From 0d16a9befb05858d1857bb2e06912a28b1c3e805 Mon Sep 17 00:00:00 2001
From: gpsinghsandhu <gpsinghsandhu@yahoo.com>
Date: Sat, 30 Mar 2013 00:33:22 +0530
Subject: [PATCH] In response to Bug #2927

change to reject contours with moms.m00 = 0.0
---
 modules/features2d/src/blobdetector.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/modules/features2d/src/blobdetector.cpp b/modules/features2d/src/blobdetector.cpp
index 3f50f3c1af..7b633eef48 100644
--- a/modules/features2d/src/blobdetector.cpp
+++ b/modules/features2d/src/blobdetector.cpp
@@ -240,6 +240,13 @@ void SimpleBlobDetector::findBlobs(const cv::Mat &image, const cv::Mat &binaryIm
                 continue;
         }
 
+        bool blob_valid = true;
+
+        if (moms.m00 == 0.0)
+        {
+            blob_valid = false;
+        }
+        
         center.location = Point2d(moms.m10 / moms.m00, moms.m01 / moms.m00);
 
         if (params.filterByColor)
@@ -260,7 +267,10 @@ void SimpleBlobDetector::findBlobs(const cv::Mat &image, const cv::Mat &binaryIm
             center.radius = (dists[(dists.size() - 1) / 2] + dists[dists.size() / 2]) / 2.;
         }
 
-        centers.push_back(center);
+        if (blob_valid)
+        {
+            centers.push_back(center);
+        }
 
 #ifdef DEBUG_BLOB_DETECTOR
         //    circle( keypointsImage, center.location, 1, Scalar(0,0,255), 1 );