ASF GitHub Bot commented on NIFI-1815:

Github user trixpan commented on the issue:

    @olegz @jdye64 is this PR still active / plan to review?

> 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
>         Attachments: 0006-changes-to-the-OCR-processor.patch, 
> nifi_1815_1.x_patch.zip
> 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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