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Sixel is a graphic format for old Dec VT340 terminals,
Which allows you to display images directly in terminals.

More Information

Library README (see GitHub install below)
  https://saitoha.github.io/libsixel
Sixel Experiments
  https://codeberg.org/coffee/sixel-experiments
All About SIXELs  (plain text from 1990)
  https://www.digiater.nl/openvms/decus/vax90b1/krypton-nasa/all-about-sixels.text

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Sixel is built into XTerms,  but to fully enable it you need to start the
xterms with a couple of extra resources to enable 256 colors.

  xterm -xrm "XTerm*decTerminalID: vt340" -xrm "XTerm*numColorRegisters: 256"

Also in "mlterm" but I have not tried this.

These resources do not interfere with other xterm functions so can be globally
enabled in X11 Application Resource files.

Using ImageMagick (built-in driver)...

  convert logo: sixel:- ; echo ''

Using LibSixel Library...
A github libsixel library..
  https://github.com/saitoha/libsixel

Personal Installation (default is into "/usr/local")

  Install image conversion library
    cd tmp
    git clone https://github.com/saitoha/libsixel.git
    cd libsixel
    configure --prefix=$HOME/.local
    make all install
    cd ..; rm -rf libsixel

Running
      img2sixel ~/info/graphics/sixel_snake.jpg ; echo ''

A Package for fedora 33 is in COPR, but only for that version of fedora!

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