Sharp IV-S30J User Manual page 57

Setting Measurement Conditions
(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.
3
(Captured image)
Binary conversion
(upper limit A, lower limit B)
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)
Threshold valve B
Binary conversion
(upper limit 255, lower limit A)
Threshold valve A
Binary conversion
(upper limit 255, lower limit B)
(Threshold value)
255
Upper
limit A
Lower
limit B
0
3-10
Black
White
Black
- Binary area condition (binary image mask) menu of
the binary area measurement
THRESHOLD VAL AUTO-REG RESET
1U.LM
255(0~255)
2L.LM
100(0~255)
SET=CHNG ESC=BACK SEL=CHNG IMG TRG=FUNC
(Threshold value)
255
Lower White
limit A
Black
B
0
(Threshold value)
255
A
White
Lower
limit B
Black
0
F C1 DRK
L LIMIT ONLY
U&L LIMITS