batch scanner for `scanimage`

batchscan

#!/bin/bash

## variables ##
NUM=0
PRE=""
X=""
Y=""
RES=""
QAL=""
REV=""
ZEROS=4

#if [ "$1" == "" ]; then
#    echo "append '--help' for more information"
#    exit 1
#fi

while [ "$1" != "" ]; do
    case "$1" in
        --help)
            echo "Usage: ${0##*/} [OPTION]..."
            echo "    --help         show this help file"
            echo "    --start        number to start at"
            echo "    --prefix       what to start the filename with"
            echo "    -x             width of scan-area (in mm)"
            echo "    -y             height of scan-area (in mm)"
            echo "    --resolution   the resolution of the scanned image (in dpi)"
            echo "    --quality      jpeg quality (worst 0 - 100 best"
            echo "    --reverse      the back of the image must also be scanned"
            exit 1
            ;;
        --start)
            shift
            NUM=$1
            ;;
        --prefix)
            shift
            PRE="$1"
            ;;
        -x)
            shift
            X=$1
            ;;
        -y)
            shift
            Y=$1
            ;;
        --resolution)
            shift
            RES=$1
            ;;
        --quality)
            shift
            QAL=$1
            ;;
        --reverse)
            REV="b"
            ;;
    esac
    shift
done

KEY=""
while [ "$KEY" != "q" ]; do
    # switch to reverse side
    if [ "$REV" == "a" ]; then
        REV="b"
        NUM=$((NUM-1))
    elif [ "$REV" == "b" ]; then
        REV="a"
    fi
    
    # add zeros to the beginning of the number
    STRNUM="$NUM"
    while [ ${#STRNUM} -lt $ZEROS ]; do
        STRNUM="0$STRNUM"
    done
    
    # set filename
    if [ "$PRE" != "" ]; then
        FILE="${PRE}-${STRNUM}${REV}.jpg"
    else
        FILE="${STRNUM}${REV}.jpg"
    fi
    
    # set scanner options
    SOPTS="--compression none"
    if [ "$RES" != "" ]; then
        SOPTS="$SOPTS --resolution $RES"
    fi
    if [ "$X" != "" ]; then
        SOPTS="$SOPTS -x $X"
    fi
    if [ "$Y" != "" ]; then
        SOPTS="$SOPTS -y $Y"
    fi
    
    # set converter options
    COPTS=""
    if [ "$QAL" != "" ]; then
        COPTS="-quality $QAL"
    fi
    
    # scan image
    echo "Scanning: $FILE"
    scanimage $SOPTS | convert - $COPTS "$FILE"
    
    # increase number
    NUM=$((NUM+1))
    
    # wait
    beep    # audible clue
    read -n 1 -p "Press any key to continue... (q to Quit)" KEY
    echo ""
done