Omron V440-F, Руководство пользователя

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4-7
4 Setup
V440-F C-Mount Code Reader User Manual
4-2 T
rain
usin
g
A
u
to
calib
ra
tion
4
4-
2-6 Auto
calib
ration The
ory
1
During Autocalibration, the system methodically cycles combinations of
Exposure
,
Gain
,
Morphology
, and
Pixel Binning
. For each combination, the system takes
5
pictures and then
makes the following measurements, which it combines into an overall score for that attempt.
Signal Strength
is defined as how many times the supplied image was
decoded successfully
with a frequency of
5Hz
, or every
5
images.
Interference
is defined as any interference that will cause the X-Mode
object search
algorithm
to have a high deviation between inspections.
Noise
is defined as any interference that will cause the X-Mode 1D or 2D
detection algorithm
to have high deviation between inspections.
Propagation Disturbance
is defined as any disturbance or noise in the image that will cause
the
overall inspection time
to have a high deviation between inspections. This disturbance can
be caused by:
•
Background environment;
•
Glare from the lighting;
•
Reflections from the object on which the symbol is located;
•
Anything that causes the
Interference
and
Noise
parameters to have a high deviation.
2
Scores for each measurement are based on this table:
•
The overall score for the parameter set is calculated as a
weighted sum
of all the individual
measurements:
4-2-6 Autocalibration Theory