SynWTFilterFloatLift9x7 (SCIFIO Javadocs 0-SNAPSHOT API)

java.lang.Object
- io.scif.jj2000.j2k.wavelet.synthesis.SynWTFilter
- - io.scif.jj2000.j2k.wavelet.synthesis.SynWTFilterFloat
  - - io.scif.jj2000.j2k.wavelet.synthesis.SynWTFilterFloatLift9x7

All Implemented Interfaces:

Markers, WaveletFilter
```
public class SynWTFilterFloatLift9x7
extends SynWTFilterFloat
```
This class inherits from the synthesis wavelet filter definition for int data. It implements the inverse wavelet transform specifically for the 9x7 filter. The implementation is based on the lifting scheme.
See the SynWTFilter 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.

See Also:

SynWTFilter, SynWTFilterFloat

Field Summary

Fields
Modifier and Type	Field and Description
`static float`	`ALPHA` The value of the first lifting step coefficient
`static float`	`BETA` The value of the second lifting step coefficient
`static float`	`DELTA` The value of the fourth lifting step coefficient
`static float`	`GAMMA` The value of the third lifting step coefficient
`static float`	`KH` The value of the high-pass subband normalization factor
`static float`	`KL` The value of the low-pass subband normalization factor

Fields inherited from interface io.scif.jj2000.j2k.wavelet.WaveletFilter
WT_FILTER_FLOAT_CONVOL, WT_FILTER_FLOAT_LIFT, WT_FILTER_INT_LIFT

Fields inherited from interface io.scif.jj2000.j2k.codestream.Markers
COC, COD, COM, CRG, EOC, EPH, EPH_LENGTH, ERS_SEG_SYMBOLS, ERS_SOP, MAX_COMP_BITDEPTH, MAX_LPPM, MAX_LPPT, PLM, PLT, POC, PPM, PPT, PRECINCT_PARTITION_DEF_SIZE, QCC, QCD, RCOM_GEN_USE, RGN, RSIZ_BASELINE, RSIZ_ER_FLAG, RSIZ_ROI, SCOX_HOR_CB_PART, SCOX_PRECINCT_PARTITION, SCOX_USE_EPH, SCOX_USE_SOP, SCOX_VER_CB_PART, SIZ, SOC, SOD, SOP, SOP_LENGTH, SOT, SQCX_EXP_MASK, SQCX_EXP_SHIFT, SQCX_GB_MSK, SQCX_GB_SHIFT, SQCX_NO_QUANTIZATION, SQCX_SCALAR_DERIVED, SQCX_SCALAR_EXPOUNDED, SRGN_IMPLICIT, SSIZ_DEPTH_BITS, TLM

Constructor Summary

Constructors
Constructor and Description

SynWTFilterFloatLift9x7()

Constructors
Constructor and Description
`SynWTFilterFloatLift9x7()`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`int`	`getAnHighNegSupport()` Returns the negative support of the high-pass analysis filter.
`int`	`getAnHighPosSupport()` Returns the positive support of the high-pass analysis filter.
`int`	`getAnLowNegSupport()` Returns the negative support of the low-pass analysis filter.
`int`	`getAnLowPosSupport()` Returns the positive support of the low-pass analysis filter.
`int`	`getImplType()` 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.
`int`	`getSynHighNegSupport()` Returns the negative support of the high-pass synthesis filter.
`int`	`getSynHighPosSupport()` Returns the positive support of the high-pass synthesis filter.
`int`	`getSynLowNegSupport()` Returns the negative support of the low-pass synthesis filter.
`int`	`getSynLowPosSupport()` Returns the positive support of the low-pass synthesis filter.
`boolean`	`isReversible()` Returns the reversibility of the filter.
`boolean`	`isSameAsFullWT(int tailOvrlp, int headOvrlp, int inLen)` Returns true if the wavelet filter computes or uses the same "inner" subband coefficient as the full frame wavelet transform, and false otherwise.
`void`	`synthetize_hpf(float[] lowSig, int lowOff, int lowLen, int lowStep, float[] highSig, int highOff, int highLen, int highStep, float[] outSig, int outOff, int outStep)` An implementation of the synthetize_hpf() method that works on int data, for the inverse 9x7 wavelet transform using the lifting scheme.
`void`	`synthetize_lpf(float[] lowSig, int lowOff, int lowLen, int lowStep, float[] highSig, int highOff, int highLen, int highStep, float[] outSig, int outOff, int outStep)` An implementation of the synthetize_lpf() method that works on int data, for the inverse 9x7 wavelet transform using the lifting scheme.
`String`	`toString()` Returns a string of information about the synthesis wavelet filter

Methods inherited from class io.scif.jj2000.j2k.wavelet.synthesis.SynWTFilterFloat
getDataType, synthetize_hpf, synthetize_lpf

