4 Design and function
3DPIXA
CD40131 Version 1
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4.9
Image capture modes
The 3DPIXA can be operated in different frame and line trigger synchronization modes. The
modes for setting up the camera and camera image acquisition are explained for 3DPIXA
compact and dual models.
Frame grabber requirements:
For correct image acquisition, the frame grabber has to be set to area mode. The camera
provides the frame grabber with the FrameValid (FVAL) signal. In this setup, the image
capturing of the camera is synchronized with the frame grabber. Especially when using a
3DPIXA dual camera, this setup is obligatory for correct image synchronization between the
master camera, the slave camera and the frame grabber.
4.9.1
3DPIXA in free running mode without frame and line trigger
For setting up the 3DPIXA, it is necessary to execute white balancing (see chapter 6.12,
p. 68) and internal black referencing (see chapter 6.13, p. 76). To perform those steps, the
3DPIXA has to be set into free running mode without external frame trigger and without
external line trigger (camera is in frame free run mode and line free run mode).
This configuration of the camera is not suitable for capturing images for 3D calculation,
since there is no defined synchronization between the camera and the moving object.
3DPIXA compact
The free running mode without external frame trigger signal and without external line trigger
signal is used to carry out white balancing and internal black (offset) referencing.
Camera parameter
Value
Comment
Integration time/
Line period time
Time in µs
Integration time / line period time has to be set.
Frame start
(triggered frame scan)
free running
No external frame trigger signal is used. The
camera is capturing lines all the time. The FVAL is
generated in respect of the image height (number
of scan lines per image) set in the camera.
Encoder / line trigger
disabled
No external encoder / line trigger signal is used.
The camera is capturing lines all the time in
respect of the set integration time / line period
time.
