Image processing
4.2 Code verification
SIMATIC MV420 / SIMATIC MV440
Operating Instructions, 04/2013, A5E02371045-06
65
Recommended module widths for verification of 1D codes
●
Minimum module width: 4 pixels
●
Recommended module width: 5 pixels
●
Maximum module width: 20 pixels
Camera resolution
Min. module width
Max. module width
640 x 480 pixels
(SIMATIC MV440 SR)
5 mil
1024 x 768 pixels
(SIMATIC MV440 HR)
4 mil
1600 x 1200 pixels
(SIMATIC MV440 UR)
3 mil
Calibration code takes up
approximately half the image
height.
Target size: Min. 5 pixels/module
Depends on code type,
number of coded characters
4.2.7
Formatted output of the verification
One important feature of a verifier is the ability to document results. To allow this, the reader
provides verification reports that can be accessed over the various interfaces.
If a verification report has been configured, this is generated and output each time a read
was successful.
A verification report consists of two parts:
●
The verification settings,
●
The verification result.
Verification settings
With %v (lower-case "v"), you obtain an output of the all the settings relevant for verification
in the printed order.
All field values are separated by semicolons. The field names are not part of the report.
Field name
Value
Exposure time
0000 ... 9999
Brightness
0000 ... 0999
Brightness offset (coarse)
-255 ... 0255
Brightness offset (fine)
-255 ... 0255
Histogram peak low
0000 ... 0255
Histogram peak high
0000 ... 0255
Cell scaling * 100
0000 ... 9999
Target contrast
0000 ... 0100
Summary of Contents for SIMATIC MV420
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