Basler SCOUT LIGHT User Manual download pdf (Page 46)

Image Acquisition Control

38 Basler scout light

6.1.2 Acquiring One Image at a Time

In “single frame” operation, the camera acquires and transmits a single image. To select single

frame operation, the camera’s Acquisition Mode parameter must be set to Single Frame.

To begin image acquisition, execute an Acquisition Start command. Exposure time is determined

by the value of the camera’s exposure time parameter.

When using the single frame method to acquire images, you must not begin acquiring a new image

until the previously captured image has been completely transmitted to the host PC.

You can set the Acquisition Mode parameter value from within your application software by using

the pylon API. The following code snippet illustrates using the API to set the parameter value:

Camera.AcquisitionMode.SetValue( AcquisitionMode_SingleFrame );

You can also execute the Acquisition Start command by using the API.

For detailed information about using the pylon API, refer to the Basler pylon Programmer’s Guide

and API Reference.

You can also use the Basler pylon Viewer application to easily set the parameters.

For more information about the pylon Viewer, see Section 3.1 on page 17.

For more information about the camera’s exposure time parameter, see Section 6.4 on page 51.

6.1.3 Acquiring Images Continuously (Free-run)

In “continuous frame” operation, the camera continuously acquires and transmits images. To select

continuous frame operation, the camera’s Acquisition Mode parameter must be set to Continuous.

(Note that operating the camera in continuous frame mode without the use of a trigger is also

commonly called "free run".)

To begin acquiring images, issue an Acquisition Start command. The exposure time for each image

is determined by the value of the camera’s exposure time parameter. Acquisition start for the

second and subsequent images is automatically controlled by the camera. Image acquisition and

transmission will stop when you execute an Acquisition Stop command.

When the camera is operating in continuous frame mode without triggering, the acquisition frame

rate is determined by the Acquisition Frame Rate Abs parameter:

 If the parameter is enabled and set to a value less than the maximum allowed acquisition

frame rate, the camera will acquire images at rate specified by the parameter setting.

 If the parameter is disabled or is set to a value greater than the maximum allowed acquisition

frame rate, the camera will acquire images at the maximum allowed.

Note that before you can use the Acquisition Frame Rate Abs parameter to control the frame rate,

the parameter must be enabled.

You can set the Acquisition Mode parameter value and you can enable and set the Acquisition

Frame Rate Abs parameter from within your application software by using the pylon API. The

following code snippets illustrate using the API to set the parameter values:

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Basler SCOUT LIGHT User Manual Page 46