research-portable-memory/im-crop

IMG=$1
CELL=25
DX=$6
DY=$7
DW=$8
DH=$9
X=$(($2 * $CELL + $DX))
Y=$(($3 * $CELL + $DY))
W=$(($4 * $CELL + $DW))
H=$(($5 * $CELL + $DH))
magick $IMG -crop ${W}x${H}+${X}+${Y} crop.$IMG