Inspecting with the Edge Position Inspection Item
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FQ2-S4 User’s Manual
Reflect in Total Judgement
You can specify whether to reflect the judgement results of an inspection item in the overall judgement. (The
default is to reflect them.)
[Inspect] − [Inspection] − [Add item.] − [Edge Position] − [Details] Tab Page − [Output
parameter]
Changing Edge Detection Conditions (Sensors with Monochrome Cameras Only)
You can change the following measurement conditions for Sensors with Monochrome Cameras.
[Inspect] − [Inspection] − [Edge Position] − [Modify] − [Details] Tab Page − [Meas. Parameter]
Unstable Edge Position Results
There Is an Edge But It Cannot Be Detected
[Inspect] − [Inspection] − [Edge Position] − [Modify] − [Details] Tab Page − [Meas. Parameter] −
[Edge Level]
Item Parameter Description
Density change Light to Dark Detects as an edge any position within the specified region that changes from
white to black.
Dark to Light Detects as an edge any position within the specified region that changes from
black to white.
Measurement methods Projection A projection is formed based on the gray level, and any position of intersection
between the gray level value and the threshold (edge level) is detected as an
edge.
This detection method is used when you must process an image with exces-
sive noise or when the edges are blurry.
Differentiation A differentiated waveform is created that represents the amount of change in
gray level between neighboring pixels. The maximum value of the differenti-
ated waveform that exceeds the threshold (edge level) is detected as an edge.
This detection method is used for low-contrast images.
Parameter Setting Description
Edge level Range: 0 to 100
Default: 50
Set the color change level to detect as an edge.
The edge point is found based on a threshold that is set for a color change.
If you change the edge level, perform teaching again.
Edge Level
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.
Important
Note
100%
50%
0%
Minimum color change
Edge level
Measurement
region
Maximum color change
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