olemus
(1) oseses tähenduses: portreena, fotona

https://readid.com/blog/face-images-in-ePassports

(2) ISO/IEC 19794, ISO/IEC TR 29794 jm:
elektroonilisel kujutisel põhinev isiku portree esitus

http://www.wjscheirer.com/talks/fg-tutorial-2011_1.pdf

http://egovstandards.gov.in/sites/default/files/Face_Image_Data_Standard_Ver1.0.pdf

https://www.wjscheirer.com/papers/wjs_hrb2009_longrange.pdf

http://sibgrapi.sid.inpe.br/archive.cgi/sid.inpe.br/sibgrapi/2016/07.22.13.57

standardid
https://www.nist.gov/system/files/documents/2016/12/12/griffin-face-std-m1.pdf

https://www.iso.org/obp/ui/#iso:std:iso-iec:19794:-5:ed-2:v1:en

http://egovstandards.gov.in/sites/default/files/Face_Image_Data_Standard_Ver1.0.pdf

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