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OCR Type A230
8.4
Setting the Process Conditions
You can use the following settings to set the process conditions for character inspection.
If you find that extraction is not going well when the inspection is performed, change
these settings and try again.
Note
Refer to the contents in Result as an aid in setting the correlation
and threshold values.
[2] CHAR. VERIF.
No. 1 Character
3.
Condition
31. Search Area
32. Positioning
33. Cor. Min.
34. Template Contrast
35. Rotation Angle
36. Delta Angle
37. Threshold
38. Filter
A:Test
B:Image
31 to 36:
These settings set the conditions for detecting (hereafter referred to as searching) the
position of a character (pattern) based on the image (hereafter referred to as the
Template Image) registered using Checker Settings.
The basic search sequence is that same as that for the Smart Matching Checker.
The search is divided into a number of steps using different compression ratios within
the template image and the search area. Initially, a fast search is performed using a
rough image (i.e. high compression ratio), then the compression ratio for the periphery
of the detected locations is gradually reduced until finally, at the last stage, the search
is performed using the original image with no compression.
37 to 38:
Sets the conditions for when the detected image and template image are overlaid and
inspected (hereafter referred to as differential processing).
Jud. :NG Det. Char.: 0
10
Fine
0.60
Good
0
0
50
No
C:Esc.
Character Verification Checker
8.4
Setting the Process Conditions
8 − 13
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