linux - Is there an image viewer that takes images on STDIN?

I'm looking for an image viewer that takes data on stdin and can be run like:

cat image.png | imageviewer

ImageMagick's display program will do just that, assuming you pipe it something that it understands.

cat image.png | display

and it'll pop up a window showing that image.

ImageMagick's display.

display < foo.png

On Linux (and likely BSDs), almost all of them – if you give /dev/stdin as the path. This includes: xloadimage, feh, Eye of GNOME (eog).

eog /dev/stdin < "$file"

(Not all of them work well with special files, though. GThumb failed the test, for example.)

A FIFO could work with eog's lack of piping support:

mkfifo ${tmpfilename};
cat ${file} > ${tmpfilename} &;
eog /dev/stdin < ${tmpfilename};
rm ${tmpfilename};

AFAIK this should work.