calib3d module in opencv is split into 3 modules: 3d, calib and stereo.

stereo module in opencv_contrib is renamed to xstereo

samples/cpp/tutorial_code/features2D/Homography/decompose_homography.cpp

@@ -1,7 +1,8 @@
 #include <iostream>
 #include <opencv2/core.hpp>
 #include <opencv2/highgui.hpp>
-#include <opencv2/calib3d.hpp>
+#include <opencv2/3d.hpp>
+#include <opencv2/calib.hpp>
 
 using namespace std;
 using namespace cv;