various bash operations in one file including forloop, listing all files in a directory, manipulate names to create output name, change backgeound color with image magick

change_bg_color_imagemagick.sh

root=pat/to/root
cd ${root}
for tiffile in *.tif; do
  echo $tiffile
  in_file=${tiffile}
  out_file=${in_file%.*}_whitebg.tif
  convert -fill white -opaque black ${in_file} ${out_file}
done