Chapter
4
Reference Manual
IVC-2D
90
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Edge
Figure – Edge finding with evaluation type Absolute, which detects an absolute change of
gray values.
Input Parameters
01 = Source bank
Image bank containing the image to be proc-
essed.
02 = Type
Selected type of threshold and transition type:
Bright -> dark
Relative threshold and only transitions from
bright to dark pixels will be detected.
Dark –> bright
Relative threshold and only transitions from
dark to bright pixels will be detected.
Any relative transition
Relative threshold and any transition will be
detected
Absolute
Absolute threshold and any transitions above
or below the two thresholds will be detected.
03 = Start point X
X coordinate for start point of line.
04 = Start point Y
Y coordinate for start point of line.
05 = End point X
X coordinate for end point of line.
06 = End point Y
Y coordinate for end point of line.
07 = Gray low
Lower gray value threshold.
Using any evaluation type with relative thresh-
old this value is the required changes in gray
values.
08 = Gray high
Upper gray value threshold.
Available only with evaluation type absolute
threshold.
Note that this value will be ignored when using
evaluation type relative threshold.
1
2
Scan interval
:
Distance of pixels that
will be compared.
Min width
:
Number of consecutive pixels
with values that must be in-
between selected thresholds
Average pixels
:
Value 2 means gray values
will be averaged out
of two pixels.
