ISO/IEC 30137-4:2021

This document establishes requirements for the annotation of humans, human faces and other body parts, and arbitrary objects appearing in imagery. It specifies the following:
—    metadata to be inserted in a video stream;
—    encoding of full and partial spatial and temporal ground truth information for:
—    objects present in a video, and
—    objects absent in a video;
—    procedures for different annotation of known and unknown subjects.
This document does not specify:
—    encoding of video data.