4 Design and function
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CD40131 Version 1
3DPIXA
1. The master camera uses the frame trigger signal to generate the FVAL. Due to the
synchronization, the FVALs of the master camera and the slave camera are identical,
which leads to a simultaneous image start of the master camera and the slave camera.
2. The master camera uses the line trigger signal to generate the LVAL. For one LVAL one
image line is acquired in each camera. Due to synchronization, the LVALs of the master
camera and the slave camera are identical, which leads to a synchronized recording of
each image line between the master camera and the slave camera.
3. Due to the synchronized FVALs of the master camera and the slave camera, also the
image ends of the master camera and the slave camera are identical.
The frame/line trigger can be realized via I/O port of the camera or via frame grabber and
CameraLink cable using CC bits (see chapter 5.5, p. 44).
4.4
Stereo imaging
Getting height information from stereo images is based on the triangulation principle. The
same object is captured with 2 cameras providing a left and a right image (see chapter 4.2.1,
p. 21). This means that one point on the object surface has 2 corresponding image points:
one in the right and one in the left image.
Fig. 7:
Stereo imaging
