User`s manual

Setting the Conditions for Each Object Type
3-13
3
(5) Binary processing (fixed/threshold value correction)
By setting THRESHOLD-ADJ (threshold adjustment function), the IV-S30 can cope with variations in
lighting.
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)
Setting method
Select " THRESHOLD" on the "REG COND"
screen and then change the upper and lower
limit values using the up, down, left, and right
arrow keys.
Note: In order to use the THRESHOLD-
ADJ(threshold adjustment
function), the monitor brightness
functions must be selected to
measure variations in lighting. If
you don’t select the monitor
brightness function, a LIGHT LVL
NOT SET (correcting binary value:
monitor illumination not selected)
error will occur.
Variation in lighting
Fixed
Fails to convert the image
due to a variation in lighting
Threshold correction value
Set (selection) item Details of correction
Threshold value
adjustment
Variation
difference
Variation
rate
Correct the threshold value by adding the previously specified threshold
value to the light level variation difference.
(Measured light level — reference light level) + specified threshold value
Correct the threshold value by multiplying the previously threshold value
to the light level variation rate.
(Measured light level ÷ reference light level) x specified threshold value
Threshold correction using either VAR-DIFF (enter variations in lighting as value) and
VAR-RATE (enter variations in lighting as a rate) can be selected the THRESHOLD-ADJ
(the threshold adjustment function).
REG COND SCREEN COND SAVE DETAIL
F C1 BRT
1 MEAS SHAPE RECTANGLE
2 MEAS AREA SET (224,208)~(287,271)
3 THRESHOLD SET [U.LM255 L.LM100(0~255)]
4 INVERT B/W NO
Change using the up and
down arrow keys.