DJEncoderRegistration Class Reference

singleton class that registers encoders for all supported JPEG processes. More...

Static Public Member Functions
static void	registerCodecs (E_CompressionColorSpaceConversion pCompressionCSConversion=ECC_lossyYCbCr, E_UIDCreation pCreateSOPInstanceUID=EUC_default, OFBool pOptimizeHuffman=OFFalse, int pSmoothingFactor=0, int pForcedBitDepth=0, Uint32 pFragmentSize=0, OFBool pCreateOffsetTable=OFTrue, E_SubSampling pSampleFactors=ESS_422, OFBool pWriteYBR422=OFTrue, OFBool pConvertToSC=OFFalse, unsigned long pWindowType=0, unsigned long pWindowParameter=0, double pVoiCenter=0.0, double pVoiWidth=0.0, unsigned long pRoiLeft=0, unsigned long pRoiTop=0, unsigned long pRoiWidth=0, unsigned long pRoiHeight=0, OFBool pUsePixelValues=OFTrue, OFBool pUseModalityRescale=OFFalse, OFBool pAcceptWrongPaletteTags=OFFalse, OFBool pAcrNemaCompatibility=OFFalse, OFBool pRealLossless=OFTrue)
	registers encoders for all supported JPEG processes. More...
static void	cleanup ()
	deregisters encoders. More...

Static Private Attributes
static OFBool	registered
	flag indicating whether the encoders are already registered.
static DJCodecParameter *	cp
	pointer to codec parameter shared by all encoders
static DJEncoderBaseline *	encbas
	pointer to encoder for baseline JPEG
static DJEncoderExtended *	encext
	pointer to encoder for extended JPEG
static DJEncoderSpectralSelection *	encsps
	pointer to encoder for spectral selection JPEG
static DJEncoderProgressive *	encpro
	pointer to encoder for progressive JPEG
static DJEncoderP14SV1 *	encsv1
	pointer to encoder for lossless SV1 JPEG
static DJEncoderLossless *	enclol
	pointer to encoder for lossless JPEG

Detailed Description

singleton class that registers encoders for all supported JPEG processes.

Member Function Documentation

cleanup()

static void DJEncoderRegistration::cleanup ( )

static

deregisters encoders.

Attention: Must not be called while other threads might still use the registered codecs, e.g. because they are currently encoding DICOM data sets through dcmdata.

registerCodecs()

static void DJEncoderRegistration::registerCodecs ( E_CompressionColorSpaceConversion  pCompressionCSConversion = ECC_lossyYCbCr, E_UIDCreation  pCreateSOPInstanceUID = EUC_default, OFBool  pOptimizeHuffman = OFFalse, int  pSmoothingFactor = 0, int  pForcedBitDepth = 0, Uint32  pFragmentSize = 0, OFBool  pCreateOffsetTable = OFTrue, E_SubSampling  pSampleFactors = ESS_422, OFBool  pWriteYBR422 = OFTrue, OFBool  pConvertToSC = OFFalse, unsigned long  pWindowType = 0, unsigned long  pWindowParameter = 0, double  pVoiCenter = 0.0, double  pVoiWidth = 0.0, unsigned long  pRoiLeft = 0, unsigned long  pRoiTop = 0, unsigned long  pRoiWidth = 0, unsigned long  pRoiHeight = 0, OFBool  pUsePixelValues = OFTrue, OFBool  pUseModalityRescale = OFFalse, OFBool  pAcceptWrongPaletteTags = OFFalse, OFBool  pAcrNemaCompatibility = OFFalse, OFBool  pRealLossless = OFTrue  )

static

registers encoders for all supported JPEG processes.

If already registered, call is ignored unless cleanup() has been performed before.

Parameters

pCompressionCSConversion	color conversion mode for compression
pCreateSOPInstanceUID	mode for SOP Instance UID creation
pOptimizeHuffman	perform huffman table optimization for 8 bits/pixel compression?
pSmoothingFactor	smoothing factor for image compression, 0..100
pForcedBitDepth	forced bit depth for image compression, 0 (auto) or 8/12/16
pFragmentSize	maximum fragment size (in kbytes) for compression, 0 for unlimited.
pCreateOffsetTable	create offset table during image compression?
pSampleFactors	subsampling mode for lossy YCbCr color image compression
pWriteYBR422	flag indicating whether a compressed YBR color stream should be marked as YBR_FULL_422 (if true) or YBR_FULL (if false) on DICOM level
pConvertToSC	flag indicating whether image should be converted to Secondary Capture upon compression
pWindowType	mode for VOI transformation of monochrome images
pWindowParameter	parameter for VOI transform of monochrome images, used in modes 1, 2, 4, 6
pVoiCenter	VOI window center for mode 5
pVoiWidth	VOI window width for mode 5
pRoiLeft	Region of Interest left corner for for VOI transform of monochrome images, mode 7
pRoiTop	Region of Interest upper corner for for VOI transform of monochrome images, mode 7
pRoiWidth	Region of Interest width for for VOI transform of monochrome images, mode 7
pRoiHeight	Region of Interest height for for VOI transform of monochrome images, mode 7
pUsePixelValues	Check smallest and largest pixel value and optimize compression, mode 0 only
pUseModalityRescale	Create Rescale Slope/Intercept to scale back to original pixel range, mode 0 only
pAcceptWrongPaletteTags	Accept wrong palette attribute tags (only "pseudo lossless" encoder)
pAcrNemaCompatibility	Accept old ACR-NEMA images without photometric interpretation (only "pseudo lossless" encoder)
pRealLossless	Enables true lossless compression (replaces old "pseudo" lossless encoders)

---

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

• dcmjpeg/include/dcmtk/dcmjpeg/djencode.h