diff --git a/modules/core/include/visp3/core/vpConvert.h b/modules/core/include/visp3/core/vpConvert.h
index eb012e5759..4771692d02 100644
--- a/modules/core/include/visp3/core/vpConvert.h
+++ b/modules/core/include/visp3/core/vpConvert.h
@@ -36,8 +36,8 @@
   \brief Tools for type or general conversion.
  */
 
-#ifndef _vpConvert_h_
-#define _vpConvert_h_
+#ifndef VP_CONVERT_H
+#define VP_CONVERT_H
 
 #include <visp3/core/vpConfig.h>
 
diff --git a/modules/core/include/visp3/core/vpMomentObject.h b/modules/core/include/visp3/core/vpMomentObject.h
index 3f601d7dc1..cd96e7cd03 100644
--- a/modules/core/include/visp3/core/vpMomentObject.h
+++ b/modules/core/include/visp3/core/vpMomentObject.h
@@ -66,7 +66,7 @@ class vpCameraParameters;
   used moment order as parameter.
 
   Then there are three ways to initialize a vpMomentObject. Firstly using
-  fromImage() you can considerer a dense object \e O defined by an image.
+  fromImage() you can consider a dense object \e O defined by an image.
   Secondly, as described in fromVector() you can also define a dense object \e O
   by a closed contour. In these two cases, 2D basic moments are defined by:
   \f[m_{ij} = \int \int_{O} x^i y^j dx dy\f]
diff --git a/modules/core/src/tracking/moments/vpMomentObject.cpp b/modules/core/src/tracking/moments/vpMomentObject.cpp
index 34ea1861c8..a521b03d23 100644
--- a/modules/core/src/tracking/moments/vpMomentObject.cpp
+++ b/modules/core/src/tracking/moments/vpMomentObject.cpp
@@ -274,6 +274,7 @@ void vpMomentObject::fromVector(std::vector<vpPoint> &points)
   \code
   #include <visp3/core/vpImage.h>
   #include <visp3/core/vpMomentObject.h>
+  #include <visp3/core/vpCameraParameters.h>
 
   #ifdef ENABLE_VISP_NAMESPACE
   using namespace VISP_NAMESPACE_NAME;
@@ -281,17 +282,14 @@ void vpMomentObject::fromVector(std::vector<vpPoint> &points)
 
   int main()
   {
-    vpCameraParameters cam;             // Camera parameters used for pixel to
-  meter conversion vpImage<unsigned char> I(288, 384); // Image used to define
-  the object
+    vpCameraParameters cam;             // Camera parameters used for pixel to meter conversion
+    vpImage<unsigned char> I(288, 384); // Image used to define the object
     // ... Initialize the image
 
-    unsigned char threshold = 128; // Gray level used to define which part of
-  the image belong to the dense object
+    unsigned char threshold = 128; // Gray level used to define which part of the image belong to the dense object
 
-    vpMomentObject obj(3); // Create an image moment object with 3 as maximum
-  order obj.fromImage(I, threshold, cam); // Initialize the object from the
-  image
+    vpMomentObject obj(3); // Create an image moment object with 3 as maximum order
+    obj.fromImage(I, threshold, cam); // Initialize the object from the image
 
     return 0;
   }
diff --git a/modules/io/include/visp3/io/vpVideoReader.h b/modules/io/include/visp3/io/vpVideoReader.h
index 1e2a9ebb3a..d7421604dc 100644
--- a/modules/io/include/visp3/io/vpVideoReader.h
+++ b/modules/io/include/visp3/io/vpVideoReader.h
@@ -124,6 +124,8 @@ BEGIN_VISP_NAMESPACE
  * to match the first and image images of the sequence.
  *
  * \code
+ * #include <visp3/core/vpRGBa.h>
+ * #include <visp3/core/vpImage.h>
  * #include <visp3/io/vpVideoReader.h>
  *
  * #ifdef ENABLE_VISP_NAMESPACE
@@ -151,6 +153,8 @@ BEGIN_VISP_NAMESPACE
  *
  * Note that it is also possible to access to a specific frame using getFrame().
  * \code
+ * #include <visp3/core/vpRGBa.h>
+ * #include <visp3/core/vpImage.h>
  * #include <visp3/io/vpVideoReader.h>
  *
  * #ifdef ENABLE_VISP_NAMESPACE
diff --git a/modules/io/src/video/vpVideoReader.cpp b/modules/io/src/video/vpVideoReader.cpp
index 0e32a78a41..5e41b8b012 100644
--- a/modules/io/src/video/vpVideoReader.cpp
+++ b/modules/io/src/video/vpVideoReader.cpp
@@ -822,6 +822,8 @@ bool vpVideoReader::isVideoExtensionSupported() const
   \param I : The captured image.
 
   \code
+  #include <visp3/core/vpRGBa.h>
+  #include <visp3/core/vpImage.h>
   #include <visp3/io/vpVideoReader.h>
 
   #ifdef ENABLE_VISP_NAMESPACE
@@ -855,6 +857,8 @@ vpVideoReader &vpVideoReader::operator>>(vpImage<unsigned char> &I)
   \param I : The captured image.
 
   \code
+  #include <visp3/core/vpRGBa.h>
+  #include <visp3/core/vpImage.h>
   #include <visp3/io/vpVideoReader.h>
 
   #ifdef ENABLE_VISP_NAMESPACE