[jira] [Created] (NIFI-1815) Tesseract OCR Processor

["Jeremy Dyer (JIRA)" <ji...@apache.org>]

Jeremy Dyer created NIFI-1815:
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             Summary: Tesseract OCR Processor
                 Key: NIFI-1815
                 URL: https://issues.apache.org/jira/browse/NIFI-1815
             Project: Apache NiFi
          Issue Type: Improvement
            Reporter: Jeremy Dyer
            Assignee: Jeremy Dyer


This ticket is a follow-up to NIFI-1718 minus the use of the Tika library

Expose OCR capabilities through a new processor which uses the Tesseract library. Use of this processor would require that Tesseract be installed on the NiFi host. Since the processor will have a system dependency care must be taken to ensure that the overall NiFi cluster continues to function properly in the absence of the Tesseract system dependency even though the OCR processor itself will be unable to perform its duties. In the event that the system dependencies are not detected the processor should display a validation warning rather than failing or preventing the NiFi instance from booting properly.

Properties expose to configure Tesseract
tesseractPath - Path to tesseract installation folder, if not on system path.
language - Language ID (e.g. "eng"); language dictionary to be used.
pageSegMode - Tesseract page segmentation mode, defaults to 1.
minFileSizeToOcr - Minimum file size to submit file to OCR, defaults to 0.
maxFileSizeToOcr - Maximum file size to submit file to OCR, defaults to Integer.MAX_VALUE.
timeout - Maximum time (in seconds) to wait for the OCR process termination; defaults to 120.




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