RAW to PPM (dcraw) to JPG (imagemagick)

raw_to_ppm_to_jpg.sh

#!/bin/bash

set -euo pipefail

# Find files created within 1 days (`-ctime -1`);
# convert (Nikon/NEF) RAW images to PPM using dcraw;
# write results to stdout with -c;
# convert stdin to JPG using Imagemagick's convert;
# specify format of input image with 'ppm:-'.
find /path/to/sdcard/ -name '*.NEF' -ctime -1 \
  | parallel 'dcraw -c {} \
  | convert -verbose ppm:- {/.}.jpg'