User manual

Phantom Help File290
© 2010 Vision Research - An AMETEK Company
considered “active" if its level has changed, (brightened or darkened), by more than a preset
threshold. The number of active pixels for a given frame is counted, and if it exceeds a set
number, a trigger is generated. The required number of active pixels is specified as a percentage
of the area of the Auto-Trigger region.
Image-Based Auto-Trigger Operating Modes
· Mode 0 - Image-Based Auto-Trigger is disabled.
· Mode 1 - Camera will drive both the auto-trigger and trigger itself when an auto-trigger is
detected. If the auto-trigger signal is pulled low by an external device, the camera will be
triggered.
· Mode 2 - The image changes are analyzed, and when an auto-trigger condition has been
detected, the auto-trigger signal will be pulled low, as in Mode 1. However, the camera will not
trigger itself. An external device pulling the auto-trigger signal low will not trigger the camera
either.
· Mode 2 is useful when external control of the auto-trigger is desired, for instance, it is required
that the auto-trigger feature is disabled for some known transient event). The auto-trigger
signal from the camera will be routed through some external device and back into the trigger
input of the camera.
STEP-BY-STEP PROCEDURES
1.
Access the Power Off Display Screen.
2.
From the Power Off Display Screen gently tap directly on the ATRIG field to open the Image-
Based Auto-Trigger Display Screen.
3.
In the Image-Based Auto-Trigger Display Screen select the desired Image-Based Auto-Trigger
parameters, including:
Auto-Trigger Region
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
· 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
Sensitivity
The Sensitivity parameter defines both the: