Omron FQ2-S Series User Manual page 179

Note
Edge Level
• When measuring by relative value (%) of color difference width
An edge is detected in the following way.
1. The color change distribution of the entire measurement region is determined.
2. The minimum color change is 0%. The maximum color change is 100%.
3. The location where the color change intersects with the edge level is detected as the edge.
Measurement
region
• When measuring by color difference value
The edge threshold is set using the absolute value of the color difference.
Measurement region
Noise
50
0
Noise Is Mistaken as an Edge
−
[Inspect] [Inspection]
[Noise Level]
Parameter Setting
Noise level Sensors with Color Cam-
eras Only
Range: 0 to 442
Default: 5
(Sensors with Mono-
chrome Cameras only)
Range: 0 to 255
Default: 5
FQ2-S/CH User's Manual
100%
50%
0%
Edge threshold (absolute value)
− −
[Edge Position] [Modify]
Description
Sets the density level to be considered as noise.
If the difference between the maximum and minimum color changes in the
region is below the noise level, it will be assumed that there is no edge.
Increase this value if noise is incorrectly detected as an edge.
Important
If you change the noise level, perform teaching again.
Inspecting with the Edge Position Inspection Item
Maximum color change
Edge level
Minimum color change
−
[Details] Tab Page
− −
[Meas. Parameter]
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