ee5e8a208 100644
--- a/modules/traincascade/cascadeclassifier.cpp
+++ b/modules/traincascade/cascadeclassifier.cpp
@@ -264,9 +264,11 @@ bool CvCascadeClassifier::updateTrainingSet( double& acceptanceRatio)
         return false;
     cout << "POS count : consumed   " << posCount << " : " << (int)posConsumed << endl;
 
-    int negCount = fillPassedSamples( numPos, numNeg, false, negConsumed );
+    int proNumNeg = cvRound( (float)(numNeg * posCount) / numPos ); // apply only a fraction of negative samples.
+    int negCount = fillPassedSamples( posCount, proNumNeg, false, negConsumed );
     if ( !negCount )
         return false;
+
     curNumSamples = posCount + negCount;
     acceptanceRatio = negConsumed == 0 ? 0 : ( (double)negCount/(double)(int64)negConsumed );
     cout << "NEG count : acceptanceRatio    " << negCount << " : " << acceptanceRatio << endl;