cvmat const reference in capture constructor

include/vision/capture/capture_image.h

@@ -57,7 +57,7 @@ class CaptureImage : public CaptureBase
         cv::Mat                         global_descriptor_;
 
     public:
-        CaptureImage(const TimeStamp& _ts, SensorCameraPtr _camera_ptr, cv::Mat _data_cv);
+        CaptureImage(const TimeStamp& _ts, SensorCameraPtr _camera_ptr, const cv::Mat& _data_cv);
         ~CaptureImage() override;
 
         const cv::Mat& getImage() const;

src/capture/capture_image.cpp

@@ -23,7 +23,7 @@
 
 namespace wolf {
 
-CaptureImage::CaptureImage(const TimeStamp& _ts, SensorCameraPtr _camera_ptr, cv::Mat _data_cv) :
+CaptureImage::CaptureImage(const TimeStamp& _ts, SensorCameraPtr _camera_ptr, const cv::Mat& _data_cv) :
     CaptureBase("CaptureImage", _ts, _camera_ptr),
     frame_(_data_cv),
     grid_features_(nullptr),