java.lang.Object
- java.lang.Thread
- - gov.nih.mipav.model.algorithms.AlgorithmBase
  - - gov.nih.mipav.model.algorithms.filters.AlgorithmEllipticFilter

All Implemented Interfaces:

java.awt.event.ActionListener, java.awt.event.WindowListener, java.lang.Runnable, java.util.EventListener
```
public class AlgorithmEllipticFilter
extends AlgorithmBase
```
This module contains a port from FORTRAN to Java of the FORTRAN program for designing elliptic-function filters and a port from MATLAB to Java of the MATLAB program ellipap1 for designing an elliptic analog lowpass filter prototype found in "Elliptic Functions for Filter Design" by H. J. Orchard and Alan N. Willson, Jr. in IEEE Transactions on Circuits and Systems-I: Fundamental Theory and Applications, Vol. 44. No. 4, April, 1997, pp. 273-287. Permission to port code kindly granted by Alan N. Willson, Jr.

Nested Class Summary
- Nested classes/interfaces inherited from class java.lang.Thread
  java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields
Modifier and Type	Field	Description
`private double[]`	`D0`
`private double[]`	`D1`
`private double[]`	`D2`
`private boolean`	`displayOutput`
`private double[]`	`gain`
`private double`	`k`
`private int`	`n`
`private double[]`	`N0`
`private int`	`n2`
`private double[]`	`N2`
`private int`	`n3`
`private int`	`no`
`private double[]`	`pimag`
`private double[]`	`preal`
`private double`	`rp`
`private double`	`rs`
`private boolean`	`runFORTRAN`
`private boolean`	`test`
`private double[]`	`zimag`

Fields inherited from class gov.nih.mipav.model.algorithms.AlgorithmBase
destFlag, destImage, image25D, mask, maxProgressValue, minProgressValue, multiThreadingEnabled, nthreads, progress, progressModulus, progressStep, runningInSeparateThread, separable, srcImage, threadStopped

Fields inherited from class java.lang.Thread
MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors
Constructor	Description
`AlgorithmEllipticFilter()`	The FORTRAN example in the article of n = 7, apd = 0.1dB, k = 0.8 gives in Table VI: Make FORTRAN zeros poles and FORTRAN poles zeros Poles: -0.0455944342 + j1.026557002 -0.1713670100 + j0.918389608 -0.3689660125 + j0.603979789 -0.4980421689 + j0.0 Zeros: 1.268831784 1.467798747 2.384834232 For the MATLAB example rs = 55.43dB.
`AlgorithmEllipticFilter(int n, double rp, double k, double[] preal, double[] pimag, double[] zimag, boolean displayOutput)`
`AlgorithmEllipticFilter(int n, double rp, double rs, double[] zimag, double[] preal, double[] pimag, double[] gain, boolean displayOutput)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`ellipap1()`
`void`	`finalize()`	Prepares this class for destruction.
`double`	`find3dBfrequency()`
`double`	`findGain(double w)`
`void`	`generatePoly()`
`void`	`runAlgorithm()`	Actually runs the algorithm.
`void`	`runFORTRAN()`	Starts the program.
`void`	`runTest()`
`private double`	`zabs(double zr, double zi)`	zabs computes the absolute value or magnitude of a double precision complex variable zr + j*zi.
`private void`	`zdiv(double ar, double ai, double br, double bi, double[] cr, double[] ci)`	complex divide c = a/b.
`private void`	`zmlt(double ar, double ai, double br, double bi, double[] cr, double[] ci)`	complex multiply c = a * b.

Methods inherited from class gov.nih.mipav.model.algorithms.AlgorithmBase
actionPerformed, addListener, addProgressChangeListener, calculateImageSize, calculatePrincipleAxis, computeElapsedTime, computeElapsedTime, convertIntoFloat, delinkProgressToAlgorithm, delinkProgressToAlgorithmMulti, displayError, errorCleanUp, fireProgressStateChanged, fireProgressStateChanged, fireProgressStateChanged, fireProgressStateChanged, fireProgressStateChanged, generateProgressValues, getDestImage, getElapsedTime, getMask, getMaxProgressValue, getMinProgressValue, getNumberOfThreads, getProgress, getProgressChangeListener, getProgressChangeListeners, getProgressModulus, getProgressStep, getProgressValues, getSrcImage, isCompleted, isImage25D, isMultiThreadingEnabled, isRunningInSeparateThread, isThreadStopped, linkProgressToAlgorithm, linkProgressToAlgorithm, makeProgress, notifyListeners, removeListener, removeProgressChangeListener, run, setCompleted, setImage25D, setMask, setMaxProgressValue, setMinProgressValue, setMultiThreadingEnabled, setNumberOfThreads, setProgress, setProgressModulus, setProgressStep, setProgressValues, setProgressValues, setRunningInSeparateThread, setSrcImage, setStartTime, setThreadStopped, startMethod, windowActivated, windowClosed, windowClosing, windowDeactivated, windowDeiconified, windowIconified, windowOpened

Methods inherited from class java.lang.Thread
activeCount, checkAccess, clone, countStackFrames, currentThread, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, onSpinWait, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, suspend, toString, yield

