diff --git a/ext/opencv/gstcvdilate.cpp b/ext/opencv/gstcvdilate.cpp
index 9c1479d024..bc6b032165 100644
--- a/ext/opencv/gstcvdilate.cpp
+++ b/ext/opencv/gstcvdilate.cpp
@@ -41,6 +41,19 @@
  * Boston, MA 02110-1301, USA.
  */
 
+/**
+ * SECTION:element-cvdilate
+ *
+ * Dilates the image with the cvDilate OpenCV function.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch-1.0 videotestsrc ! cvdilate ! videoconvert ! autovideosink
+ * ]|
+ * </refsect2>
+ */
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
diff --git a/ext/opencv/gstcvequalizehist.cpp b/ext/opencv/gstcvequalizehist.cpp
index c92497fc28..ea1db289fd 100644
--- a/ext/opencv/gstcvequalizehist.cpp
+++ b/ext/opencv/gstcvequalizehist.cpp
@@ -41,6 +41,21 @@
  * Boston, MA 02110-1301, USA.
  */
 
+/**
+ * SECTION:element-cvequalizehist
+ *
+ * Equalizes the histogram of a grayscale image with the cvEqualizeHist OpenCV
+ * function.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch-1.0 videotestsrc pattern=23 ! cvequalizehist ! videoconvert ! autovideosink
+ * ]|
+ * </refsect2>
+ */
+
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
diff --git a/ext/opencv/gstcverode.cpp b/ext/opencv/gstcverode.cpp
index 75e2a1bb81..39b72be572 100644
--- a/ext/opencv/gstcverode.cpp
+++ b/ext/opencv/gstcverode.cpp
@@ -41,6 +41,19 @@
  * Boston, MA 02110-1301, USA.
  */
 
+/**
+ * SECTION:element-cverode
+ *
+ * Erodes the image with the cvErode OpenCV function.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch-1.0 videotestsrc ! cverode ! videoconvert ! autovideosink
+ * ]|
+ * </refsect2>
+ */
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
diff --git a/ext/opencv/gstcvlaplace.cpp b/ext/opencv/gstcvlaplace.cpp
index 56b74b2ec1..04cd575ae5 100644
--- a/ext/opencv/gstcvlaplace.cpp
+++ b/ext/opencv/gstcvlaplace.cpp
@@ -41,6 +41,19 @@
  * Boston, MA 02110-1301, USA.
  */
 
+/**
+ * SECTION:element-cvlaplace
+ *
+ * Applies cvLaplace OpenCV function to the image.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch-1.0 videotestsrc ! cvlaplace ! videoconvert ! autovideosink
+ * ]|
+ * </refsect2>
+ */
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
diff --git a/ext/opencv/gstcvsmooth.cpp b/ext/opencv/gstcvsmooth.cpp
index 1bf3b60d20..92e070daac 100644
--- a/ext/opencv/gstcvsmooth.cpp
+++ b/ext/opencv/gstcvsmooth.cpp
@@ -41,6 +41,19 @@
  * Boston, MA 02110-1301, USA.
  */
 
+/**
+ * SECTION:element-cvsmooth
+ *
+ * Smooths the image using thes cvSmooth OpenCV function.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch-1.0 videotestsrc ! cvsmooth ! videoconvert ! autovideosink
+ * ]|
+ * </refsect2>
+ */
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif
diff --git a/ext/opencv/gstcvsobel.cpp b/ext/opencv/gstcvsobel.cpp
index 2623cdca62..f1f67503e5 100644
--- a/ext/opencv/gstcvsobel.cpp
+++ b/ext/opencv/gstcvsobel.cpp
@@ -41,6 +41,19 @@
  * Boston, MA 02110-1301, USA.
  */
 
+/**
+ * SECTION:element-cvsobel
+ *
+ * Applies the cvSobel OpenCV function to the image.
+ *
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch-1.0 videotestsrc ! cvsobel ! videoconvert ! autovideosink
+ * ]|
+ * </refsect2>
+ */
+
 #ifdef HAVE_CONFIG_H
 #  include <config.h>
 #endif