D-Link DCS-6616 User Manual page 34

Section 3 - Configuration
Auto Calibration:
Turning this option on will automatically calibrate the
camera when needed to ensure that the
2DNR:
This option turns on 2D noise reduction which may
improve picture quality.
3DNR:
This option turns on 3D noise reduction which may further
improve image quality.
Tilt Angle:
The option allows you to adjust the minimum and
maximum tilt angle of the camera.
D-Link DCS-6616 User Manual 34