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Field Detail
  - ALPHA
```
public static final float ALPHA
```
    The value of the first lifting step coefficient
    
    See Also:
    
    Constant Field Values
  - BETA
```
public static final float BETA
```
    The value of the second lifting step coefficient
    
    See Also:
    
    Constant Field Values
  - GAMMA
```
public static final float GAMMA
```
    The value of the third lifting step coefficient
    
    See Also:
    
    Constant Field Values
  - DELTA
```
public static final float DELTA
```
    The value of the fourth lifting step coefficient
    
    See Also:
    
    Constant Field Values
  - KL
```
public static final float KL
```
    The value of the low-pass subband normalization factor
    
    See Also:
    
    Constant Field Values
  - KH
```
public static final float KH
```
    The value of the high-pass subband normalization factor
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SynWTFilterFloatLift9x7
```
public SynWTFilterFloatLift9x7()
```
- Method Detail
  - synthetize_lpf
```
public void synthetize_lpf(float[] lowSig,
                           int lowOff,
                           int lowLen,
                           int lowStep,
                           float[] highSig,
                           int highOff,
                           int highLen,
                           int highStep,
                           float[] outSig,
                           int outOff,
                           int outStep)
```
    An implementation of the synthetize_lpf() method that works on int data, for the inverse 9x7 wavelet transform using the lifting scheme. See the general description of the synthetize_lpf() method in the SynWTFilter class for more details.
    The low-pass and high-pass subbands are normalized by respectively a factor of 1/KL and a factor of 1/KH
    The coefficients of the first lifting step are [-DELTA 1 -DELTA].
    The coefficients of the second lifting step are [-GAMMA 1 -GAMMA].
    The coefficients of the third lifting step are [-BETA 1 -BETA].
    The coefficients of the fourth lifting step are [-ALPHA 1 -ALPHA].
    
    Specified by:
    
    synthetize_lpf in class SynWTFilterFloat
    
    Parameters:
    
    lowSig - This is the array that contains the low-pass input signal.
    
    lowOff - This is the index in lowSig of the first sample to filter.
    
    lowLen - This is the number of samples in the low-pass input signal to filter.
    
    lowStep - This is the step, or interleave factor, of the low-pass input signal samples in the lowSig array.
    
    highSig - This is the array that contains the high-pass input signal.
    
    highOff - This is the index in highSig of the first sample to filter.
    
    highLen - This is the number of samples in the high-pass input signal to filter.
    
    highStep - This is the step, or interleave factor, of the high-pass input signal samples in the highSig array.
    
    outSig - This is the array where the output signal is placed. It should be long enough to contain the output signal.
    
    outOff - This is the index in outSig of the element where to put the first output sample.
    
    outStep - This is the step, or interleave factor, of the output samples in the outSig array.
    
    See Also:
    
    SynWTFilter.synthetize_lpf(java.lang.Object, int, int, int, java.lang.Object, int, int, int, java.lang.Object, int, int)
  - synthetize_hpf
```
public void synthetize_hpf(float[] lowSig,
                           int lowOff,
                           int lowLen,
                           int lowStep,
                           float[] highSig,
                           int highOff,
                           int highLen,
                           int highStep,
                           float[] outSig,
                           int outOff,
                           int outStep)
```
    An implementation of the synthetize_hpf() method that works on int data, for the inverse 9x7 wavelet transform using the lifting scheme. See the general description of the synthetize_hpf() method in the SynWTFilter class for more details.
    The low-pass and high-pass subbands are normalized by respectively a factor of 1/KL and a factor of 1/KH
    The coefficients of the first lifting step are [-DELTA 1 -DELTA].
    The coefficients of the second lifting step are [-GAMMA 1 -GAMMA].
    The coefficients of the third lifting step are [-BETA 1 -BETA].
    The coefficients of the fourth lifting step are [-ALPHA 1 -ALPHA].
    
    Specified by:
    
    synthetize_hpf in class SynWTFilterFloat
    
    Parameters:
    
    lowSig - This is the array that contains the low-pass input signal.
    
    lowOff - This is the index in lowSig of the first sample to filter.
    
    lowLen - This is the number of samples in the low-pass input signal to filter.
    
    lowStep - This is the step, or interleave factor, of the low-pass input signal samples in the lowSig array.
    
    highSig - This is the array that contains the high-pass input signal.
    
    highOff - This is the index in highSig of the first sample to filter.
    
    highLen - This is the number of samples in the high-pass input signal to filter.
    
    highStep - This is the step, or interleave factor, of the high-pass input signal samples in the highSig array.
    
    outSig - This is the array where the output signal is placed. It should be long enough to contain the output signal.
    
    outOff - This is the index in outSig of the element where to put the first output sample.
    
    outStep - This is the step, or interleave factor, of the output samples in the outSig array.
    
