https://imagemagick.org/script/download.php#windows

convert -size 320x240 -rotate 90 -depth 8 inputfile.jpg \
            -channel R +level 0,31 -evaluate multiply 2048 +channel \
            -channel G +level 0,63 -evaluate multiply 32 +channel \
            -channel B +level 0,31 -evaluate multiply 1 +channel \
            -channel RGBA -separate +channel  \
            -channel R -evaluate-sequence add  +channel \
            -depth 16   R:outputfile.raw