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4.
To erase portions of the mask, click on an area with a blue box in it and
drag the cursor to wherever the mask should be eliminated.
5.
To eliminate a motion mask, click the Clear Mask button.
The changes are applied automatically. For the mask to apply to recording, you
must record in Motion mode; the mask does not affect recording in Free mode.
Tip
If there is only one small area where motion events need to be de-
tected, you can instead mask that area and then click the Invert Mask
button. This makes defining a large mask much quicker.
ADJUSTING MOTION SENSITIVITY
The Motion tab on the Setup page allows you to configure MasterControl's mo-
tion sensitivity. There you can adjust the following three settings:
•
Percentage Area—the percentage of an image that must differ from the
previous image for MasterControl to recognize motion. For example, if
you set this to 2000, approximately 20 percent of a captured image must
differ from the previous captured image for MasterControl to begin re-
cording.
•
Sensitivity—the pixel value change required for MasterControl to rec-
ognize motion. For example, suppose you set a high Sensitivity level. If
each pixel of video changes only a little bit (perhaps if it falls into a dim
shadow), recording is not triggered.
•
Number of Frames Between Reference—allows MasterControl to con-
tinuously create a new reference image to compare future images to. For
example, if a location being captured is becoming darker (perhaps if the
sun is setting), MasterControl can reset its reference image every 50 im-
ages so that light-level changes that occur during that time aren't com-
pared to drastically different light levels that were present more than 50
images earlier.
See the previous section, "Understanding Motion Detection," for a more technical
explanation of how motion detection works.
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