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Available as an Add-on for LEADTOOLS Document and Medical Imaging toolkits. |
typedef enum
{
ZONE_CHAR_FILTER_DEFAULT = 0,
ZONE_CHAR_FILTER_DIGIT,
ZONE_CHAR_FILTER_UPPERCASE,
ZONE_CHAR_FILTER_LOWERCASE,
ZONE_CHAR_FILTER_PUNCTUATION,
ZONE_CHAR_FILTER_MISCELLANEOUS,
ZONE_CHAR_FILTER_PLUS,
ZONE_CHAR_FILTER_ALL,
ZONE_CHAR_FILTER_ALPHA,
ZONE_CHAR_FILTER_NUMBERS
ZONE_CHAR_FILTER_OCRA
} CHAR_FILTER;
The CHAR_FILTER enumerated type represents the possible character set filters for a zone.
|
Value |
Meaning |
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ZONE_CHAR_FILTER_DEFAULT |
Use this value to handle the zone globally. Do not combine this with any other filter. |
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ZONE_CHAR_FILTER_DIGIT |
Recognize numerals only. E.g.: "3" (Digit Three). |
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ZONE_CHAR_FILTER_UPPERCASE |
Recognize uppercase letters only, including accented ones. E.g.: "A" (Capital A). |
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ZONE_CHAR_FILTER_LOWERCASE |
Recognize lowercase letters only including accented ones. E.g.: "a" (Lowercase a). |
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ZONE_CHAR_FILTER_PUNCTUATION |
Recognize punctuation signs only. E.g.: "!" (Exclamation Mark). |
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ZONE_CHAR_FILTER_MISCELLANEOUS |
Recognize miscellaneous characters only. E.g.: "+" (Plus sign). |
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ZONE_CHAR_FILTER_PLUS |
Enable the use of the Filter Plus characters specified by the pCHAROPTIONS structure. The Filter Plus characters are added to the language environment after any filtering. This filter can also be used to achieve a very limited character set. |
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ZONE_CHAR_FILTER_ALL |
Since all elements are enabled, there is no filtering. |
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ZONE_CHAR_FILTER_ALPHA |
Recognize upper and lowercase letters only. |
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ZONE_CHAR_FILTER_NUMBERS |
Recognize the digits, plus the Filter Plus characters set by the L_DocSetCharLangsOptions function. |
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ZONE_CHAR_FILTER_OCRA |
Recognize the OCR-A characters with digit characters. |
Comments
This enumerated type is used by the following structures:
Notes
Characters in the document that are not part of the specified Character Set will either be rejected or will be recognized as a validated character with a similar shape.
The capabilities of the selected recognition module can also impose restrictions, e.g. the ASIAN module doesn't support character filters so these filters will not work with Asian recognition module while the Asian language is enabled.
