JPEG image representation. More...

#include <imagejpeg.h>

Inheritance diagram for SEFormatJPEG::ImageJPEG:

Public Types
enum	HeaderPosition { TOP = 1, BOTTOM = 2, SIGNATURE = 3, TOP = 1, BOTTOM = 2, SIGNATURE = 3 }
enum	HeaderPosition { TOP = 1, BOTTOM = 2, SIGNATURE = 3, TOP = 1, BOTTOM = 2, SIGNATURE = 3 }
Public Member Functions
	ImageJPEG ()
	Create empty instance.
	~ImageJPEG ()
	ImageJPEG (const QString &filePath)
	Create instance from file.
	ImageJPEG (const QPixmap &pixmap, QString filePath="Pixmap")
	Create instance from pixmap.
	ImageJPEG (const Image &image)
	Create instance by copy.
	ImageJPEG (Image *image)
	Create instance by reference.
void	setK (int)
void	setPassphrase (QString)
void	setQuality (int)
void	setHeaderPosition (HeaderPosition)
quint32	capacity () const
	JPEG image capacity (octets)
bool	loadData ()
	load hidden information from current image
bool	saveToDir (QString &)
	Hide information into image and save it to output dir.
	ImageJPEG ()
	~ImageJPEG ()
	ImageJPEG (const QString &filePath)
	ImageJPEG (const QPixmap &pixmap, QString filePath="Pixmap")
	ImageJPEG (const Image &image)
	ImageJPEG (Image *image)
void	setK (int)
void	setPassphrase (QString)
void	setQuality (int)
void	setHeaderPosition (HeaderPosition)
quint32	capacity () const
bool	loadData ()
bool	hideData ()
bool	saveToDir (QString &outputDirPath)
Private Member Functions
void	init ()
int	computeDistributionStep (quint32, int, int)
	Compute distribution step according to data size and image dimension.
QPoint *	computeHeaderPosition (int, int)
	Compute header position (bottom/stop/signature)
bool	isBetweenPoint (const QPoint &, const QPoint &, const QPoint &)
	Check point collision (used when header is signature)
QPoint	computeNewPosition (const QPoint &, int, int width, int height, bool=false)
	Compute next position according to distribution step and block size.
void	init ()
int	computeDistributionStep (quint32 size, int width, int height)
QPoint *	computeHeaderPosition (int width, int height)
bool	isBetweenPoint (const QPoint &, const QPoint &, const QPoint &)
QPoint	computeNewPosition (const QPoint &, int, int width, int height, bool=false)
Private Attributes
QPointer< Logger >	m_logger
	logger
quint16	m_nbBits
	number of pixel to hide into one block
int	m_k
	luminance interval (used for stegotables)
QString	m_passphrase
	passphrase for random stegotable
int	m_quality
	JPEG compression quality.
HeaderPosition	m_headerPosition
	Header position (for data size)
int	m_blockWidth
	Block width used for equi distribution.
int	m_blockHeight
	Block height used for equi distribution.
int	m_blockInnerPos
	Information's position into a block (equi distribution)

Detailed Description

JPEG image representation.

Definition at line 30 of file imagejpeg.h.

Member Enumeration Documentation

enum SEFormatJPEG::ImageJPEG::HeaderPosition

Enumerator:

TOP	hide header at begenning of the image
BOTTOM	hide header at the end of the image
SIGNATURE	hide header at 95% of height and width
TOP	hide header at begenning of the image
BOTTOM	hide header at the end of the image
SIGNATURE	hide header at 95% of height and width

Definition at line 33 of file imagejpeg.h.

enum SEFormatJPEG::ImageJPEG::HeaderPosition

Enumerator:

TOP	hide header at begenning of the image
BOTTOM	hide header at the end of the image
SIGNATURE	hide header at 95% of height and width
TOP	hide header at begenning of the image
BOTTOM	hide header at the end of the image
SIGNATURE	hide header at 95% of height and width

Definition at line 32 of file imagejpeg.h.

Constructor & Destructor Documentation

SEFormatJPEG::ImageJPEG::ImageJPEG ( )

Create empty instance.

