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https://issues.apache.org/jira/browse/TIKA-93?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14012011#comment-14012011
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Luis Filipe Nassif commented on TIKA-93:
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Hi [~tpalsulich],
If you want to try the TesseractOCRParser.patch, you can simply install
Tesseract. I implemented the OCRParser interface created by [~gsingers] in
TIKA-93.patch, but it is not mandatory. You can skip the TIKA-93.patch simply
changing the TesseractOCRParser class to extend AbstractParser instead of
implementing OCRParser. To enable the new parser, you must list it in
tika-parsers/src/main/resources/META-INF/services/org.apache.tika.parser.Parser
and set a TesseractOCRConfig in the parseContext:
{code}
TesseractOCRConfig config = new TesseractOCRConfig();
//Needed if tesseract is not on system PATH
config.setTesseractPath(tesseractFolder);
parseContext.set(TesseractOCRConfig.class, config);
{code}
So it will be enabled and automatically run on images, including embedded ones.
> OCR support
> -----------
>
> Key: TIKA-93
> URL: https://issues.apache.org/jira/browse/TIKA-93
> Project: Tika
> Issue Type: New Feature
> Components: parser
> Reporter: Jukka Zitting
> Assignee: Chris A. Mattmann
> Priority: Minor
> Fix For: 1.6
>
> Attachments: TIKA-93.patch, TIKA-93.patch, TIKA-93.patch,
> TIKA-93.patch, TesseractOCRParser.patch, TesseractOCRParser.patch,
> testOCR.docx, testOCR.pdf, testOCR.pptx
>
>
> I don't know of any decent open source pure Java OCR libraries, but there are
> command line OCR tools like Tesseract
> (http://code.google.com/p/tesseract-ocr/) that could be invoked by Tika to
> extract text content (where available) from image files.
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