Omron F250-UME Software Manual page 321

Density Defects
CHECK
STEP 3: Registering Reference Values
CHECK
Example
Edge detection point
Measurement
region
Noise width (pixel)
50%
Offset Width
Set the adjustment width (in pixel units) for the detected edge position. Set a
value between -511 and 511.
The default setting is 0, which means measurement will start from position
where the edge is detected.
Left and right edges: Set the offset width on the X axis.
Upper and lower edges: Set the offset width on the Y axis.
Example: To Measure from 2 Pixel-widths Inside the Edge Detection Point
The value inside the brackets is the offset width.
Left edge (2)
The display cursor, which indicates the edge detection point, will also appear
at the set offset width position.
Position detection can also be performed using algorithms for detecting
defects. Register the reference values when performing position detection.
The following reference values must be registered:
The X and Y coordinates of the position found as the large defect
The X and Y coordinates of the position found as the small defect
Reference values for 2 positions can be registered, regardless of the settings
for large and small defect inspections under Measurement conditions.
If the density falls below the
edge level within the set range,
the detected edge is
determined to be noise.
Edge level
Offset width
Edge detection point
X axis
−
Y axis
+
Upper edge (2)
Lower edge (-2)
Section 2-14
+
Measurement region
Right edge (-2)
2-14-(23)