#!/bin/sh

USAGE='Usage: brewbadpixels [-unixtime <value>] raw-file

   Locate indices of bad pixels in a darkframe raw-image and store them with
   current or specified unixtime as <raw-filename>_badpixels.txt.

'

UNIXTIME=`perl -e 'print time,"\n";'`

function namename()
{
    local name=${1##*/}
    local name0="${name%.*}"
    echo "${name0:-$name}"
}

while [ $# -gt 0 ] 
  do
  case "$1" in
      -unixtime)
	  UNIXTIME=$2;
	  shift 1
	  ;;
      -*)	
	  echo "$USAGE" 1>&2
	  exit 2
	  ;;
      *)
	  break
	  ;;
  esac
  shift 1
done

for FILE
  do	
  if [ -f "$FILE" ]; then
      
      BASE=`namename $FILE`

      # Check the histogram:
      #dcraw -P null -v  -D -4 -c -j -t 0 $FILE | pnmgamma -lineartobt709 |
      #ppmhist -sort=rgb

      dcraw -P null -v -D -4 -c -j -t 0 $FILE | pnmgamma -lineartobt709 |
      pnmnorm -colorvalue -wpercent 0.000008 -bpercent 0.000008 | pnmdepth 255 |
      convert ppm:- -threshold 50% -write "${BASE}_badpixels.ppm" txt:- |
      egrep 'white' | sed "s/:.*/ ${UNIXTIME}/g" | sed 's/,/ /g' > "${BASE}_badpixels.txt"

      # 1/nr.of pixels = 1/12.8e6 *100 = 8e-8 *100 = 8e-6 in percentage makes exactly 1 pixel 
      # What does -monochrome do? It is wrong to use - randomized! Use -threshold instead.

      # Pre 091211:
      #dcraw -v -D -4 -c -j -t 0 $FILE | pnmgamma -lineartobt709 |
      #pnmnorm -colorvalue -wpercent 0.00010 -bpercent 99 | pnmdepth 255 |
      #convert ppm:- -monochrome -write "${BASE}_badpixels.ppm" txt:- |
      #egrep 'white' | sed "s/:.*/ ${UNIXTIME}/g" | sed 's/,/ /g' > "${BASE}_badpixels.txt"
      
  fi
  
done