Is there nothing standardized besides just raw images?
E.g. www.nist.gov/system/files/documents/2021/02/25/ansi-nist_2007_griffin-face-std-m1.pdf from 2005 by NIST says:so comparing it to fingerprint file formats such as ISO 19794-2. Sad!
Specify face images because there is no agreement on a standard face recognition template - Unlike finger minutiae ...