diff --git a/src/algorithms/ttoolbox.cpp b/src/algorithms/ttoolbox.cpp
index e5005a3d1267ce358322aa4a95850bba375409f5..2fc4ab50863c70d3709b00c87311fe8376191b95 100644
--- a/src/algorithms/ttoolbox.cpp
+++ b/src/algorithms/ttoolbox.cpp
@@ -57,6 +57,7 @@ std::vector<std::vector<cv::Point>> TToolBox::applyCannyEdgeAndCalcCountours(cv:
         cv::drawContours( imgContour, contours, i, color, 1, cv::LINE_AA, hierarchy, 0, cv::Point() );
     }
 
+
     cv::String outpath=  "/homes/tb55xemi/work/dev/bgslibrary-bgslib_qtgui_2.0.0/build/test0815/results";
     std::ostringstream convert;
     convert << outpath << "test_countour_canny_edge.jpg";
diff --git a/src/algorithms/ttoolbox.h b/src/algorithms/ttoolbox.h
index ee2ca9b194ff94b72a7c73bf7382b640c556bb8d..656a048324eea785ee4e16a6dad0efdfc23d4aa3 100644
--- a/src/algorithms/ttoolbox.h
+++ b/src/algorithms/ttoolbox.h
@@ -42,6 +42,7 @@ public:
     static std::vector<std::vector<cv::Point>> applyCannyEdgeAndCalcCountours(cv::Mat imgSource, double threshholdMin, double threshholdMax, int apertureSize);
 
     //! will test if file is not corrupted
+    //! Requires: 'identify' cmd from ImageMagick
     //! @return 1 if corrupted
     //! @return 0 if not
     static int checkFileCorrupted(std::string filename);