Update README.md

README.md

@@ -157,7 +157,7 @@ This will create **libORB_SLAM.so**  at *lib* folder and the executables **mono_
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 #8. Processing your own sequences
-You will need to create a settings file with the calibration of your camera. See the settings file provided for the TUM and KITTI datasets for monocular, stereo and RGB-D cameras. We use the calibration model of OpenCV. See the examples to learn how to create a program that makes use of the ORB-SLAM2 library and how to pass images to the SLAM system. Stereo input must be synchronized and rectified. RGB-D input must be synchronized.
+You will need to create a settings file with the calibration of your camera. See the settings file provided for the TUM and KITTI datasets for monocular, stereo and RGB-D cameras. We use the calibration model of OpenCV. See the examples to learn how to create a program that makes use of the ORB-SLAM2 library and how to pass images to the SLAM system. Stereo input must be synchronized and rectified. RGB-D input must be synchronized and depth registered.
 
 #9. SLAM and Localization Modes
 You can change between the *SLAM* and *Localization mode* using the GUI of the map viewer.