National Instruments Image Acqusition Software NI-IMAQdx Manual De Usuario

© National Instruments Corporation

The Increment values are camera-specific. Refer to the camera 
documentation or query the Increment attributes for width and height
to obtain the actual values.

Figure 3-2.  Partial Image Size Format (Scalable)

The IIDC 1.31 and GigE Vision 1.0 specifications provide several external 
triggering modes for cameras. A camera may support one or more of the 
triggering modes. Additionally, a camera may support triggering modes 
that are vendor specific. Refer to your camera documentation to find out 
which standard modes are supported.

Configure triggers before configuring and starting the acquisition. Use the 
Camera Attribute functions to configure the triggers.

All IIDC cameras that support triggering have the following attributes:

•

TriggerMode—Specifies one of the trigger modes—Mode0, 
Mode1...Mode5—described in the following sections. A value of Off 
indicates that the camera is not externally triggered. 

•

TriggerActivation—Specifies when the trigger input is active. A 
value of LevelHigh indicates that the trigger is considered active when 
the signal is high. A value of LevelLow indicated that the trigger is 
considered active when the signal is low. 

(max width, max height)

Acquired Sub-Image

Offset X

Offset Y

Height

Increment

Width

Increment

(0,0)