Comment by octoploid

Here is an image printing function for bash/zsh:

  function img { for image in "$@"; do convert -thumbnail $(tput cols) "$image" txt:- | awk -F '[)(,]' '!/^#/{gsub(/ /,"");printf"\033[48;2;"$8";"$9";"$10"m "}'; echo -e "\e[0;0m"; done ;}

Example: http://i.imgur.com/d5RzWAC.png