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

- Field Detail
  - n
```
private int n
```
  - rp
```
private double rp
```
  - k
```
private double k
```
  - displayOutput
```
private boolean displayOutput
```
  - no
```
private int no
```
  - n2
```
private int n2
```
  - n3
```
private int n3
```
  - runFORTRAN
```
private boolean runFORTRAN
```
  - rs
```
private double rs
```
  - zimag
```
private double[] zimag
```
  - preal
```
private double[] preal
```
  - pimag
```
private double[] pimag
```
  - gain
```
private double[] gain
```
  - N2
```
private double[] N2
```
  - N0
```
private double[] N0
```
  - D2
```
private double[] D2
```
  - D1
```
private double[] D1
```
  - D0
```
private double[] D0
```
  - test
```
private boolean test
```
- Constructor Detail
  - AlgorithmEllipticFilter
```
public AlgorithmEllipticFilter()
```
    The FORTRAN example in the article of n = 7, apd = 0.1dB, k = 0.8 gives in Table VI: Make FORTRAN zeros poles and FORTRAN poles zeros Poles: -0.0455944342 + j1.026557002 -0.1713670100 + j0.918389608 -0.3689660125 + j0.603979789 -0.4980421689 + j0.0 Zeros: 1.268831784 1.467798747 2.384834232 For the MATLAB example rs = 55.43dB. ellipap1 PORT gives: Zeros: j * -2.384764161974976 j * 2.384764161974976 j * -1.4677649005263902 j * 1.4677649005263902 j * -1.268807714942811 j * 1.268807714942811 Poles: -0.368967058832794 + j * -0.6039890555820511 -0.368967058832794 + j * 0.6039890555820511 -0.17136300802103874 + j * -0.9183938396880713 -0.17136300802103874 + j * 0.9183938396880713 -0.04559255065683074 + j * -1.026556156803157 -0.04559255065683074 + j * 1.026556156803157 -0.498050705720998 + j * 0.0 Gain = 0.011657502783825976
  - AlgorithmEllipticFilter
```
public AlgorithmEllipticFilter(int n,
                               double rp,
                               double k,
                               double[] preal,
                               double[] pimag,
                               double[] zimag,
                               boolean displayOutput)
```
    Parameters:
    
    n -
    
    apd -
    
    k -
    
    preal -
    
    pimag -
    
    zimag -
    
    displayOutput -
  - AlgorithmEllipticFilter
```
public AlgorithmEllipticFilter(int n,
                               double rp,
                               double rs,
                               double[] zimag,
                               double[] preal,
                               double[] pimag,
                               double[] gain,
                               boolean displayOutput)
```
- Method Detail
  - finalize
```
public void finalize()
```
    Prepares this class for destruction.
    
    Overrides:
    
    finalize in class AlgorithmBase
  - runAlgorithm
```
public void runAlgorithm()
```
    Description copied from class: AlgorithmBase
    
    Actually runs the algorithm. Implemented by inheriting algorithms.
    
    Specified by:
    
    runAlgorithm in class AlgorithmBase
  - runTest
```
public void runTest()
```
  - runFORTRAN
```
public void runFORTRAN()
```
    Starts the program.
  - ellipap1
```
public void ellipap1()
```
  - generatePoly
```
public void generatePoly()
```
  - findGain
```
public double findGain(double w)
```
  - find3dBfrequency
```
public double find3dBfrequency()
```
  - zmlt
```
private void zmlt(double ar,
                  double ai,
                  double br,
                  double bi,
                  double[] cr,
                  double[] ci)
```
    complex multiply c = a * b.
    
    Parameters:
    
    ar - double
    
    ai - double
    
    br - double
    
    bi - double
    
    cr - double[]
    
    ci - double[]
  - zdiv
```
private void zdiv(double ar,
                  double ai,
                  double br,
                  double bi,
                  double[] cr,
                  double[] ci)
```
    complex divide c = a/b.
    
    Parameters:
    
    ar - double
    
    ai - double
    
    br - double
    
    bi - double
    
    cr - double[]
    
    ci - double[]
  - zabs
```
private double zabs(double zr,
                    double zi)
```
    zabs computes the absolute value or magnitude of a double precision complex variable zr + j*zi.
    
    Parameters:
    
    zr - double
    
    zi - double
    
    Returns:
    
    double

Class AlgorithmEllipticFilter

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

Field Summary

Fields inherited from class gov.nih.mipav.model.algorithms.AlgorithmBase

Fields inherited from class java.lang.Thread

Constructor Summary

Method Summary

Methods inherited from class gov.nih.mipav.model.algorithms.AlgorithmBase

Methods inherited from class java.lang.Thread

Methods inherited from class java.lang.Object

Field Detail

n

rp

k

displayOutput

no

n2

n3

runFORTRAN

rs

zimag

preal

pimag

gain

N2

N0

D2

D1

D0

test

Constructor Detail

AlgorithmEllipticFilter

AlgorithmEllipticFilter

AlgorithmEllipticFilter

Method Detail

finalize

runAlgorithm

runTest

runFORTRAN

ellipap1

generatePoly

findGain

find3dBfrequency

zmlt

zdiv

zabs