More than two, e.g. there’s also the Inline Images Protocol supported by iTerm2 and WezTerm.
Kovid documented his rationale at some length here: https://github.com/kovidgoyal/kitty/issues/33
FWIW The definitive thread on "images in terminals" is probably found in these threads:
https://gitlab.freedesktop.org/terminal-wg/specifications/-/...
there's lengthy discussion from just about everyone at this point in those threads, about why images in terminals is Hard
FWIW The definitive thread on "images in terminals" is probably found in these threads:
https://gitlab.freedesktop.org/terminal-wg/specifications/-/...
https://gitlab.freedesktop.org/terminal-wg/specifications/-/...
there's lengthy discussion from just about everyone at this point in those threads, about why images in terminals is Hard