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 1/2] 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 );

From 77e51ff9c4a49306aa741a79bef153ca804f6ae3 Mon Sep 17 00:00:00 2001
From: gpsinghsandhu <gpsinghsandhu@yahoo.com>
Date: Sun, 31 Mar 2013 16:13:40 +0530
Subject: [PATCH 2/2] contours with zero area rejected

reject contours with zero area by using the "continue" statement to be in sync with the condition checking style used in the whole file
---
 modules/features2d/src/blobdetector.cpp | 15 ++++-----------
 1 file changed, 4 insertions(+), 11 deletions(-)

diff --git a/modules/features2d/src/blobdetector.cpp b/modules/features2d/src/blobdetector.cpp
index 7b633eef48..785651fe38 100644
--- a/modules/features2d/src/blobdetector.cpp
+++ b/modules/features2d/src/blobdetector.cpp
@@ -239,13 +239,6 @@ void SimpleBlobDetector::findBlobs(const cv::Mat &image, const cv::Mat &binaryIm
             if (ratio < params.minConvexity || ratio >= params.maxConvexity)
                 continue;
         }
-
-        bool blob_valid = true;
-
-        if (moms.m00 == 0.0)
-        {
-            blob_valid = false;
-        }
         
         center.location = Point2d(moms.m10 / moms.m00, moms.m01 / moms.m00);
 
@@ -267,10 +260,10 @@ void SimpleBlobDetector::findBlobs(const cv::Mat &image, const cv::Mat &binaryIm
             center.radius = (dists[(dists.size() - 1) / 2] + dists[dists.size() / 2]) / 2.;
         }
 
-        if (blob_valid)
-        {
-            centers.push_back(center);
-        }
+        if(moms.m00 == 0.0)
+            continue;
+        centers.push_back(center);
+
 
 #ifdef DEBUG_BLOB_DETECTOR
         //    circle( keypointsImage, center.location, 1, Scalar(0,0,255), 1 );