DiJPEGPlugin Class Reference

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

Inheritance diagram for DiJPEGPlugin:

DiPluginFormat List of all members.

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)
void setQuality (const unsigned int quality)
 set quality value for JPEG compression
void setSampling (const E_SubSampling sampling)
 set (sub) sampling for JPEG compression.
void outputMessage (void *arg) const
 callback function used to report IJG warning messages and the like.

Static Public Member Functions

static OFString getLibraryVersionString ()
 get version information of the TIFF library.

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

Detailed Description

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

Definition at line 56 of file dipijpeg.h.

Member Function Documentation

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

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

void DiJPEGPlugin::setQuality (  const unsigned int  quality  ) 
 

set quality value for JPEG compression

Parameters:
quality quality value (0..100, in percent)

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)

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.

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

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