jhmdb_OF.sh

#!/usr/bin/env sh

DATABASE_ROOT=/path/to/dataset/root
OUT=/path/to/OF/output
MATLAB_OF_DIR=/path/to/compute_OF/function
MATLAB_OUT_FILE=/path/to/matlab/output/file

if [ -d $OUT/flow_dir ]; then
	echo "You alreay have flow_dir in $OUT"
	echo "Remove it first if you want to recompute OF."
	exit 1
fi

if [ -f $MATLAB_OUT_FILE/flow.m ]; then
	rm $MATLAB_OUT_FILE/flow.m
fi

mkdir $OUT/flow_dir
touch $MATLAB_OUT_FILE/flow.m

echo "addpath '/home/ebadawy/actiontubes/'" >> "$MATLAB_OUT_FILE/flow.m"

selected_actions=('jump' 'climb_stairs' 'run' 'shoot_gun' 'throw');

for action in $(ls $DATABASE_ROOT)
do
	if ! [[ " ${selected_actions[@]} " =~ " ${action} " ]]; then
		continue
	fi

	mkdir $OUT/flow_dir/$action

	for video in $(ls $DATABASE_ROOT/$action)
	do
		mkdir $OUT/flow_dir/$action/$video
		prev="$DATABASE_ROOT/$action/$video/$(ls $DATABASE_ROOT/$action/$video | sort -n | head -1)"
		for frame in $(ls $DATABASE_ROOT/$action/$video)
		do
			nxt="$DATABASE_ROOT/$action/$video/$frame"
			
			if [ $prev == $nxt ]; then
				continue
			fi

			CMD="imwrite(compute_OF(imread('$prev'),imread('$nxt')),'$OUT/flow_dir/$action/$video/$frame');"
			echo $CMD >> "$MATLAB_OUT_FILE/flow.m"
			prev=$nxt
		done
	done
done