QNAP Security VioStor NVR (Version: 4.0.0) - Manual (Page 112)

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 Ignore objects with width or height less than this setting: Enable this option
to ignore all the objects smaller than the yellow zone.
f. Enable/Disable other options for video search.
 Pause when found: Enable this option and the video search will stop when a
video file matching the search criteria is found.
 Highlight the detection zone: The moving objects detected in the video will
be highlighted in red boxes; the foreign or missing objects will be highlighted
in yellow boxes; the video which is out of focus or obstructed will be
displayed in transparent red.
4. Click ‘Search’ to start searching the video by IVA. The results will be shown.