User`s manual

Setting Measurement Conditions
3-10
3
(2) Threshold value setting
The IV-S30J treats the "areas darker than the lower limit value" or "brighter than the upper limit value"
as "black." It treats that the areas between the upper limit value and lower limit value as "white."
However, if the white-black reverse function is enabled, conversion to white/black will be reversed.
Normally, if you want to use only one threshold value for binary conversion, set the upper limit value to
"255." Then you only need to adjust the lower limit value to a threshold value that works for our
application.
Setting the threshold value automatically
The binary threshold value can be set
automatically.
In the binary area condition of each
measurement program, execute the "AUTO
REG" function (lower limit only or upper and
lower limits) and the optimum threshold values
will be set in each measurement area
automatically.
The binary area conditions (binary image
mask) menu in the binary area
measurement.
Measurement programs which are affected
by these settings
Area measurement by binary conversion,
object counting by binary conversion, object
identification by binary conversion, point
measurement (binary images)
(Captured image)
Threshold valve B
Threshold valve A
Binary conversion
(upper limit 255, lower limit A)
Binary conversion
(upper limit 255, lower limit B)
Binary conversion
(upper limit A, lower limit B)
255
(Threshold value)
Lower
limit A
B
0
Black
White
255
(Threshold value)
Upper
limit A
Lower
limit B
0
Black
Black
White
255
(Threshold value)
A
Lower
limit B
0
Black
White
SET=CHNG ESC=BACK SEL=CHNG IMG TRG=FUNC
THRESHOLD VAL AUTO-REG RESET
F C1 DRK
1 U.LM 255(0~255)
2 L.LM 100(0~255)
L LIMIT ONLY
U&L LIMITS
- Binary area condition (binary image mask) menu of
the binary area measurement