DOC2_CHAR_FILTER

typedef enum 
{ 
   DOC2_ZONE_CHAR_FILTER_DEFAULT = 0x0000, 
   DOC2_ZONE_CHAR_FILTER_DIGIT = 0x0001, 
   DOC2_ZONE_CHAR_FILTER_UPPERCASE = 0x0002, 
   DOC2_ZONE_CHAR_FILTER_LOWERCASE = 0x0004, 
   DOC2_ZONE_CHAR_FILTER_PUNCTUATION = 0x0008, 
   DOC2_ZONE_CHAR_FILTER_MISCELLANEOUS = 0x0010, 
   DOC2_ZONE_CHAR_FILTER_PLUS = 0x0020, 
   DOC2_ZONE_CHAR_FILTER_ALL = 0x0040, 
   DOC2_ZONE_CHAR_FILTER_ALPHA = 0x0080, 
   DOC2_ZONE_CHAR_FILTER_NUMBERS = 0x0100, 
   DOC2_ZONE_CHAR_FILTER_OCRA = 0x0200, 
   DOC2_ZONE_CHAR_FILTER_USER_DICTIONARY = 0x0400, 
} DOC2_CHAR_FILTER; 

The DOC2_CHAR_FILTER enumerated type represents the possible character set filters for a zone.

Value Meaning
DOC2_ZONE_CHAR_FILTER_DEFAULT Have the zone handled globally. Do not combine this with any other filter.
DOC2_ZONE_CHAR_FILTER_DIGIT Recognize numerals only. Example: "3" (Digit Three).Note: Be sure to use this value whenever you are using the OmniPage engine to recognize ICR numeric characters. Other values are not recommended for this situation.
DOC2_ZONE_CHAR_FILTER_UPPERCASE Recognize only uppercase letters, including accented ones. Example: "A" (Capital A).
DOC2_ZONE_CHAR_FILTER_LOWERCASE Recognize only lowercase letters, including accented ones. Example: "a" (Lowercase a).
DOC2_ZONE_CHAR_FILTER_PUNCTUATION Recognize only punctuation signs. Example.: "!" (Exclamation Mark).
DOC2_ZONE_CHAR_FILTER_MISCELLANEOUS Recognize only miscellaneous characters. Example: "+" (Plus sign).
DOC2_ZONE_CHAR_FILTER_PLUS Enable the use of the Filter Plus characters specified by the pCHAROPTIONS2 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.
DOC2_ZONE_CHAR_FILTER_ALL Enable all elements ( no filtering).
DOC2_ZONE_CHAR_FILTER_ALPHA Recognize only upper and lowercase letters.
DOC2_ZONE_CHAR_FILTER_NUMBERS Recognize digits, plus the Filter Plus characters set by the L_Doc2SetCharLangsOptions function.
DOC2_ZONE_CHAR_FILTER_OCRA Recognize the OCR-A characters with digit characters.
DOC2_ZONE_CHAR_FILTER_USER_DICTIONARY Recognize characters from the user dictionary section assigned to the zone.
✎ NOTE
User words and dictionaries are no longer supported in the LEADTOOLS OCR Module - OmniPage Engine.

Comments

The enumeration is used by:

✎ NOTE

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 does not support character filters so these filters will not work with Asian recognition module while the Asian language is enabled.

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