DiJPEGPlugin Class Reference

Implementation of a JPEG plugin for the dcmimgle/dcmimage library. More...

Inheritance diagram for DiJPEGPlugin:

Public Member Functions
	DiJPEGPlugin ()
	constructor
virtual	~DiJPEGPlugin ()
	destructor
virtual int	write (DiImage *image, FILE *stream, const unsigned long frame=0) const
	write given image to a file stream (JPEG format) More...
void	setQuality (const unsigned int quality)
	set quality value for JPEG compression More...
void	setSampling (const E_SubSampling sampling)
	set (sub) sampling for JPEG compression. More...
void	outputMessage (void *arg) const
	callback function used to report IJG warning messages and the like. More...
Public Member Functions inherited from DiPluginFormat
virtual	~DiPluginFormat ()
	destructor (virtual)
virtual int	write (DiImage *image, FILE *stream, const unsigned long frame=0) const =0
	write given image to a file stream (abstract) More...

Static Public Member Functions
static OFString	getLibraryVersionString ()
	get version information of the TIFF library. More...

Private Attributes
unsigned int	Quality
	quality value (0..100, in percent), default: 75
E_SubSampling	Sampling
	(sub) sampling: ESS_444, ESS_422 (default), ESS_411

Additional Inherited Members
Protected Member Functions inherited from DiPluginFormat
	DiPluginFormat ()
	constructor (protected)

Detailed Description

Implementation of a JPEG plugin for the dcmimgle/dcmimage library.

Member Function Documentation

getLibraryVersionString()

static OFString DiJPEGPlugin::getLibraryVersionString ( )

static

get version information of the TIFF library.

Typical output format: "IJG, Version 6b 27-Mar-1998 (modified)"

Returns

name and version number of the TIFF library

outputMessage()

void DiJPEGPlugin::outputMessage

(

void *

arg

)

const

callback function used to report IJG warning messages and the like.

Should not be called by user code directly.

Parameters

arg	opaque pointer to JPEG compress structure

setQuality()

void DiJPEGPlugin::setQuality

(

const unsigned int

quality

)

set quality value for JPEG compression

Parameters

quality

quality value (0..100, in percent)

setSampling()

void DiJPEGPlugin::setSampling

(

const E_SubSampling

sampling

)

set (sub) sampling for JPEG compression.

Only used for color images. ESS_444 means no sub-sampling, ESS_422 horizontal subsampling of chroma components and ESS_422 horizontal and vertical subsampling of chroma components.

Parameters

sampling

sampling (valid values: ESS_444, ESS_422 or ESS_411)

write()

virtual int DiJPEGPlugin::write ( DiImage *  image, FILE *  stream, const unsigned long  frame = 0  ) const

virtual

write given image to a file stream (JPEG format)

Parameters

image	pointer to DICOM image object to be written
stream	stream to which the image is written (open in binary mode!)
frame	index of frame used for output (default: first frame = 0)

Returns

true if successful, false otherwise

Implements DiPluginFormat.

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

• dcmjpeg/include/dcmtk/dcmjpeg/dipijpeg.h