# Example of ROS "melodic" version
  $ sudo apt-get install ros-melodic-realsense2-camera 
Reference Site: https://github.com/IntelRealSense/realsense-ros/releases
  # Dependencies
  $ sudo apt-get install git libssl-dev libusb-1.0-0-dev pkg-config libgtk-3-dev
  $ sudo apt-get install libglfw3-dev libgl1-mesa-dev libglu1-mesa-dev
        
  # Unzip librealsense.zip
  $ cd librealsense
  $ mkdir build
  $ cd build
  $ cmake .. -DCMAKE_BUILD_TYPE=Release
  $ sudo make uninstall 
  $ make clean
  $ time make -j8 
  $ sudo make install
Intel T265 Tracking Camera related launch file
  $ roscd realsense2_camera
  $ cd launch
  $ roslaunch rs_t265.launch
Intel D435i & D455i RGB-D Camera
  $ roscd realsense2_camera
  $ cd launch
  $ roslaunch rs_camera.launch
Settings of camera
  $ roscd realsense2_camera
  $ cd launch/includes
  $ gedit nodelet.launch.xml
        
  ##### Default settings in nodelet.launch.xml file #####
  # Depth related
  <arg name="depth_width"         default="640"/>
  <arg name="depth_height"        default="480"/>
  <arg name="enable_depth"        default="true"/>
        
  # Infra related
  <arg name="infra_width"         default="640"/>
  <arg name="infra_height"        default="480"/>
  <arg name="enable_infra"        default="false"/>
  <arg name="enable_infra1"       default="false"/>
  <arg name="enable_infra2"       default="false"/>
  <arg name="infra_rgb"           default="false"/>
        
  # Color related
  <arg name="color_width"         default="640"/>
  <arg name="color_height"        default="480"/>
  <arg name="enable_color"        default="true"/>
        
  # Built-in IMU related
  <arg name="gyro_fps"            default="200"/>
  <arg name="accel_fps"           default="63"/>
  <arg name="enable_gyro"         default="false"/>
  <arg name="enable_accel"        default="false"/>
  <arg name="unite_imu_method"    default="linear_interpolation"/> \
  <!-- Options are: [none, copy, linear_interpolation] -->
        
  # High ACC emitter off
  <arg name="json_file_path"      default="$(find ~)/high_acc_emitter_off.json"/>
        
  # Reset prior camera when restart launch file
  <arg name="initial_reset"       default="false"/>
[High_acc_emitter_off.json]
  {
      "aux-param-autoexposure-setpoint": "1536",
      "aux-param-colorcorrection1": "0.298828",
      "aux-param-colorcorrection10": "-0",
      "aux-param-colorcorrection11": "-0",
      "aux-param-colorcorrection12": "-0",
      "aux-param-colorcorrection2": "0.293945",
      "aux-param-colorcorrection3": "0.293945",
      "aux-param-colorcorrection4": "0.114258",
      "aux-param-colorcorrection5": "-0",
      "aux-param-colorcorrection6": "-0",
      "aux-param-colorcorrection7": "-0",
      "aux-param-colorcorrection8": "-0",
      "aux-param-colorcorrection9": "-0",
      "aux-param-depthclampmax": "65536",
      "aux-param-depthclampmin": "0",
      "aux-param-disparityshift": "0",
      "controls-autoexposure-auto": "True",
      "controls-autoexposure-manual": "8500",
      "controls-color-autoexposure-auto": "True",
      "controls-color-autoexposure-manual": "166",
      "controls-color-backlight-compensation": "0",
      "controls-color-brightness": "0",
      "controls-color-contrast": "50",
      "controls-color-gain": "64",
      "controls-color-gamma": "300",
      "controls-color-hue": "0",
      "controls-color-power-line-frequency": "3",
      "controls-color-saturation": "64",
      "controls-color-sharpness": "50",
      "controls-color-white-balance-auto": "True",
      "controls-color-white-balance-manual": "4600",
      "controls-depth-gain": "16",
      "controls-laserpower": "150",
      "controls-laserstate": "off",
      "ignoreSAD": "0",
      "param-amplitude-factor": "0",
      "param-autoexposure-setpoint": "1536",
      "param-censusenablereg-udiameter": "6",
      "param-censusenablereg-vdiameter": "7",
      "param-censususize": "6",
      "param-censusvsize": "7",
      "param-depthclampmax": "65536",
      "param-depthclampmin": "0",
      "param-depthunits": "1000",
      "param-disableraucolor": "0",
      "param-disablesadcolor": "0",
      "param-disablesadnormalize": "0",
      "param-disablesloleftcolor": "0",
      "param-disableslorightcolor": "1",
      "param-disparitymode": "0",
      "param-disparityshift": "0",
      "param-lambdaad": "751",
      "param-lambdacensus": "6",
      "param-leftrightthreshold": "10",
      "param-maxscorethreshb": "2893",
      "param-medianthreshold": "796",
      "param-minscorethresha": "4",
      "param-neighborthresh": "108",
      "param-raumine": "6",
      "param-rauminn": "3",
      "param-rauminnssum": "7",
      "param-raumins": "2",
      "param-rauminw": "2",
      "param-rauminwesum": "12",
      "param-regioncolorthresholdb": "0.785714",
      "param-regioncolorthresholdg": "0.565558",
      "param-regioncolorthresholdr": "0.985323",
      "param-regionshrinku": "3",
      "param-regionshrinkv": "0",
      "param-robbinsmonrodecrement": "25",
      "param-robbinsmonroincrement": "2",
      "param-rsmdiffthreshold": "1.65625",
      "param-rsmrauslodiffthreshold": "0.71875",
      "param-rsmremovethreshold": "0.809524",
      "param-scanlineedgetaub": "13",
      "param-scanlineedgetaug": "15",
      "param-scanlineedgetaur": "30",
      "param-scanlinep1": "155",
      "param-scanlinep1onediscon": "160",
      "param-scanlinep1twodiscon": "59",
      "param-scanlinep2": "190",
      "param-scanlinep2onediscon": "507",
      "param-scanlinep2twodiscon": "493",
      "param-secondpeakdelta": "647",
      "param-texturecountthresh": "0",
      "param-texturedifferencethresh": "1722",
      "param-usersm": "1",
      "param-zunits": "1000",
      "stream-depth-format": "Z16",
      "stream-fps": "30",
      "stream-height": "480",
      "stream-ir-format": "R8L8",
      "stream-width": "640"
  }
