This is a call for development for a pattern recognition program to detect and track people by their tattoos.
NIST's Summary of it is:
The Tattoo Recognition Technology – Challenge (Tatt-C) is being conducted to challenge the commercial and academic community in advancing research and development into automated image-based tattoo matching technology.Some background on this from the NIST page:
Tattoos have been used for many years to assist law enforcement in the identification of criminals and victims and for investigative research purposes.* Historically, law enforcement agencies have followed the ANSI-NIST-ITL 1-2011 standard to collect and assign keyword labels to tattoos. This keyword labeling approach comes with drawbacks, which include the limitation of ANSI-NIST standard class labels to describe the increasing variety of new tattoo designs, the need for multiple keywords to sufficiently describe some tattoos, and subjectivity in human annotation as the same tattoo can be labeled differently between examiners. As such, the shortcomings of keyword-based tattoo image retrieval have driven the need for automated image-based tattoo recognition capabilities.IOW, You is out of luck if you've got tatts since the guvment may soon be able to track your movements.