Sensoray 2251 Rev.A - Manual (Page 37)

Motion Map
When motion is detected, an event is generated with data containing the region(s) of interest with
motion and a motion map. The motion map contains all the MBs which were hit inside a given
region. Note that some MBs will be shown outside the region (please see Example 2 in the motion
examples below). If the user sets one region to cover the whole image, then the Motion Map will
represent motion hits across the whole image. This allows the user to implement a custom MD
method on a macro-block by macro-block level.
A sample motion map where the region covers the full screen is shown below. The blank lines on
the bottom are not part of the image because the image was NTSC(480) not PAL(576). The demo
map shows macro-blocks up to number 36(576/16) in the vertical direction. The motion map (and
hit statistics) can be viewed by selecting View->MDStats. Select View->MDStats again to hide the
statistics and motion map.
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