User`s manual

Setting the Conditions for Each Object Type
3-11
3
(2) Threshold value setting
The IV-S30 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
REGIST" 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
BGA/CSP inspection, 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