olemus
(1) portreemaali, -joonise või -fotona
= a painted or photo portrait
https://duckduckgo.com/?q=%22portrait%22&t=h_&iar=images&iax=images&ia=images

(2) ISO/IEC 19794, ISO/IEC TR 29794 jm:
elektroonilisel kujutisel põhinev isiku portree esitus
= electronic image-based representation of the portrait of a person

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

standardid
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

vt ka
- näokujutise tüüp
- näotuvastus