2-3-(3)
Changing Filtering
Section 2-3
2-3-2
Filtering
The image read by the Camera can be manipulated to create an image that is
easier to measure by using the 9 filtering methods: Weak smoothing, strong
smoothing, dilation, erosion, median, edge enhancement, vertical edge extrac-
tion, horizontal edge extraction, and edge extraction. The settings can be
made separately for Image 0 and Image 1.
The cursor can be moved on the image to see the effects of filtering. Select fil-
tering while confirming the results on the image.
CHECK
The strength of the filtering can be selected if Frame/Field is set to Frame.
1.
Select Filtering.
The settings screen for filtering will be displayed.
Filtering
Target
Function
Example
application
OFF
---
---
---
Weak
smoothing
Measurement objects
with slight surface irregu-
larity
Reduces the irregularity
through smoothing.
Select either weak or
strong smoothing.
Stable searches
Strong
smoothing
Dilation
White measurement
objects with black noise
Increases white to elim-
inate black noise.
Removal of noise
from measure-
ment objects
Erosion
Black measurement
objects with white noise
Reduces white to elimi-
nate the white noise.
Removal of noise
from measure-
ment objects
Median
Measurement objects
with slight surface irregu-
larity
Reduces surface irreg-
ularities while maintain-
ing the contour.
Edge positioning
(with no reduction
in accuracy)
Edge
enhance-
ment
Blurred measurement
objects (e.g., due to light-
ing changes)
Enhances edges
between bright and
dark regions.
Edge positioning
Vertical
edge
extraction
Measurement objects dif-
ficult to extract due to bad
image contrast
Extracts the vertical
edges (light and dark)
of an image.
Defect inspection
(using binary pro-
cessing)
Horizontal
edge
extraction
Measurement objects dif-
ficult to extract due to bad
image contrast
Extracts the horizontal
edges (light and dark)
of an image.
Defect inspection
(using binary pro-
cessing)
Edge
extraction
Measurement objects dif-
ficult to extract due to bad
image contrast
Extracts the vertical
edges (light and dark)
of an image.
Defect inspection
(using binary pro-
cessing)
Weak
Strong
3
×
3
5
×
5
+ The image changes each time these keys are pressed.
SHIFT
ENT
3.Change Filtering
Filtering order(Image0)
Filtering(Image0)
BGS levels(Image0)
Filtering order(Image1)
Filtering(Image1)
BGS levels(Image1)
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