org.quark.stegnos.Steganograph_v0 Class Reference

Inheritance diagram for org.quark.stegnos.Steganograph_v0:

Package Functions
	Steganograph_v0 ()
PImage	embedImageInStegan (String pphrase, PImage cImage, PImage bImage)
PImage	extractImageFromStegan (String pphrase, PImage sImage)
PImage	embedTextInStegan (String pphrase, PImage cImage, String text)
String	extractTextFromStegan (String pphrase, PImage sImage)
void	unpackHeaders (int[] d)
void	packHeaders (int[] h, int hm[])
void	mergeHeadersWithCarrier (int[] h, int[] hm, int[] d)
Analysis	analysis (PImage carrier, PImage burden)
Analysis	analysis (PImage carrier, String burden)

Package Attributes
PImage	bimage

Additional Inherited Members
Public Attributes inherited from org.quark.stegnos.SteganosConstants
int	TEXT_BURDEN = 0x0
int	IMAGE_BURDEN = 0x1
int	RGB = PConstants.RGB
int	ARGB = PConstants.ARGB
int	UTF8 = 0x1
int[]	CARRIER3_BITS = { 0x00000000, 0x00010101, 0x00030303, 0x00070707, 0x000f0f0f, 0x001f1f1f, 0x003f3f3f, 0x007f7f7f, 0x00ffffff }
int[]	CARRIER4_BITS = { 0x00000000, 0x01010101, 0x03030303, 0x07070707, 0x0f0f0f0f, 0x1f1f1f1f, 0x3f3f3f3f, 0x7f7f7f7f, 0xffffffff }
int[]	RGB_MERGED_BITS = { 0x00000000, 0xe0000000, 0xfc000000, 0xff800000, 0xfff00000, 0xfffe0000, 0xffffc000, 0xfffff800, 0xffffff00 }
int[]	ARGB_MERGED_BITS = { 0x00000000, 0xf0000000, 0xff000000, 0xfff00000, 0xffff0000, 0xfffff000, 0xffffff00, 0xfffffff0, 0xffffffff }

Detailed Description

This class provides methods to merge and to extract images or text from a carrier image.

Author

Peter Lager

Constructor & Destructor Documentation

org.quark.stegnos.Steganograph_v0.Steganograph_v0 ( )

package

Private constructor to prevent unwanted instantiations

Member Function Documentation

Analysis org.quark.stegnos.Steganograph_v0.analysis ( PImage  carrier, PImage  burden  )

packagevirtual

Perform an analysis on the proposed carrier / burden combination

Parameters

carrier	the carrier image
burden	the burden image

Returns

the result of the analysis

Implements org.quark.stegnos.Steganograph.

Analysis org.quark.stegnos.Steganograph_v0.analysis ( PImage  carrier, String  burden  )

packagevirtual

Perform an analysis on the proposed carrier / burden combination

Parameters

carrier	the carrier image
burden	the burden text

Returns

the result of the analysis

Implements org.quark.stegnos.Steganograph.

PImage org.quark.stegnos.Steganograph_v0.embedImageInStegan ( String  pphrase, PImage  cImage, PImage  bImage  )

packagevirtual

Merge the burden image into the carrier image to create a stegan.

Parameters

pphrase	password / pass-phrase
stegan	the impregnated image (stegan)
bImage	the text to insert

Returns

the stegan

Implements org.quark.stegnos.Steganograph.

PImage org.quark.stegnos.Steganograph_v0.embedTextInStegan ( String  pphrase, PImage  cImage, String  text  )

packagevirtual

Create a merge the text into the carrier image to make a stegan.

Parameters

pphrase	password / pass-phrase
stegan	the impregnated image (stegan)
text	the text to insert

Returns

the stegan

Implements org.quark.stegnos.Steganograph.

PImage org.quark.stegnos.Steganograph_v0.extractImageFromStegan ( String  pphrase, PImage  sImage  )

packagevirtual

Extract the image from the stegan.

Parameters

pphrase	password / pass-phrase
sImage	the impregnated image (stegan)

Returns

null if unable to retrieve the image

Implements org.quark.stegnos.Steganograph.

String org.quark.stegnos.Steganograph_v0.extractTextFromStegan ( String  pphrase, PImage  sImage  )

packagevirtual

Extract the text from the stegan.

Parameters

pphrase	password / pass-phrase
sImage	the impregnated image (stegan)

Returns

null if unable to retrieve text

Implements org.quark.stegnos.Steganograph.

void org.quark.stegnos.Steganograph_v0.mergeHeadersWithCarrier ( int[]  h, int[]  hm, int[]  d  )

package

Merge the header information into the carrier data

Parameters

h	headers
hm	header masks
d	carrier pixel data

void org.quark.stegnos.Steganograph_v0.packHeaders ( int[]  h, int  hm[]  )

package

Create the headers and masks ready for merging with the carrier data.

Parameters

h	headers header information
hm	header masks used to clear image bits for header info

void org.quark.stegnos.Steganograph_v0.unpackHeaders ( int[]  d )

package

Unpack the header information from the data

Parameters

d	carrier pixel data

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The documentation for this class was generated from the following file:

• /Users/peter/git/steganography-repos/Stenography/src/org/quark/stegnos/Steganograph_v0.java