SEFormatJPEG::ImageJPEG::~ImageJPEG ( )

Definition at line 57 of file imagejpeg.cpp.

SEFormatJPEG::ImageJPEG::ImageJPEG ( const QString & filePath )

Create instance from file.

Definition at line 33 of file imagejpeg.cpp.

SEFormatJPEG::ImageJPEG::ImageJPEG	(	const QPixmap &	pixmap,
		QString	filePath = `"Pixmap"`
	)

Create instance from pixmap.

Definition at line 39 of file imagejpeg.cpp.

SEFormatJPEG::ImageJPEG::ImageJPEG ( const Image & image )

Create instance by copy.

Definition at line 45 of file imagejpeg.cpp.

SEFormatJPEG::ImageJPEG::ImageJPEG ( Image * image )

Create instance by reference.

Definition at line 51 of file imagejpeg.cpp.

SEFormatJPEG::ImageJPEG::ImageJPEG ( )

SEFormatJPEG::ImageJPEG::~ImageJPEG ( )

SEFormatJPEG::ImageJPEG::ImageJPEG ( const QString & filePath )

SEFormatJPEG::ImageJPEG::ImageJPEG	(	const QPixmap &	pixmap,
		QString	filePath = `"Pixmap"`
	)

SEFormatJPEG::ImageJPEG::ImageJPEG ( const Image & image )

SEFormatJPEG::ImageJPEG::ImageJPEG ( Image * image )

Member Function Documentation

quint32 SEFormatJPEG::ImageJPEG::capacity ( ) const [virtual]

JPEG image capacity (octets)

Reimplemented from SilentEyeFramework::Media.

Definition at line 94 of file imagejpeg.cpp.

Referenced by saveToDir().

quint32 SEFormatJPEG::ImageJPEG::capacity ( ) const [virtual]

Reimplemented from SilentEyeFramework::Media.

int SEFormatJPEG::ImageJPEG::computeDistributionStep	(	quint32	size,
		int	width,
		int	height
	)		`[private]`

Compute distribution step according to data size and image dimension.

Parameters:

size	Data size
width	Number of block in a row
height	Number of block in a column

Definition at line 361 of file imagejpeg.cpp.

int SEFormatJPEG::ImageJPEG::computeDistributionStep	(	quint32	size,
		int	width,
		int	height
	)		`[private]`

QPoint * SEFormatJPEG::ImageJPEG::computeHeaderPosition	(	int	width,
		int	height
	)		`[private]`

Compute header position (bottom/stop/signature)

Parameters:

width	Number of block in a row
height	Number of block in a column

Definition at line 427 of file imagejpeg.cpp.

QPoint* SEFormatJPEG::ImageJPEG::computeHeaderPosition	(	int	width,
		int	height
	)		`[private]`

QPoint SEFormatJPEG::ImageJPEG::computeNewPosition	(	const QPoint &	oldPos,
		int	step,
		int	width,
		int	height,
		bool	first = `false`
	)		`[private]`

Compute next position according to distribution step and block size.

Parameters:

oldPos	Old position
step	Distribution step value
width	Number of block in a row
height	Number of block in a column
first	Compute first position

Definition at line 478 of file imagejpeg.cpp.

QPoint SEFormatJPEG::ImageJPEG::computeNewPosition	(	const QPoint &	,
		int	,
		int	width,
		int	height,
		bool	= `false`
	)		`[private]`

bool SEFormatJPEG::ImageJPEG::hideData ( )

void SEFormatJPEG::ImageJPEG::init ( ) [private]

Definition at line 62 of file imagejpeg.cpp.

void SEFormatJPEG::ImageJPEG::init ( ) [private]

bool SEFormatJPEG::ImageJPEG::isBetweenPoint	(	const QPoint &	ref,
		const QPoint &	start,
		const QPoint &	end
	)		`[private]`

Check point collision (used when header is signature)

Parameters:

ref	Reference point
start	First point of segment
end	End point of segment

Definition at line 464 of file imagejpeg.cpp.

bool SEFormatJPEG::ImageJPEG::isBetweenPoint	(	const QPoint &	,
		const QPoint &	,
		const QPoint &
	)		`[private]`

bool SEFormatJPEG::ImageJPEG::loadData ( ) [virtual]

load hidden information from current image

Reimplemented from SilentEyeFramework::Media.

