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Slap Fingerprint Segmentation Evaluation III

Test Results | Mailing List | Test Plan and API 


Slap Fingerprint Segmentation Evaluation (SlapSeg) III is a public test of automated slap fingerprint segmentation algorithms. Fingerprint segmentation is the act of separating or segmenting an image of the friction ridge structure of the hand into individual images of the upper-most finger joints, known as distal phalanges. In SlapSeg III, output from automated algorithms is compared to output from a human examiner and analyzed for similarity.


  1. Fill out the request for the dataset agreement to receive the validation dataset.
  2. Sign, slapseg [at] (e-mail a scanned copy), and postal mail the original signed evaluation agreement to NIST. If provided, please include the delivery tracking numbers when e-mailing your scanned agreement. Both an e-mail scanned copy and physical hard copy are required.
  3. Wrap your algorithm in the SlapSeg III application programming interface (API), and build it as a shared library.
  4. Follow the instructions in validation to ensure the output of your algorithm meets NIST's testing requirements.
  5. E-mail the signed and encrypted output of validation to the slapseg [at] (SlapSeg III team).


SlapSeg III is the latest in a long history of slap fingerprint segmentation evaluations conducted by the NIST Image Group. Prior evaluations include SlapSeg II (2008–2018) and SlapSeg 04 (2004–2005). These evaluations produced a number of relevant documents:


Created July 20, 2018, Updated September 30, 2021