Bibliothèque de traitements d'images en virgule flottante. http://la.buvette.org/photos/cumul/
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#!/bin/bash
###############################
# ECHOMIX #
###############################
SRCDIR="Fist"
DSTDIR="Pong"
FTMP="/dev/shm/tmp.fimg"
FDST="/dev/shm/foo.fimg"
# ------------------------------------------------------------
# count the nomber of picz in the source directory
#
NBRE=$(ls -1 ${SRCDIR}/*.fimg | wc -l)
# compute the echo picz offset
#
OFFS=$(( NBRE / 4 ))
# ------------------------------------------------------------
# MAIN LOOP
for idx in $(seq 0 $NBRE)
do
# build the two input filenames ...
#
imgA=$(printf "$SRCDIR/%04d.fimg" $idx)
vb=$(( $(( idx + OFFS )) % NBRE))
imgB=$(printf "$SRCDIR/%04d.fimg" $vb)
# ... and the output filename
#
dst=$(printf "%s/%05d.png" ${DSTDIR} $idx)
printf " %20s %20s %8df %20s\n" $imgA $imgB $vb $dst
# trying to autocompute the mixing coefficient
#
compute=" s(${idx} / 16) "
K=$(echo $compute | bc -l)
printf " %25s => %8.3f\n" "$compute" $K
# do the hard floating computation
#
fimgfx -v cos010 ${imgB} ${FTMP}
fimgops -k ${K} ${FTMP} ${imgA} mix ${FDST}
# write the output as PNG for video encoding
#
fimg2png ${FDST} ${dst}
done
# ------------------------------------------------------------