Method computeCheckDigit

src/main/java/com/innovatrics/mrz/MrzParser.java:241–247

Computes MRZ check digit for given string of characters. @param str the string @return check digit in range of 0..9, inclusive. See MRTD documentation part 15 for details.

(String str)

     * @return check digit in range of 0..9, inclusive. See <a href="http://www2.icao.int/en/MRTD/Downloads/Doc%209303/Doc%209303%20English/Doc%209303%20Part%203%20Vol%201.pdf">MRTD documentation</a> part 15 for details.
     */
    public static int computeCheckDigit(String str) {
        int result = 0;
        for (int i = 0; i < str.length(); i++) {
            result += getCharacterValue(str.charAt(i)) * MRZ_WEIGHTS[i % MRZ_WEIGHTS.length];
        }
        return result % 10;
    }

    /**
     * Computes MRZ check digit for given string of characters.