Inheritance diagram for org.quark.stegnos.Steganos:

Static Public Member Functions
static int	getVersion (PImage stegno)

static int	getBurdenType (PImage stegno)

static PImage	embedImage (String pphrase, PImage carrier, PImage burden)

static PImage	extractImage (String pphrase, PImage stegan)

static PImage	embedText (String pphrase, PImage carrier, String burden)

static String	extractText (String pphrase, PImage stegan)

static Analysis	analyze (PImage carrier, PImage burden)

static Analysis	analyze (PImage carrier, String burden)

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 the main user API for this library and provides methods to

In this documentation I use the term 'stegan' to represent any image with a hidden burden.

embed an image into a carrier image
embed text into a carrier image
extract an image from a stegan
extract text from a stegan
analyze an image<>image combination for a stegan
analyze an image<>text combination for a stegan

Author: Peter Lager

Member Function Documentation

static Analysis org.quark.stegnos.Steganos.analyze	(	PImage	carrier,
		PImage	burden
	)

static

Analyze a possible image-image combination and confirm that it is a usable combination.

Parameters

carrier	proposed carrier image
burden	proposed burden image

Returns: an analysis of this potential combination

static Analysis org.quark.stegnos.Steganos.analyze	(	PImage	carrier,
		String	burden
	)

static

Analyze a possible image-text combination and confirm that it is a usable combination.

Parameters

carrier	proposed carrier image
burden	proposed burden text

Returns: an analysis of this potential combination

static PImage org.quark.stegnos.Steganos.embedImage	(	String	pphrase,
		PImage	carrier,
		PImage	burden
	)

static

Merge the burden image into the carrier image to create a stegan.
If a password is not supplied the burden will be stored un-encrypted.

Parameters

pphrase	password / pass-phrase
carrier	the carrier image with embedded burden (stegan)
burden	the text to insert

Returns: the stegan

static PImage org.quark.stegnos.Steganos.embedText	(	String	pphrase,
		PImage	carrier,
		String	burden
	)

static

Create a merge the text into the carrier image to make a stegan. If a password is not supplied the burden will be stored un-encrypted.

Parameters

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

Returns: the stegan

static PImage org.quark.stegnos.Steganos.extractImage	(	String	pphrase,
		PImage	stegan
	)

static

Extract the image from the stegan. If a password is not supplied it is assumed that the burden is un-encrypted.

Parameters

pphrase	password / pass-phrase
stegan	the carrier image with embedded burden (stegan)

Returns: null if unable to retrieve the image

static String org.quark.stegnos.Steganos.extractText	(	String	pphrase,
		PImage	stegan
	)

static

Extract the text from the stegan. If a password is not supplied it is assumed that the burden is un-encrypted.

Parameters

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

Returns: null if unable to retrieve text

static int org.quark.stegnos.Steganos.getBurdenType ( PImage stegno )

static

Assuming that the image is in fact a stegan get the type of burden embedded.
If the image is not a steganograph the returned value has no significance.
At present only text and images can be embedded so the value returned will be either Steganos.TEXT_BURDEN or Steganos.IMAGE_BURDEN

Parameters

stegno the stegan

Returns: the burden type

static int org.quark.stegnos.Steganos.getVersion ( PImage stegno )

static

Given a stegan get the version number used to create it. At present there is only one steganography version so will return 0.
If the image is not a steganograph the returned value has no significance.

Parameters

stegno the stegan

Returns: the version number

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

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

Static Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation