Here's a little bash shell script which overlays some text onto a resized
image:
#!/bin/sh
convert $1 -resize 101x80\> -size 101x80 xc:black +swap \
-gravity center -composite \
-fill red -stroke white -font Comic-Sans-MS-Regular \
-pointsize 16 -gravity south -annotate 0 $2 rgb:'-' | \
stream -size 101x80 rgb:'-' -storage-type char -map rgb '-' | \
./a60-lcd
Just run this with two arguments: the image and the message.
/a60-display.sh /usr/share/pixmaps/faces/penguin.jpg Meh
.. will display ... [see file '04-example.jpeg']