Luma Surveillance LUM-500-DVR-16CH, Technical Reference Manual, Page: 147 / 217

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Web Interface
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Video Tampering
Video tampering detects the attempt to obscure a camera’s
surveillance by blocking its view or covering its lens.
You set up this option for each camera independently. Generally
speaking, there is no reason not to have video tampering detection
on.
At the top, choose the camera to edit. You must also check
Enable Video Tampering to set up the selected camera’s detection
operations. The main section of the window is divided into three
tabs: Area Setting, Arming Schedule, and Linkage Method.
To accept your settings, you must click Save before switching to
another camera or menu item.
Area Settings
You can designate one area on each camera for a video tampering
mask. This mask blocks the camera from detecting tampering in
a given portion of the camera’s field of view. This is useful if, for
example, a door swings into part of the frame when opened. Rather
than have the door create a false alarm every time it is opened, you
can mask off that portion of the screen to exclude it.
To create an area, click the Draw Area button, then click-and-drag
your mouse across the live feed. A gray box appears. You can select
a box you have drawn by clicking on it. You can resize a selected
box by clicking and dragging on one of the red dots around its
perimeter, or move it around the screen by clicking and dragging on
its gray center.
You can always click Clear All to remove the video tampering mask.
Sensitivity: This slider determines how picky your camera is when
detecting video tampering. If you are getting false positives, it may
be that your camera’s sensitivity is too high, or some background
event is confusing it. Moving the slider to the right makes your
camera more sensitive to video tampering; moving the slider to the
left makes it less sensitive.
Arming Schedule
The main portion of the window shows the current schedule for the
selected camera. Each box covers one hour of time (with a dotted