One week series. Slicing images from top to bottom over time.

sliceProgressively.sh

#!/bin/bash
# One week series. Slicing images from top to bottom over time.
# http://cameronbrowning.com/content/one-week-series/ 
# Originally adapted from earlier work at:
# http://cameronbrowning.com/content/creating-slit-scan-images-from-quicktime-movies-with-ffmpeg-on-mac-os-x/

# Step 1: loop through 10,078 images
for i in `seq -f "%05g" 1 10078`;
do
	# subtract 1 from the counter for the y offset
	# mycmd=$(printf "mogrify -crop 352x1+0+%d image-%04d.jpg\n" `expr "$i" - "1"` $i)
	whichfile=$(printf "$i.jpg")

	myvar=$(expr "$i"  \* "240" / "10078") 
	
	# output the command that's about to be executed
	# so you can see progress
	mycmd="mogrify -crop 352x1+0+$myvar $whichfile"
	echo $mycmd
	# then execute it.
	$mycmd

done
# after this execute this to generate the tall scan:
# montage *.jpg -tile 1x -mode concatenate tallscan.png

# then lets slice the tall scan into 7 chunks
# (by omitting the offset in the crop param, it auto slices)
# convert tallscan.png -crop 352x1440 tallslice.png

# now stick them together
# montage tallslice-*.png -tile x1 -mode concatenate tallslice_combined.png