    See Also:
    
    SynWTFilter.synthetize_hpf(java.lang.Object, int, int, int, java.lang.Object, int, int, int, java.lang.Object, int, int)
  - getAnLowNegSupport
```
public int getAnLowNegSupport()
```
    Returns the negative support of the low-pass analysis filter. That is the number of taps of the filter in the negative direction.
    
    Returns:
    
    2
  - getAnLowPosSupport
```
public int getAnLowPosSupport()
```
    Returns the positive support of the low-pass analysis filter. That is the number of taps of the filter in the negative direction.
    
    Returns:
    
    The number of taps of the low-pass analysis filter in the positive direction
  - getAnHighNegSupport
```
public int getAnHighNegSupport()
```
    Returns the negative support of the high-pass analysis filter. That is the number of taps of the filter in the negative direction.
    
    Returns:
    
    The number of taps of the high-pass analysis filter in the negative direction
  - getAnHighPosSupport
```
public int getAnHighPosSupport()
```
    Returns the positive support of the high-pass analysis filter. That is the number of taps of the filter in the negative direction.
    
    Returns:
    
    The number of taps of the high-pass analysis filter in the positive direction
  - getSynLowNegSupport
```
public int getSynLowNegSupport()
```
    Returns the negative support of the low-pass synthesis filter. That is the number of taps of the filter in the negative direction.
    A MORE PRECISE DEFINITION IS NEEDED
    
    Returns:
    
    The number of taps of the low-pass synthesis filter in the negative direction
  - getSynLowPosSupport
```
public int getSynLowPosSupport()
```
    Returns the positive support of the low-pass synthesis filter. That is the number of taps of the filter in the negative direction.
    A MORE PRECISE DEFINITION IS NEEDED
    
    Returns:
    
    The number of taps of the low-pass synthesis filter in the positive direction
  - getSynHighNegSupport
```
public int getSynHighNegSupport()
```
    Returns the negative support of the high-pass synthesis filter. That is the number of taps of the filter in the negative direction.
    A MORE PRECISE DEFINITION IS NEEDED
    
    Returns:
    
    The number of taps of the high-pass synthesis filter in the negative direction
  - getSynHighPosSupport
```
public int getSynHighPosSupport()
```
    Returns the positive support of the high-pass synthesis filter. That is the number of taps of the filter in the negative direction.
    A MORE PRECISE DEFINITION IS NEEDED
    
    Returns:
    
    The number of taps of the high-pass synthesis filter in the positive direction
  - getImplType
```
public int getImplType()
```
    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.
    
    Returns:
    
    WT_FILTER_INT_LIFT.
  - isReversible
```
public boolean isReversible()
```
    Returns the reversibility of the filter. A filter is considered reversible if it is suitable for lossless coding.
    
    Returns:
    
    true since the 9x7 is reversible, provided the appropriate rounding is performed.
  - isSameAsFullWT
```
public boolean isSameAsFullWT(int tailOvrlp,
                              int headOvrlp,
                              int inLen)
```
    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.
    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.
    
    Parameters:
    
    tailOvrlp - This is the number of samples in the input signal before the first sample to filter that can be used for overlap.
    
    headOvrlp - This is the number of samples in the input signal after the last sample to filter that can be used for overlap.
    
    inLen - This is the lenght of the input signal to filter.The required number of samples in the input signal after the last sample depends on the length of the input signal.
    
    Returns:
    
    true if both overlaps are greater than 2, and correct processing is applied in the analyze() method.
  - toString
```
public String toString()
```
    Returns a string of information about the synthesis wavelet filter
    
    Overrides:
    
    toString in class Object
    
    Returns:
    
    wavelet filter type.

Class SynWTFilterFloatLift9x7

Field Summary

Fields inherited from interface io.scif.jj2000.j2k.wavelet.WaveletFilter

Fields inherited from interface io.scif.jj2000.j2k.codestream.Markers

Constructor Summary

Method Summary

Methods inherited from class io.scif.jj2000.j2k.wavelet.synthesis.SynWTFilterFloat

Methods inherited from class java.lang.Object

Field Detail

ALPHA

BETA

GAMMA

DELTA

KL

KH

Constructor Detail

SynWTFilterFloatLift9x7

Method Detail

synthetize_lpf

synthetize_hpf

getAnLowNegSupport

getAnLowPosSupport

getAnHighNegSupport

getAnHighPosSupport

getSynLowNegSupport

getSynLowPosSupport

getSynHighNegSupport

getSynHighPosSupport

getImplType

isReversible

isSameAsFullWT

toString