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CSJ2K.j2k.wavelet.analysis.AnWTFilterIntLift5x3

AnWTFilterIntLift5x3 Class

This class inherits from the analysis wavelet filter definition for int data. It implements the forward wavelet transform specifically for the 5x3 filter. The implementation is based on the lifting scheme.

       <p>See the AnWTFilter class for details such as normalization, how to split
       odd-length signals, etc. In particular, this method assumes that the
       low-pass coefficient is computed first.</p>
Inheritance
object
AnWTFilter
AnWTFilterInt
AnWTFilterIntLift5x3
Implements
Namespace: CSJ2K.j2k.wavelet.analysis
Assembly: C1.WPF.PdfViewer.4.6.2.dll
Syntax
public class AnWTFilterIntLift5x3 : AnWTFilterInt, WaveletFilter

Constructors

Name Description
AnWTFilterIntLift5x3()

Properties

Name Description
AnHighNegSupport

Returns the negative support of the high-pass analysis filter. That is the number of taps of the filter in the negative direction.
AnHighPosSupport

Returns the positive support of the high-pass analysis filter. That is the number of taps of the filter in the negative direction.
AnLowNegSupport

Returns the negative support of the low-pass analysis filter. That is the number of taps of the filter in the negative direction.
AnLowPosSupport

Returns the positive support of the low-pass analysis filter. That is the number of taps of the filter in the negative direction.
FilterType

Returns the type of filter used according to the FilterTypes interface (W5x3).
ImplType

Returns the implementation type of this filter, as defined in this class, such as WT_FILTER_INT_LIFT, WT_FILTER_FLOAT_LIFT, WT_FILTER_FLOAT_CONVOL.
Reversible

Returns the reversibility of the filter. A filter is considered reversible if it is suitable for lossless coding.
SynHighNegSupport

Returns the negative support of the high-pass synthesis filter. That is the number of taps of the filter in the negative direction.
SynHighPosSupport

Returns the positive support of the high-pass synthesis filter. That is the number of taps of the filter in the negative direction.
SynLowNegSupport

Returns the negative support of the low-pass synthesis filter. That is the number of taps of the filter in the negative direction.
SynLowPosSupport

Returns the positive support of the low-pass synthesis filter. That is the number of taps of the filter in the negative direction.

Methods

Name Description
Equals(object)

Tests if the 'obj' object is the same filter as this one. Two filters are the same if the same filter code should be output for both filters by the encodeFilterCode() method.

       <p>Currently the implementation of this method only tests if 'obj' is
       also of the class AnWTFilterIntLift5x3.</p>
GetHashCode()
ToString()

Debugging method
analyze_hpf(int[], int, int, int, int[], int, int, int[], int, int)

A specific version of the analyze_hpf() method that works on int data. See the general description of the analyze_hpf() method in the AnWTFilter class for more details.
analyze_lpf(int[], int, int, int, int[], int, int, int[], int, int)

An implementation of the analyze_lpf() method that works on int data, for the forward 5x3 wavelet transform using the lifting scheme. See the general description of the analyze_lpf() method in the AnWTFilter class for more details.

       <p>The coefficients of the first lifting step are [-1/2 1 -1/2].</p><p>The coefficients of the second lifting step are [1/4 1 1/4].</p>
getHPSynthesisFilter()

Returns the time-reversed high-pass synthesis waveform of the filter, which is the high-pass filter. This is the time-reversed impulse response of the high-pass synthesis filter. It is used to calculate the L2-norm of the synthesis basis functions for a particular subband (also called energy weight).

       <p>The returned array may not be modified (i.e. a reference to the
       internal array may be returned by the implementation of this
       method).</p>
getLPSynthesisFilter()

Returns the time-reversed low-pass synthesis waveform of the filter, which is the low-pass filter. This is the time-reversed impulse response of the low-pass synthesis filter. It is used to calculate the L2-norm of the synthesis basis functions for a particular subband (also called energy weight).

       <p>The returned array may not be modified (i.e. a reference to the
       internal array may be returned by the implementation of this
       method).</p>
isSameAsFullWT(int, int, int)

Returns true if the wavelet filter computes or uses the same "inner" subband coefficient as the full frame wavelet transform, and false otherwise. In particular, for block based transforms with reduced overlap, this method should return false. The term "inner" indicates that this applies only with respect to the coefficient that are not affected by image boundaries processings such as symmetric extension, since there is not reference method for this.

       <p>The result depends on the length of the allowed overlap when
       compared to the overlap required by the wavelet filter. It also depends
       on how overlap processing is implemented in the wavelet filter.</p>

See Also