AW00089317000 Image Acquisition Control
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7 Image Acquisition Control
This chapter provides detailed information about controlling image acquisition. You will find
information about
triggering image acquisition,
setting the exposure time for acquired images,
controlling the camera’s image acquisition rate, and
how the camera’s maximum allowed image acquisition rate can vary depending on the current
camera settings.
7.1 Overview
This section presents an overview of the elements involved with controlling the acquisition of
images. Reading this section will give you an idea about how these elements fit together and will
make it easier to understand the detailed information in the sections that follow.
Four major elements are involved in controlling the acquisition of images:
Acquisition start and acquisition stop commands and the acquisition mode parameter
The acquisition start trigger
The frame start trigger
Exposure time control
When reading the explanations in the overview and in this entire chapter, keep in mind that the term
"frame" is typically used to mean a single acquired image.
When reading the material in this chapter, it is helpful to refer to Figure 50 on page 85 and to the
use case diagrams in Section 7.11 on page 148. These diagrams present the material related to the
acquisition start and stop commands, the acquisition mode, the acquisition start trigger, and the
frame start trigger in a graphical format.
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.
A parameter called the Acquisition Mode 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
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