Extract imgcodecs module from highgui

samples/cpp/tutorial_code/ImgProc/AddingImages.cpp

@@ -4,6 +4,7 @@
  * @author OpenCV team
  */
 
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <iostream>
 

samples/cpp/tutorial_code/ImgProc/BasicLinearTransforms.cpp

@@ -4,6 +4,7 @@
  * @author OpenCV team
  */
 
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <iostream>
 

samples/cpp/tutorial_code/ImgProc/Morphology_1.cpp

@@ -5,6 +5,7 @@
  */
 
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <stdlib.h>
 #include <stdio.h>

samples/cpp/tutorial_code/ImgProc/Morphology_2.cpp

@@ -5,6 +5,7 @@
  */
 
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <stdlib.h>
 #include <stdio.h>

samples/cpp/tutorial_code/ImgProc/Pyramids.cpp

@@ -5,6 +5,7 @@
  */
 
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <math.h>
 #include <stdlib.h>

samples/cpp/tutorial_code/ImgProc/Smoothing.cpp

@@ -7,6 +7,7 @@
 #include <vector>
 
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include "opencv2/features2d/features2d.hpp"
 

samples/cpp/tutorial_code/ImgProc/Threshold.cpp

@@ -5,6 +5,7 @@
  */
 
 #include "opencv2/imgproc/imgproc.hpp"
+#include "opencv2/imgcodecs.hpp"
 #include "opencv2/highgui/highgui.hpp"
 #include <stdlib.h>
 #include <stdio.h>