From 55a59e2a102b22f5014360423bc05aea3ed790b0 Mon Sep 17 00:00:00 2001
From: matlabbe <matlabbe@620bd6b2-0a58-f614-fd9a-1bd335dccda9>
Date: Sun, 24 Aug 2014 13:55:19 +0000
Subject: [PATCH] Fixed issue 24 (instead of crashing, an error message is
 shown in the console and no features are extracted)

git-svn-id: http://find-object.googlecode.com/svn/trunk/find_object@387 620bd6b2-0a58-f614-fd9a-1bd335dccda9
---
 src/FindObject.cpp | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/FindObject.cpp b/src/FindObject.cpp
index 74d42c37..13758908 100644
--- a/src/FindObject.cpp
+++ b/src/FindObject.cpp
@@ -394,7 +394,17 @@ protected:
 				}
 				timeDetection_+=timeStep.restart();
 
-				extractor_->compute(image_, keypoints_, descriptors_);
+				try
+				{
+					extractor_->compute(image_, keypoints_, descriptors_);
+				}
+				catch(cv::Exception & e)
+				{
+					UERROR("Descriptor exception: %s. Maybe some keypoints are invalid "
+							"for the selected descriptor extractor.", e.what());
+					descriptors_ = cv::Mat();
+					keypoints_.clear();
+				}
 				timeExtraction_+=timeStep.restart();
 
 				if((int)keypoints_.size() != descriptors_.rows)