trex.Algo
Class StegoAlgoRGB

java.lang.Object
  |
  +--trex.Algo.StegoAlgo
        |
        +--trex.Algo.StegoAlgoRGB

Direct Known Subclasses:

StegoAlgoLSB

public abstract class StegoAlgoRGB

extends StegoAlgo

This extension to standard StegoAlgos allows for an easier implementation, if the subjacent algorithm only works "pixel-wise", taking one pixel at a time and returning another. In this case, a TRexFilterRGB must be returned as declared by the getDecryptFilter(int, int) and getEncryptFilter(java.lang.String, int, int). Traversing the image then is done by the filtering routines of the java.awt.

Field Summary

Fields inherited from class trex.Algo.StegoAlgo

passPhrase

Constructor Summary

StegoAlgoRGB()

Method Summary

int	defaultAmplification() Return the default amplification of this algorithm for the combinedPanel.
String	getDecrypted(ImageIcon img) Return the string contained in the ImageIcon.
protected abstract TRexFilterRGB	getDecryptFilter(int w, int h) Return a decrypt filter for this algorithm.
ImageIcon	getEncrypted(String data, ImageIcon img) Return an image hiding the data.
protected abstract TRexFilterRGB	getEncryptFilter(String data, int w, int h) Return an encrypt filter for this algorithm.

Methods inherited from class trex.Algo.StegoAlgo

getConfigDialog, getInfo, hasConfigDialog, hasPassPhrase, pictureLargeEnough, setPassPhrase, validConfig

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

StegoAlgoRGB

public StegoAlgoRGB()

Method Detail

getDecrypted

public String getDecrypted(ImageIcon img)
                    throws DecryptImpossibleException

Return the string contained in the ImageIcon.

Specified by:

getDecrypted in class StegoAlgo

Parameters:

img - The image hiding the data.

Returns:

The hidden String.

DecryptImpossibleException

getEncrypted

public ImageIcon getEncrypted(String data,
                              ImageIcon img)

Return an image hiding the data.

Specified by:

getEncrypted in class StegoAlgo

Parameters:

data - Data to hide.

img - Envelope image.

Returns:

The ImageIcon hiding the data.

getDecryptFilter

protected abstract TRexFilterRGB getDecryptFilter(int w,
                                                  int h)

Return a decrypt filter for this algorithm.

Parameters:

w - Picture's width

h - Picture's height

Returns:

The ImageFilter that does all the work.

getEncryptFilter

protected abstract TRexFilterRGB getEncryptFilter(String data,
                                                  int w,
                                                  int h)

Return an encrypt filter for this algorithm.

Parameters:

data - Data to hide while filtering

w - Picture's width

h - Picture's height

Returns:

The ImageFilter that does all the work.

defaultAmplification

public int defaultAmplification()

Return the default amplification of this algorithm for the combinedPanel.

Specified by:

defaultAmplification in class StegoAlgo

Returns:

Default amplification: 255.