add testing platform pictures

README.md

@@ -6,6 +6,13 @@
     <img src="./config/doc/demo.gif" alt="drawing" width="800"/>
 </p>
 
+<p align='center'>
+    <img src="./config/doc/device-hand-2.png" alt="drawing" width="200"/>
+    <img src="./config/doc/device-hand.png" alt="drawing" width="200"/>
+    <img src="./config/doc/device-jackal.png" alt="drawing" width="200"/>
+    <img src="./config/doc/device-boat.png" alt="drawing" width="200"/>
+</p>
+
 ## Menu
 
   - [**System architecture**](#system-architecture)

config/params.yaml

@@ -13,7 +13,7 @@ lio_sam:
   poseCovThreshold: 25.0                      # m^2, threshold for using GPS data
   
   # Export settings
-  savePCD: false
+  savePCD: false                              # https://github.com/TixiaoShan/LIO-SAM/issues/3
   savePCDDirectory: "/Downloads/LOAM/"        # in your home folder, starts and ends with "/". Warning: the code deletes "LOAM" folder then recreates it. See "mapOptimization" for implementation
 
   # Sensor Settings