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Camera modes of operation 103
Line scan cameras
Line scan cameras are useful for capturing moving objects, such as on a conveyor
belt. Typically, line scan cameras are used for capturing 1-dimensional images, at
high speeds using continuous grabs.
Line scan cameras can be operated in one of the following modes: fixed line scan,
fixed line scan rate with frame trigger, fixed line scan rate with variable frame size,
Y variable line scan mode, variable line scan rate with frame trigger, or variable line
scan rate with variable frame size.
R Fixed line scan rate mode
In a fixed line scan mode (also called continuous line scan rate mode, or
A 5 free-running mode), the camera is set to continuous mode and does not require
synchronization signals from the frame grabber. The camera continuously outputs
IN 0 lines. The frequency depends on the exposure signal and frame rate settings on
the camera.
0 The pixel clock can be provided by either the camera or the frame grabber. Some
IM 2 cameras that require a pixel clock be provided as well as a clock exchange
PRE19L MAY mechanism.
