Package com.google.zxing.common.reedsolomon

Reed-Solomon error correction algorithms for ZXing barcode library.

See: Description

Class Summary

Class	Description
GenericGF	This class contains utility methods for performing mathematical operations over the Galois Fields.
GenericGFPoly	Represents a polynomial whose coefficients are elements of a GF.
ReedSolomonEncoder	Implements Reed-Solomon encoding, as the name implies.

Package com.google.zxing.common.reedsolomon Description

Reed-Solomon error correction algorithms for ZXing barcode library. This package provides implementations of Reed-Solomon error correction codes used in 2D matrix barcodes like QR codes and Data Matrix. Reed-Solomon codes enable the detection and correction of errors in barcode data, improving reliability and readability even when the barcode is partially damaged or obscured.

Key Components

• GenericGF - Generic Galois Field implementation
• GenericGFPoly - Generic Galois Field Polynomial
• ReedSolomonEncoder - Reed-Solomon encoding implementation

Main Features

• Support for multiple field sizes (GF(256), GF(4096), etc.)
• Efficient encoding and decoding algorithms
• Error detection and correction capabilities
• Configurable error correction levels
• Optimized for barcode applications

Usage in Barcodes

• QR Code error correction
• Data Matrix error correction
• Aztec error correction
• PDF417 error correction

Related Packages

• com.google.zxing.common - Common ZXing utilities
• com.google.zxing.qrcode - QR code implementation
• Data Matrix implementation (see com.google.zxing.datamatrix package)

Mathematical Background

Reed-Solomon codes are block-based error correction codes that work by adding redundant data to messages. They can detect and correct multiple errors within a block, making them ideal for applications where data integrity is critical but the transmission medium may be unreliable.