Operating Instructions and Installation Instructions

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TransVu Express
Masked Cam Detection
TransVu Express has the capability to identify if a video input has been covered (by hand, spray
paint, etc.) to prevent video images being viewed and recorded. The Camera Masking option
identies normal levels of contrast and uses them as a base line. It then compares these against
a user dened minimum contrast level. If the video input goes below this user dened level for a
specied time, an event is generated on the unit. This web page allows the masking feature to be
congured.
Drop Down select Switch between Simple and Zone Activation.
Simple Activation
Camera Lists available camera channels.
On Select to use Masked Detection on relevant camera.
Dwell Time Enter a time (in seconds). If camera masking is detected for longer
than the time period entered here, an event will
be generated.
Threshold Enter a contrast level threshold. If the camera contrast level drops
below this threshold, the dwell time setting will activate.
Contrast Details the current contrast level from each connected camera.
Create Database Entry Select to create a database entry for any Masked Camera Detection
activity.