# Documentation

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## Decoder

### Table of Contents

#### Classes

Binarizer
  This class implements a local thresholding algorithm, which while slower than the GlobalHistogramBinarizer, is fairly efficient for what it does. It is designed for high frequency images of barcodes with black data on white backgrounds. For this application, it does a much better job than a global blackpoint with severe shadows and gradients.
BitMatrix
  Extended QRMatrix to map read data from the Binarizer
Decoder
  The main class which implements QR Code decoding -- as opposed to locating and extracting the QR Code from an image.
DecoderResult
  Encapsulates the result of decoding a matrix of bits. This typically applies to 2D barcode formats. For now, it contains the raw bytes obtained as well as a String interpretation of those bytes, if applicable.
QRCodeDecoderException
  An exception container
ReedSolomonDecoder
  Implements Reed-Solomon decoding

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