AW00123409000 Image Acquisition Control
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6 Image Acquisition Control
This section provides detailed information about controlling image acquisition. You will find
information about triggering image acquisition, about setting the exposure time for image
acquisition, about controlling the camera’s image acquisition rate, and about how the camera’s
maximum allowed image acquisition rate can vary depending on the current camera settings.
6.1 Overview
This section presents an overview of the elements available for controlling the acquisition of
images. Reading this section will give you an idea about how these elements fit together and will
help you understand the detailed information in the sections below.
Four major elements are involved in controlling the acquisition of images:
Acquisition start and acquisition stop commands and the acquisition mode parameter
Frame burst start trigger
Frame start trigger
Exposure time control
Keep in mind that "frame" is typically used to mean a single acquired image.
When reading the material in this chapter, also refer to Figure 54 on page 111 and to the use case
diagrams in Section 6.11 on page 182. These diagrams illustrate the roles of the acquisition start
and stop commands, the acquisition mode, the frame burst start trigger, and the frame start trigger.
Acquisition Start and Stop Commands and the Acquisition Mode
The Acquisition Start command prepares the camera to acquire frames. The camera cannot acquire
frames unless an Acquisition Start command has first been executed.
The Acquisition Mode parameter has a direct bearing on how the Acquisition Start command
operates.
If the Acquisition Mode parameter is set to Single Frame, you can only acquire one frame after
executing an Acquisition Start command. When one frame has been acquired, the Acquisition Start
command will expire. Before attempting to acquire another frame, you must execute a new
Acquisition Start command.
The examples in this section mainly refer to I/O lines that are dedicated for either
input (Line1) or output (Line2). Note, however, that you can also configure the
GPIO lines (Line 3, Line 4) for input or output.
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