Brightening Nikon Raw Files when converting to JPG

Hello, 

I wrote a little shell script for a fast convert from Nikon Raw Files to JPG.
The code snippet below works, but I want to enhance this script for the 
ability to take the white balance from the raw file and to brighten the image 
for one or two aperture stop.

Is this possible in this command or do I have to use dcraw or ufraw as 
suggested here? 
> http://photo.net/nikon-camera-forum/00Jf7V

ufraw-batch does not work for me for some reasons and i like to use convert 
directly

Thanks in advance
Axel Rosenski 


=== SNIP ===
Code: 

 
count_files=1
for neffile in *.[nN][eE][fF]; do
 
  nefext="${neffile##*.}" 
  jpgfile=$(basename $neffile .$nefext).jpg


# Leichte Entrauschung durch Gauss-Filter und USM. Umwandlung nach JPEG.
  convert $neffile \
    -quality "85" \
    -gaussian 1x1 \
    -unsharp 2x1.4+1+0.02 \
    -resize "31%" \
    -bordercolor "#808080" \
    -border 1 \
    \( +clone -background black -shadow 75x5+5+5 \) +swap \
    -background "#d9d9d9" -layers merge +repage \
    -gravity "SouthEast" \
    "/home/ar/Multimedia/Bilder/stempel/stempel_axel3.png" \
    -gravity "SouthEast" \
    -composite $jpgfile
   
  echo "Step 2: transferring EXIF data"

# Übertragung der EXIF-Daten von den nef- auf die JPEG-Dateien.

  exiftool -TagsFromFile $neffile -author='Axel Rosenski' -x Orientation 
$jpgfile


=== SNIP ===


-- 
Axel Rosenski
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