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5 Functionality
5.3 Reduction of Image Size
5.3.1 Region of Interest (ROI) (2Donly mode)
This section describes the ROI features in the 2Donly mode where the camera behaves as a
standard area scan camera.
The maximal frame rate of the 2Donly mode is considerably lower than in the
3Donly mode.
Some applications do not need full image resolution. By reducing the image size to a certain
region of interest (ROI), the frame rate can be drastically increased. A region of interest can be
almost any rectangular window and is specified by its position within the full frame and its
width and height. Table 5.2 shows some numerical examples of how the frame rate can be
increased by reducing the ROI.
The ROI is determined by the following properties: OffsetX, Width, OffsetY, Height
Only reductions in height result in a higher frame rate.
Table 5.2: Frame rates of different ROI settings in 2Donly mode (minimal exposure time) (Footnotes:
D2048-3D04 models only)
5.3.2 Region of Interest (ROI) in 3D modes
The ROI definition in the 3Donly and 2D&3D modes is tailored to laser line detection.
The ROI is determined by the following properties: OffsetX, Width, Peak0_2DY, Peak0_3DY,
Peak0_3DH and additionally if PeakDetector_NrOfPeaks=2, Peak1_2DY, Peak1_3DY and
Peak1_3DH.
There is a high speed mode that provides higher scanning speed at the cost of reduced data
accuracy (not available in all revisions, see Appendix B).
For every peak (laser line) there are two areas (see Fig. 5.12):
One row with 2D data from the image sensor (Peak<n>_2DY) and one area for the detection of
the laser line <n> (n= 1 or 2) defined by the parameters Peak<n>_3DY, Peak<n>_3DH. These
values can be freely set within the following limits:
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ROI Dimension
1)
2048 x 2048
2048 x 1088
1280 x 1024 (SXGA)
1280 x 768 (WXGA)
800 x 600 (SVGA)
640 x 480 (VGA)
2048 x 256
MV1-D2048-3D03/04
22 fps
42 fps
45 fps
60 fps
77 fps
96 fps
178 fps
1)
MV1-
MAN052 12/2018 V3.2
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