com.google.zxing.pdf417.decoder.ec

Class ErrorCorrection

java.lang.Object

com.google.zxing.pdf417.decoder.ec.ErrorCorrection

public final class ErrorCorrection
extends Object

PDF417 error correction implementation.

This example is quite useful in understanding the algorithm.

Author:

Sean Owen

See Also:

ReedSolomonDecoder

Constructor Summary

Constructors

Constructor and Description
ErrorCorrection()

Method Summary

Methods

Modifier and Type	Method and Description
int	decode(int[] received, int numECCodewords, int[] erasures)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ErrorCorrection

public ErrorCorrection()

Method Detail

decode

public int decode(int[] received,
         int numECCodewords,
         int[] erasures)
           throws ChecksumException

Parameters:

received - received codewords

numECCodewords - number of those codewords used for EC

erasures - location of erasures

Returns:

number of errors

Throws:

ChecksumException - if errors cannot be corrected, maybe because of too many errors