Bash script and Gnuplot file to create a curve with the codestream size for each frame of a sequence of frames.

how-to-use.md

Step 1

./getbytesperframe.sh 0 100 > sun.dat

Step 2

gnuplot < sun.gpt > sun.svg 

Step 3

display sun.svg

step1-getbytesperframe.sh

#!/bin/bash

if [ $# -ne 2 ]; then
  echo -e "\nUso: $0 <start> <end>\n"
  exit 1
fi

IMAGES_PATH=/home/josejuan/ESA/servers/data/delphi
START=$1
END=$2

i=$START
while [ $i -le $END ]; do

  source=`printf %03d $i`

  BYTES=`kdu_expand -i $IMAGES_PATH/$source.jp2 -o kk.pgm | grep "excluding any file format" | awk '{print $2}'`

  echo -e "$i \t $BYTES" | sed 's/,//g'

  i=$(($i+1))

done

step2-sun.gpt

set terminal svg

set title 'Sun'
set xlabel 'Frame Number'
set ylabel 'Bytes'
set key out bottom

plot "sun.dat" using 1:2 smooth bezier title 'J2K' axes x1y1