AVT GigE Cameras Installation Manual V1.1.0
51
Troubleshooting
•
Linux only
: Run as root, allowing the OS to boost the priority of the Allied
Vision driver thread, and the driver to bind directly to the NIC adapter.
Users who feel running as root compromises their system security may
find the following implementation satisfactory:
– Set the executable owner as root
– Set the “setuid” permission bit on the executable
– In code, when application starts use capset() to release all but these
privileges: CAP_SYS_NICE, CAP_NET_ADMIN, CAP_NET_BROADCAST,
CAP_NET_RAW. The application will start with all root privileges, but it
will drop them immediately after startup
Troubleshooting for Bigeye G cameras only (IOD mode)
If the camera can be detected but no images can be grabbed:
Verify the camera operation mode: Make sure the camera operates in
continuous mode, and not in IOD mode.
General description:
•
Continuous mode: The camera generates the images with a constant
exposure time autonomously.
•
Image on Demand (IOD): the camera produces no image until a trigger
impulse is generated.
Controls
IODMode
Controls
Exposure
ExposureAuto/ExposureMode
Trigger mode
Description
Continuous Off/Manual
Freerun
Camera generates images with a con-
stant exposure time autonomously. The
exposure time cannot be adjusted.
Continuous Off/Manual
LineX/SyncInX Camera waits for an impulse at the
selected trigger input pin to start a
continuous image output.
IOD
Off/Manual
Freerun
Camera produces images autonomously.
The exposure time can be adjusted.
IOD
Off/Manual
LineX/SyncInX Camera produces a single image for
every impulse at the selected trigger
input pin. The exposure time is defined
by
ExposureTimeAbs
/
ExposureValue
.
IOD
Other/External
LineX/SyncInX Camera produces a single image for
every impulse at the selected trigger
input pin. The pulse width defines the
exposure time.
Table 5: Comparison of IOD modes and trigger modes
