Object Identification And Numbering Function (Labeling); Binary Processing (Fixed/Threshold Value Correction) - Sharp IV-S30 User Manual

(4) Object identification and numbering function (labeling)

Object identification and numbering (labeling) is a process for locating separate object and assigning
serial numbers (labels) one at a time in a binary image. By this process, multiple objects in the same
binary image can be handled separately or as a group.
Ë Ë Ë Ë Ë Measurement programs which are affected by these settings
Object counting by binary conversion, object identification by binary conversion

(5) Binary processing (fixed/threshold value correction)

By setting THRESHOLD-ADJ (threshold adjustment function), the IV-S30 can cope with variations in
lighting.
Threshold correction 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).
Set (selection) item
Threshold value
adjustment
Ë Ë Ë Ë Ë 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)
Binary
conversion
3
4
Fixed
Fails to convert the image
due to a variation in lighting
Correct the threshold value by adding the previously specified threshold
Variation
value to the light level variation difference.
difference
(Measured light level — reference light level) + specified threshold value
Correct the threshold value by multiplying the previously threshold value
Variation
to the light level variation rate.
rate
(Measured light level reference light level) x specified threshold value
3-9
Setting the Conditions for Each Object Type
1
Object
identification
(in order of
scanning)
3
Object identification
(in order of area)
2
Island
1
(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.
Details of correction
2
3
Island
4