Generate quick small thumbnails from a folder of raw files using DCRAW, ImageMagick, and cjpeg.

thumbs_from_raw.sh

#!/bin/bash

if [ ! -d "../thumb" ]
then
    mkdir ../thumb
fi

for i in *
do
    if [[ $i == *.RWZ ]] || [[ $i == *.RW2 ]] || [[ $i == *.CR2 ]] || [[ $i == *.DNG ]] || [[ $i == *.ARW ]] || [[ $i == *.ERF ]] || [[ $i == *.NRW ]] || [[ $i == *.RAF ]] || [[ $i == *.NEF ]] || [[ $i == *.K25 ]] || [[ $i == *.DNG ]] || [[ $i == *.SRF ]] || [[ $i == *.EIP ]] || [[ $i == *.DCR ]] || [[ $i == *.RAW ]] || [[ $i == *.CRW ]] || [[ $i == *.3FR ]] || [[ $i == *.BAY ]] || [[ $i == *.MEF ]] || [[ $i == *.CS1 ]] || [[ $i == *.KDC ]] || [[ $i == *.ORF ]] || [[ $i == *.ARI ]] || [[ $i == *.SR2 ]] || [[ $i == *.MOS ]] || [[ $i == *.MFW ]] || [[ $i == *.CR3 ]] || [[ $i == *.FFF ]] || [[ $i == *.SRW ]] || [[ $i == *.J6I ]] || [[ $i == *.X3F ]] || [[ $i == *.KC2 ]] || [[ $i == *.RWL ]] || [[ $i == *.MRW ]] || [[ $i == *.PEF ]] || [[ $i == *.IIQ ]] || [[ $i == *.CXI ]] || [[ $i == *.MDC ]]
    then
        new_file_name=$(sed 's/ /_/g' <<< "${i%.*}_thumb.jpg")
        
        dcraw -e -c $i | convert - -quiet -thumbnail 1600\> -auto-gamma -auto-level -normalize -quality 100 - | cjpeg > ../thumb/$new_file_name

        echo "$i thumb created"
    fi
done