HOW TO: Set Character Filters in OCR OmniPage Engine

The attached VS2010 C# Project is using LEADTOOLS version 19 with the Professional engine to show how to implement the Character Filters in an OCRZone so that the Language environment can be narrowed by specifying Character Sets. The name of each filter element indicates which category of
characters it validates.

https://www.leadtools.co...ne~characterfilters.html
https://www.leadtools.co...onecharacterfilters.html

Here are the supported character sets:

0x00000000NoneNo character filters.


0x00000001DigitRecognition of numerals only. For example: "3" (Digit Three).


0x00000002UppercaseRecognition of uppercase letters only, including accented ones. For example: "A" (Capital A).


0x00000004LowercaseRecognition of lowercase letters only including accented ones. For example: "a" (Lowercase a).


0x00000006AlphaUpper and lowercase letters only. This is a combination of (Uppercase | Lowercase).


0x00000008PunctuationRecognition of punctuation signs only. For example: "!" (Exclamation Mark).


0x00000010MiscellaneousRecognition of other miscellaneous characters only. For example: "+" (Plus sign).


0x0000001FAllAll
characters. Since all elements are enabled, there is no filtering. This
a combination of Digit (| Uppercase | Lowercase | Punctuation |
Miscellaneous).


0x00000020PlusEnables
the use of the "FilterPlus" characters. The FilterPlus characters are added after any filtering.


0x00000021NumbersDigits plus the "FilterPlus" characters This is a combination of (Digit | Plus).

Edited by user Wednesday, August 12, 2020 8:32:26 AM(UTC)  | Reason: Not specified

I have updated this project to use LEADTOOLS v20 with the OmniPage engine.

https://www.leadtools.com/help/leadtools/v20/dh/fo/ocrzone-characterfilters.html
https://www.leadtools.com/help/leadtools/v20/dh/fo/ocrzonecharacterfilters.html