Themsen/PD4
Experiments with Python
ImageMagick
Montage:
$ montage -background '#336699' -geometry +4+4 gif2.gif gif9.gif montage.gif
Resize, Crop, Montage:
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$ mogrify -resize 100x100 030920-mushroom.jpg
$ convert mushroom100.jpg -crop 1x1 tile%04d.png
$ montage -background '#000000' -geometry +4+4 *.png montage.jpg