Update README.md

README.md

 # depthdense_camera_ros
-ROS node to acquire RGB and 3D data from SoftKinetic DepthSense cameras.
+ROS node to acquire RGB and 3D data from SoftKinetic DepthSense cameras (for instance Creative Senz3d or DS325).
 
-Wrapper for ROS of Depth Sense SDK ( cameras Creative Senz3d o DS325). 
-Based on the wrapper developed by Walter Lucetti aka Myzhar 
-https://github.com/Myzhar/ros_depthsense_camera
+Based on the ROS node developed by Walter Lucetti aka Myzhar https://github.com/Myzhar/ros_depthsense_camera.
+
+This node fix a problem, that we had, with the integration with ros_pcl. This problem appeared when we
+try to convert PointCloud2 message in pcl PointCloud, our program raised this error message:
+```
+Failed to find match for field 'x'.
+Failed to find match for field 'y'.
+Failed to find match for field 'z'.
+```