image processing - How to crop a large jpeg into smaller tile jpegs? -

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for example, have big.jpg 600 (w) x 300 (h), crop 250 x 250 each. such big.jpg becomes 6 tile jpegs:

tile_0_0.jpg (250 x 250) tile_0_1.jpg (250 x 250) tile_0_2.jpg (100 x 250) tile_1_0.jpg (250 x 50) tile_1_1.jpg (250 x 50) tile_1_2.jpg (100 x 50)

any tool (command line or gui) recommended? thanks!

http://www.imagemagick.org/usage/crop/#crop_tile


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