One-shot – ALLIED Vision Technologies Guppy F-503 User Manual
Page 184
Controlling image capture
GUPPY Technical Manual V7.1.0
184
One-Shot
The camera can record an image by setting the one-shot bit in the 61Ch reg-
ister. This bit is automatically cleared after the image is captured. If the cam-
era is placed in Iso_Enable mode (see Chapter
187), this flag is ignored.
If one-shot mode is combined with the external trigger, the one-shot com-
mand is used to arm it. The following screenshot shows the sequence of com-
mands needed to put the camera into this mode. It enables the camera to
grab exactly one image with an external trigger edge.
If there is no trigger impulse after the camera has been armed, one-shot can
be cancelled by clearing the bit.
Note
•
Exposure times entered via the 81Ch register are mir-
rored in the extended register, but not vice versa.
•
Longer integration times not only increase sensitivity,
but may also increase some unwanted effects such as
noise and pixel-to-pixel non-uniformity. Depending on
the application, these effects may limit the longest
usable integration time.
•
Changes in this register have immediate effect, even
when the camera is transmitting.
•
Extended shutter becomes inactive after writing to a
format/mode/frame rate register.
Note
One-shot and Interlaced and Format_7 Mode_1 produces an
image, where the first field has different brightness due to
principal reasons.
Figure 103: One-shot control (SmartView)