IMAQ1394 Configure Acquisition
Configures a low-level acquisition previously opened with IMAQ1394 Init. Specify the acquisition type with the Continuous? and Number of buffers parameters.
Snap | Continuous = 0 | Buffer Count = 1 |
Sequence | Continuous = 0 | Buffer Count > 1 |
Grab | Continuous = 1 | Buffer Count ³ 1 |
Note National Instruments recommends using three or more buffers for continuous acquisitions. |
Use IMAQ1394 Clear Acquisition to unconfigure the acquisition.
Region of Interest
specifies a rectangular portion of the image to be transferred into LabVIEW memory. This parameter is defined by an array of four elements: [Left, Top, Right, Bottom].
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IMAQ1394 Session In is a unique reference to the camera, which you can obtain with IMAQ1394 Init. | |||||||
Continuous? specifies whether the acquisition is continuous or one-shot. | |||||||
Number of Buffers For a one-shot acquisition, this parameter specifies the number of images to acquire. For a continuous acquisition, this parameter specifies the number of buffers the driver uses internally. | |||||||
error in (no error)
is a cluster that describes the error status before this VI executes. If error in indicates that an error occurred before this VI was called, this VI may choose not to execute its function, but just pass the error through to its error out cluster. If no error has occurred, then this VI executes normally and sets its own error status in error out. Use the error handler VIs to look up the error code and to display the corresponding error message. Using the error in and error out clusters is a convenient way to check errors and to specify execution order by wiring the error output from one subVI to the error input of the next.
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IMAQ1394 Session Out is a unique reference to the camera. IMAQ1394 Session Out is the same as IMAQ1394 Session In. | |||||||
error out
is a cluster that describes the error status after this VI executes. If an error occurred before this VI was called, error out is the same as error in. Otherwise, error out shows the error, if any, that occurred in this VI. Use the error handler VIs to look up the error code and to display the corresponding error message. Using error in and error out clusters is a convenient way to check errors and to specify execution order by wiring the error output from one subVI to the error input of the next.
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Note Refer to Error Handling for error input and output information and error codes. |