I was a little hoping you were going to hand deliver the film to a CVS and have it printed AND THEN scan it :)
As for imagemagick, you could make this harder by:
a) Parsing the PNG structure of every image (4-byte length, 4-byte type, data, and 4-byte CRC).
b) Decompress and unfilter the pixel data
c) Convert data to indexed color and quantize down to <= 256 colors if needed
d) Write the GIF container
e) LZW-encode the pixel indices
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[ 0.15 ms ] story [ 20.9 ms ] threadman what a cop out, I was hoping they would use a text editor to build the gif. that would be way harder.
But scanning, cropping using one of the latest image editors, then running it through imagemagick does not feel like the hardest way to make a gif.
As for imagemagick, you could make this harder by: a) Parsing the PNG structure of every image (4-byte length, 4-byte type, data, and 4-byte CRC). b) Decompress and unfilter the pixel data c) Convert data to indexed color and quantize down to <= 256 colors if needed d) Write the GIF container e) LZW-encode the pixel indices