mkdir subsampled
for i in `seq 0 75`; do \
	j=`printf '%03d' $i`; k=`printf '%03d' $((i*2))`; \
	cp -v sceneMasks${k}.tif         subsampled/sceneMasks${j}.tif ; \
	cp -v scenePhantoms${k}.tif      subsampled/scenePhantoms${j}.tif ; \
	# for 3D datasets only \
	cp -v sceneFinalPreview${k}.tif  subsampled/sceneFinalPreview${j}.tif ; \
done
cp -v tracks.txt subsampled/tracks.txt
