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RekognitionCompareFaces

Apache NiFi processor for calling Amazon's "Compare Faces" Rekognition service.

Installation

  1. Download complied NAR into NiFi's /lib/ directory.
  2. Change permissions on the file (>chmod 755 nifi-rekognitioncomparefaces-nar-1.0-SNAPSHOT.nar)
  3. Restart NiFi (/bin/nifi.sh restart)

Configuration

Property Configuration

After NiFi restarts and you've added the processor to your canvas ...

  1. Add your S3 credentials, just as you would with NiFi's FetchS3Object processor.
  2. Define Source and Target image sources:
  • S3Object <> S3Object
  • S3Object <> Base64-encoded string
  • Base64-encoded string <> S3Object
  • Base64-encoded string <> Base64-encoded string

Notes

This processor was developed for a limited, go / no-go use-case. Currently, the processor simply checks whether the length of the FaceMatches response array is non-zero. If if is, then the FlowFile is routed to the Match relationship. If no faces are found (throwing an InvalidParameters exception) or the FaceMatches array is empty, the FlowFile is routed to the No Match relationship.

To make the processor more general-purpose (merge requests welcome! please update the compiled NAR), a successful response could be JSONified and set as an attribute. Thereafter, the NiFi expression language (vs. the processor itself) could be employed for follow-on FlowFile routing.