Definition at line 101 of file imagejpeg.cpp.

bool SEFormatJPEG::ImageJPEG::loadData ( ) [virtual]

Reimplemented from SilentEyeFramework::Media.

bool SEFormatJPEG::ImageJPEG::saveToDir ( QString & outputDirPath ) [virtual]

Reimplemented from SilentEyeFramework::Media.

bool SEFormatJPEG::ImageJPEG::saveToDir ( QString & outputDirPath ) [virtual]

Hide information into image and save it to output dir.

Parameters:

outputDirPath Output directory path for encoded image

Reimplemented from SilentEyeFramework::Media.

Definition at line 219 of file imagejpeg.cpp.

References capacity(), SilentEyeFramework::Media::m_data, and m_logger.

void SEFormatJPEG::ImageJPEG::setHeaderPosition ( HeaderPosition )

void SEFormatJPEG::ImageJPEG::setHeaderPosition ( HeaderPosition pos )

Definition at line 89 of file imagejpeg.cpp.

Referenced by SEFormatJPEG::SEFormatJpeg::updateImage().

void SEFormatJPEG::ImageJPEG::setK ( int )

void SEFormatJPEG::ImageJPEG::setK ( int k )

Definition at line 74 of file imagejpeg.cpp.

Referenced by SEFormatJPEG::SEFormatJpeg::updateImage().

void SEFormatJPEG::ImageJPEG::setPassphrase ( QString )

void SEFormatJPEG::ImageJPEG::setPassphrase ( QString pass )

Definition at line 79 of file imagejpeg.cpp.

Referenced by SEFormatJPEG::SEFormatJpeg::updateImage().

void SEFormatJPEG::ImageJPEG::setQuality ( int quality )

Definition at line 84 of file imagejpeg.cpp.

Referenced by SEFormatJPEG::SEFormatJpeg::updateImage().

void SEFormatJPEG::ImageJPEG::setQuality ( int )

Member Data Documentation

int SEFormatJPEG::ImageJPEG::m_blockHeight [private]

Block height used for equi distribution.

Definition at line 54 of file imagejpeg.h.

int SEFormatJPEG::ImageJPEG::m_blockInnerPos [private]

Information's position into a block (equi distribution)

Definition at line 56 of file imagejpeg.h.

int SEFormatJPEG::ImageJPEG::m_blockWidth [private]

Block width used for equi distribution.

Definition at line 52 of file imagejpeg.h.

HeaderPosition SEFormatJPEG::ImageJPEG::m_headerPosition [private]

Header position (for data size)

Definition at line 50 of file imagejpeg.h.

int SEFormatJPEG::ImageJPEG::m_k [private]

luminance interval (used for stegotables)

Definition at line 44 of file imagejpeg.h.

QPointer< Logger > SEFormatJPEG::ImageJPEG::m_logger [private]

logger

Definition at line 39 of file imagejpeg.h.

Referenced by saveToDir().

quint16 SEFormatJPEG::ImageJPEG::m_nbBits [private]

number of pixel to hide into one block

Definition at line 42 of file imagejpeg.h.

QString SEFormatJPEG::ImageJPEG::m_passphrase [private]

passphrase for random stegotable

Definition at line 46 of file imagejpeg.h.

int SEFormatJPEG::ImageJPEG::m_quality [private]

JPEG compression quality.

Reimplemented from SilentEyeFramework::Image.

Definition at line 48 of file imagejpeg.h.

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

modules/seformatjpeg/imagejpeg.h
modules/seformatjpegold/seformatjpeg/imagejpeg.h
modules/seformatjpeg/imagejpeg.cpp
modules/seformatjpegold/seformatjpeg/imagejpeg.cpp

SEFormatJPEG::ImageJPEG Class Reference

Public Types

Public Member Functions

Private Member Functions

Private Attributes

Detailed Description

Member Enumeration Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation