C# Class zxingwp7.Binarizer

This class hierarchy provides a set of methods to convert luminance data to 1 bit data. It allows the algorithm to vary polymorphically, for example allowing a very expensive thresholding technique for servers and a fast one for mobile. It also permits the implementation to vary, e.g. a JNI version for Android and a Java fallback version for other platforms.
Exibir arquivo Open project: henningms/zxing2.0-wp7 Class Usage Examples

Public Methods

Method Description
createBinarizer ( LuminanceSource source ) : Binarizer

Creates a new object with the same type as this Binarizer implementation, but with pristine state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache of 1 bit data. See Effective Java for why we can't use Java's clone() method.
getBlackRow ( int y, BitArray row ) : BitArray

Converts one row of luminance data to 1 bit data. May actually do the conversion, or return cached data. Callers should assume this method is expensive and call it as seldom as possible. This method is intended for decoding 1D barcodes and may choose to apply sharpening. For callers which only examine one row of pixels at a time, the same BitArray should be reused and passed in with each call for performance. However it is legal to keep more than one row at a time if needed.

Protected Methods

Method Description
Binarizer ( LuminanceSource source ) : System

Method Details

Binarizer() protected method

protected Binarizer ( LuminanceSource source ) : System
source LuminanceSource
return System

createBinarizer() public abstract method

Creates a new object with the same type as this Binarizer implementation, but with pristine state. This is needed because Binarizer implementations may be stateful, e.g. keeping a cache of 1 bit data. See Effective Java for why we can't use Java's clone() method.
public abstract createBinarizer ( LuminanceSource source ) : Binarizer
source LuminanceSource The LuminanceSource this Binarizer will operate on. ///
return Binarizer

getBlackRow() public abstract method

Converts one row of luminance data to 1 bit data. May actually do the conversion, or return cached data. Callers should assume this method is expensive and call it as seldom as possible. This method is intended for decoding 1D barcodes and may choose to apply sharpening. For callers which only examine one row of pixels at a time, the same BitArray should be reused and passed in with each call for performance. However it is legal to keep more than one row at a time if needed.
public abstract getBlackRow ( int y, BitArray row ) : BitArray
y int The row to fetch, 0 <= y < bitmap height. ///
row zxingwp7.common.BitArray An optional preallocated array. If null or too small, it will be ignored. /// If used, the Binarizer will call BitArray.clear(). Always use the returned object. ///
return zxingwp7.common.BitArray