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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