User manual

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Phantom Help File272

THE DISPLAY FIELD DESCRIPTIONS

Region Selector

The Auto-Trigger Region allows the uses the center point of a user selectable region of the

image, based on the image resolution setting. Selectable regions include:

· Center - specifies that the:

–

Height will be either 1/4 of the image height, or 16 pixels, whichever is larger, and the

–

Width will be either 1/4 of the image width, or 128 pixels, whichever is larger.

· Top Left quadrant.

· Top Right quadrant.

· Bottom Left quadrant.

· Bottom Right quadrant.

· Custom Region presently uses the same region as the Center option. However, it will be

user definable region in the future. This region will be definable via the Phantom Camera

Control Software interface.

· Full Screen. (Full image resolution.)

For details on the Region settings see: Phantom Miro Control via "Touch-Sensitive" LCD

Screen>Step-by-Step Procedures>Using Image-Based Auto-Trigger with a Phantom

Miro>Image-Based Auto-Trigger Region Tables.

Sensitivity Selector

The Sensitivity parameter defines both the:

· Area

The percentage of the auto-trigger region that must be active in order for an auto-trigger

event to be generated. A typical percentage value is 10.

· Threshold

The amount a pixel value must change in order to be counted as an active pixel for auto-

trigger purposes. A value of 100 would require a change of approximately half of the full

swing of the camera. A typical threshold setting would be 10.

A larger sensitivity setting means a lower area and threshold.

For details on the Sensitivity settings see: Phantom Miro Control via "Touch-Sensitive" LCD

Screen>Step-by-Step Procedures>Using Image-Based Auto-Trigger with a Phantom

Miro>Image-Based Auto-Trigger Sensitivity Table.

Update Selector

The Update, (Speed), Selector defines the number of frames between updates of the auto-trigger

reference memory. A value larger than 1 allows the trigger to activate on slower events.

Image changes are evaluated over a time interval of auto-trigger speed/frame rate.