#! /bin/csh -f
# Last edited on 2001-10-27 16:01:28 by stolfi

# 

# convert ceram-1.png iab-ceram-1.ppm
# 
# cat iab-ceram-1.ppm \
#   | pnmrotate -4 \
#   > iab-ceram-1-r.ppm
# 
# cat iab-ceram-1-r.ppm \
#   | pnmcut 30 83 290 392 \
#   > iab-ceram-1-c.ppm

cat iab-ceram-1-c.ppm \
  | ppmtopgm \
  | pnmdepth 255 \
  > iab-ceram-1-c.pgm
 
# Generate a smoothed version of the image:
# cat iab-ceram-1-c.pgm \
#   | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth \
#   > iab-ceram-1-c-s.pgm
# cat iab-ceram-1-c-s.pgm \
#   | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth \
#   > iab-ceram-1-c-ss.pgm
# cat iab-ceram-1-c-ss.pgm \
#   | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth \
#   > iab-ceram-1-c-sss.pgm
# cat iab-ceram-1-c-sss.pgm \
#   | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth | pnmsmooth \
#   > iab-ceram-1-c-ssss.pgm
# 
# pnmxarith -mix 1.0 -0.6 iab-ceram-1-c.pgm iab-ceram-1-c-ssss.pgm \
#   > iab-ceram-1-sharp.pgm
# 
cat iab-ceram-1-sharp.pgm \
  | pgmnorm -bvalue 0 -wvalue 104 \
  | pnmscale 2 \
  | pnmdepth 255 \
  > iab-ceram-1-norm.pgm