JAI GOX-12409C-PGE, Руководство пользователя

Страница: 26 / 79

Go-X Series Rolling Shutter GigE Vision I/F (Preliminary)
26
Global Reset
Use Global Reset for applications with moving objects.
When Global Reset is selected, moving objects can be captured without distortion as each pixel row
begins exposing at the same time. However, in this mode, the exposure time becomes longer for
the lower pixel rows, which results in a gradual increase in brightness from top to bottom. To
resolve this, use a strobe flash in a relatively low light environment.
Note : The strobe flash can be controlled by the ExposureActive signal. For more information, see
the ExposureActive Signal section.
ExposureActive Signal
When SensorShutterMode is set to Global Reset , control the strobe flash timing using the
ExposureActive signal . Start the flash at the rising edge of the ExposureActive signal and set the
flash period shorter than the exposure period. (The flash should complete before the falling edge of
the ExposureActive signal).
Caution When SensorShutterMode is set to Rolling , you cannot use a strobe flash because
each pixel row is exposed at a different timing and the lower pixel rows will not be
exposed.
The ExposureActive signal from the camera’s Digital IO outputs during the Line 1 ’s Exposure Active
period as shown below.
Related Setting Items : ImageFormatControl , DigitalIOControl