Make aruco dependency optional for interactive calibration app

apps/interactive-calibration/frameProcessor.hpp

@@ -6,8 +6,10 @@
 #define FRAME_PROCESSOR_HPP
 
 #include <opencv2/core.hpp>
-#include <opencv2/aruco/charuco.hpp>
 #include <opencv2/calib3d.hpp>
+#ifdef HAVE_OPENCV_ARUCO
+#include <opencv2/aruco/charuco.hpp>
+#endif
 
 #include "calibCommon.hpp"
 #include "calibController.hpp"
@@ -37,8 +39,10 @@ protected:
     cv::Mat mCurrentCharucoIds;
 
     cv::Ptr<cv::SimpleBlobDetector> mBlobDetectorPtr;
+#ifdef HAVE_OPENCV_ARUCO
     cv::Ptr<cv::aruco::Dictionary> mArucoDictionary;
     cv::Ptr<cv::aruco::CharucoBoard> mCharucoBoard;
+#endif
 
     int mNeededFramesNum;
     unsigned mDelayBetweenCaptures;