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Vision Sensor SBSI/SBSC-EN, 8062650 - 1607b - 13/09/2016
Vision Sensor Manual
Optimisation
Execution speed:
Search zone for position (yellow frame) only as large as required
Reduce search stripes
Reduce smoothing value
Reduce resolution to QQVGA, QVGA or VGA instead of WVGA (Attention: global parameter, affects
all detectors!)
Robust detection:
If edges blurred: increase smoothing value
Interfering edges such as scratches are detected: increase switching threshold or / and smoothing value
Edge not vertical to search direction: increase search stripes
Effect of „Number search stripes”
Number search stripes represents in how many search stripes the width of the search area is divided.
Edge detection is processed in each search stripe over the whole width. The first edge which is detected
of all search stripes is the overall result of all search stripes. By increasing the number of search stripes
it´s assured that the first edge is found in the whole search area.
By increasing search stripes it may happen, that the found edge strength fluctuates. E.g. if only the half
width of the search area is covered with an edge. The cause is that the first – not the strongest – edge is
detected which is above the threshold.
Further informations to edge detection see chapter:
Further explanations to Edge detector (alignment)
Fig. 71: Alignment, Edge detection
4.6.2.4 Alignment Contour detection
This alignment detector is ideal for the detection of contours with edges at any angle.
4.6.2.4.1 Color channel
Selection of color model and color components for the grey image used by the detector.
The display of the image depends on the image chip and the selected detector.
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