Digital Watchdog MEGApix DWC-MTT4WiA User Manual page 30

Enable the applicable detection that's desired.
Scene Change Detection: Alarms will be triggered if the scene of the monitor video
has changed.
Video Blur Detection: Alarms will be triggered if the video becomes blurry.
Abnormal Color Detection: Alarms will be triggered if the video becomes obscured.
Set the alarm holding time and alarm trigger options. The setup steps are the same
as motion detection. Please refer to motion detection chapter for details.
Click "Save" button to save the settings.
Set the sensitivity of the video tampering detection. Click "Sensitivity" tab to go to
the interface as shown below.
Drag the slider to set the sensitivity value or directly enter the sensitivity value in the
textbox. Click "Save" button to save the settings.
The sensitivity value of Scene Change Detection: The higher the value is, the
more sensitive the system responds to the amplitude of the scene change.
The sensitivity value of Video Blur Detection: The higher the value is, the more
sensitive the system responds to the blurriness of the image.
The sensitivity value of Abnormal Color Detection: The higher the value is, the
more sensitive the system responds to the obscuring of the image.
The requirements of camera and surrounding area
Auto-focusing function should not been enabled for video tampering detection.
Try not to enable video tampering detection when light changes greatly in the
scene.
Please contact us for more detailed application scenarios.