Rockwell Automation 5370-OCR2 PAK - Manual (Page 62)

Chapter 5
Creating and Editing Fonts
5–27
When the Test option is used, characters which correlate at or above the set
correlation percentage are shown in green. Characters that correlate at or
above 97.5% of the set correlation percentage are shown in yellow, and
characters which correlate at or above 95% of the set correlation percentage
are shown in red.
When eliminating confusion, it is best to modify the character pattern so that
no correlations with confusion characters are displayed in green, yellow or
red when the Test option is used. It is in some cases acceptable to have some
red correlations displayed, as these are usually distinguishable from valid
correlations.
If you cannot eliminate yellow correlations with confusion characters by
modifying the template, they can be eliminated by increasing the character’s
correlation percentage. This may reduce the system’s tolerance of printing
variations however.
A font used by an OCR Tool is stored in a font file. After you create a font
file, you can copy, rename or delete it using the Filer. Refer to the CVIM2
Reference Manual for more information on the filer and on file device usage.
Storage of Font Files
Normally, font files are stored on the EE: device when they are first created.
This allows for easy modification of the file, because the EE: device can be
rewritten without the need for the Recycle operation. Other storage devices
such as V2: have a larger capacity than the EE: device, so it may be desirable
to move font files to V2: after they have been created and optimized.
Moving or Renaming Font Files
If a font file is moved to a different device, or if the file name is changed,
then all OCR Tools that use the font must be modified to reflect the new file
name.
Sharing Font Files
You can configure several OCR Tools to share the same font file simply by
giving them the same Font Name. This conserves on-line memory, file
storage space, and font teaching effort. Each tool can have a different
character size, threshold, etc.
Working With Font Files