Extract imgcodecs module from highgui

samples/cpp/tutorial_code/calib3d/camera_calibration/camera_calibration.cpp

@@ -7,6 +7,7 @@
 #include <opencv2/core/utility.hpp>
 #include <opencv2/imgproc.hpp>
 #include <opencv2/calib3d.hpp>
+#include "opencv2/imgcodecs.hpp"
 #include <opencv2/highgui.hpp>
 
 #ifndef _CRT_SECURE_NO_WARNINGS

samples/cpp/tutorial_code/calib3d/stereoBM/SBM_Sample.cpp

@@ -8,6 +8,7 @@
 #include <iostream>
 #include "opencv2/calib3d/calib3d.hpp"
 #include "opencv2/core/core.hpp"
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 
 using namespace cv;