Redate image files with original exif data

redate.sh

# Set the date of picture files to the EXIF date
function redate () {
  # Replace spaces in filenames with underscores
  echo "Removing spaces..."
  for file in *; do mv "$file" `echo $file | tr ' ' '_'` ; done

  # Get orginal date from EXIF data and update file's metadata dates
  # Required: http://www.sno.phy.queensu.ca/~phil/exiftool/
  echo "Redating..."
  find -E . -type f -iregex '.*\.(jpg|nef)' | while read PIC; do
    echo "Redating $PIC"
    DATE=$(exiftool -p '$DateTimeOriginal' $PIC | sed 's/[: ]//g')
    echo "Date: $DATE"
    echo "Command: touch -t $(echo $DATE | sed 's/\(..$\)/\.\1/') $PIC"
    echo
    touch -t $(echo $DATE | sed 's/\(..$\)/\.\1/') $PIC
  done
}

This is necessary for pictures that are exported from an old Aperture or iPhoto or library. The file's Created and Modified datetimes are the date and time the pictures were exported. This script fixes that.