append images using a grid

Question

convert +append ...

appends images horizontally.

convert -append ...

appends images vertically.

Imagine i have a set of N images and i want to create to append the images following a grid of N/2 lines and 2 columns. How can i do that?

The best will be a direct method, but if it involves temporary images, it's ok for me

Answer 1

Use the ImageMagick "montage" command, specifically the "-tile" option. See http://www.imagemagick.org/Usage/montage/ for details.