diff --git a/apps/interactive-calibration/calibCommon.hpp b/apps/interactive-calibration/calibCommon.hpp
index 31c74b440a..6acf610897 100644
--- a/apps/interactive-calibration/calibCommon.hpp
+++ b/apps/interactive-calibration/calibCommon.hpp
@@ -1,8 +1,13 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #ifndef CALIB_COMMON_HPP
 #define CALIB_COMMON_HPP
 
-#include <memory>
 #include <opencv2/core.hpp>
+
+#include <memory>
 #include <vector>
 #include <string>
 
diff --git a/apps/interactive-calibration/calibController.cpp b/apps/interactive-calibration/calibController.cpp
index 186d373aca..1888ee57db 100644
--- a/apps/interactive-calibration/calibController.cpp
+++ b/apps/interactive-calibration/calibController.cpp
@@ -1,8 +1,13 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #include "calibController.hpp"
 
 #include <algorithm>
 #include <cmath>
 #include <ctime>
+
 #include <opencv2/calib3d.hpp>
 #include <opencv2/imgproc.hpp>
 
diff --git a/apps/interactive-calibration/calibController.hpp b/apps/interactive-calibration/calibController.hpp
index 170a80a954..7a0f3f76d0 100644
--- a/apps/interactive-calibration/calibController.hpp
+++ b/apps/interactive-calibration/calibController.hpp
@@ -1,7 +1,12 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #ifndef CALIB_CONTROLLER_HPP
 #define CALIB_CONTROLLER_HPP
 
 #include "calibCommon.hpp"
+
 #include <stack>
 #include <string>
 #include <ostream>
diff --git a/apps/interactive-calibration/calibPipeline.cpp b/apps/interactive-calibration/calibPipeline.cpp
index 4575a7024a..1047bfce5f 100644
--- a/apps/interactive-calibration/calibPipeline.cpp
+++ b/apps/interactive-calibration/calibPipeline.cpp
@@ -1,5 +1,11 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #include "calibPipeline.hpp"
+
 #include <opencv2/highgui.hpp>
+
 #include <stdexcept>
 
 using namespace calib;
diff --git a/apps/interactive-calibration/calibPipeline.hpp b/apps/interactive-calibration/calibPipeline.hpp
index b5d311e17f..1c22b0d85e 100644
--- a/apps/interactive-calibration/calibPipeline.hpp
+++ b/apps/interactive-calibration/calibPipeline.hpp
@@ -1,7 +1,13 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+
 #ifndef CALIB_PIPELINE_HPP
 #define CALIB_PIPELINE_HPP
 
 #include <vector>
+
 #include <opencv2/highgui.hpp>
 
 #include "calibCommon.hpp"
diff --git a/apps/interactive-calibration/frameProcessor.cpp b/apps/interactive-calibration/frameProcessor.cpp
index 57e1d97d81..1e672b0c45 100644
--- a/apps/interactive-calibration/frameProcessor.cpp
+++ b/apps/interactive-calibration/frameProcessor.cpp
@@ -1,3 +1,7 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #include "frameProcessor.hpp"
 #include "rotationConverters.hpp"
 
@@ -5,6 +9,7 @@
 #include <opencv2/imgproc.hpp>
 #include <opencv2/aruco/charuco.hpp>
 #include <opencv2/highgui.hpp>
+
 #include <vector>
 #include <string>
 #include <algorithm>
diff --git a/apps/interactive-calibration/frameProcessor.hpp b/apps/interactive-calibration/frameProcessor.hpp
index 119910ad46..4dbb8ab314 100644
--- a/apps/interactive-calibration/frameProcessor.hpp
+++ b/apps/interactive-calibration/frameProcessor.hpp
@@ -1,9 +1,14 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #ifndef FRAME_PROCESSOR_HPP
 #define FRAME_PROCESSOR_HPP
 
 #include <opencv2/core.hpp>
 #include <opencv2/aruco/charuco.hpp>
 #include <opencv2/calib3d.hpp>
+
 #include "calibCommon.hpp"
 #include "calibController.hpp"
 
diff --git a/apps/interactive-calibration/main.cpp b/apps/interactive-calibration/main.cpp
index 051b24cf2c..af62d4ea40 100644
--- a/apps/interactive-calibration/main.cpp
+++ b/apps/interactive-calibration/main.cpp
@@ -1,8 +1,13 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #include <opencv2/core.hpp>
 #include <opencv2/calib3d.hpp>
 #include <opencv2/aruco/charuco.hpp>
 #include <opencv2/cvconfig.h>
 #include <opencv2/highgui.hpp>
+
 #include <string>
 #include <vector>
 #include <stdexcept>
diff --git a/apps/interactive-calibration/parametersController.cpp b/apps/interactive-calibration/parametersController.cpp
index c9356902da..d581582cb6 100644
--- a/apps/interactive-calibration/parametersController.cpp
+++ b/apps/interactive-calibration/parametersController.cpp
@@ -1,4 +1,9 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #include "parametersController.hpp"
+
 #include <iostream>
 
 template <typename T>
diff --git a/apps/interactive-calibration/parametersController.hpp b/apps/interactive-calibration/parametersController.hpp
index 6477901990..616f4e7799 100644
--- a/apps/interactive-calibration/parametersController.hpp
+++ b/apps/interactive-calibration/parametersController.hpp
@@ -1,8 +1,14 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #ifndef PARAMETERS_CONTROLLER_HPP
 #define PARAMETERS_CONTROLLER_HPP
 
 #include <string>
+
 #include <opencv2/core.hpp>
+
 #include "calibCommon.hpp"
 
 namespace calib {
diff --git a/apps/interactive-calibration/rotationConverters.cpp b/apps/interactive-calibration/rotationConverters.cpp
index dee3b531d6..ff31c9e380 100644
--- a/apps/interactive-calibration/rotationConverters.cpp
+++ b/apps/interactive-calibration/rotationConverters.cpp
@@ -1,6 +1,11 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
 #include "rotationConverters.hpp"
 
 #include <cmath>
+
 #include <opencv2/calib3d.hpp>
 #include <opencv2/core.hpp>
 
diff --git a/apps/interactive-calibration/rotationConverters.hpp b/apps/interactive-calibration/rotationConverters.hpp
index bddce3eb30..fcb5bcc59c 100644
--- a/apps/interactive-calibration/rotationConverters.hpp
+++ b/apps/interactive-calibration/rotationConverters.hpp
@@ -1,5 +1,9 @@
-#ifndef RAOTATION_CONVERTERS_HPP
-#define RAOTATION_CONVERTERS_HPP
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+
+#ifndef ROTATION_CONVERTERS_HPP
+#define ROTATION_CONVERTERS_HPP
 
 #include <opencv2/core.hpp>