Setting Measurement Conditions
3-8
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.
Ë
Ë
Ë
Ë
Ë
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)
(3) Setting window boundaries (enable/disable)
This function enables and disables the labeling (object identification) of binary images located that
cross over the window frame boundary.
Ë
Ë
Ë
Ë
Ë
Measurement programs which are affected by these settings
BGA/CSP inspection, object counting by binary conversion, object identification by binary
conversion
(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
Binary
conversion
Labeling
(enable
window
boundaries)
Window
1
2
3
4
1
2
Labeling
(disable window
boundary)
Condition: Labeling
(in order they are
connected)
Images 1 and 3 cross over the
window frame edges and are
measured together with the
areas outside the window frame
edges.
1
MEAS SHAPE
2
MEAS AREA
3
AUTO REGIST
4
THRESHOLD
RECTANGLE CIRCLE ELLIPSE
MOVE UP.L(224.208) LO.R(287.271)
EXEC(L LIMIT ONLY U&L LIMITS)
U.LM255 L.LM100(0~255)
Automatic setting