djutils.h File Reference

type definitions and constants for the dcmjpeg module More...

Classes
class	DcmJpegHelper
	helper class with static methods used from different dcmjpeg classes (in particular from the encoder and the decoder part). More...

Enumerations
enum	EJ_Mode {   EJM_baseline , EJM_sequential , EJM_spectralSelection , EJM_progressive ,   EJM_lossless }
	describes the different modes of operation of a JPEG codec More...
enum	E_SubSampling { ESS_444 , ESS_422 , ESS_411 }
	describes the different types of component sub-sampling to be used with lossy image compression. More...
enum	E_UIDCreation { EUC_default , EUC_always , EUC_never }
	describes the condition under which a compressed or decompressed image receives a new SOP instance UID. More...
enum	E_PlanarConfiguration { EPC_default , EPC_colorByPixel , EPC_colorByPlane }
	describes how the decoder should handle planar configuration of decompressed color images. More...
enum	E_CompressionColorSpaceConversion { ECC_lossyYCbCr , ECC_lossyRGB , ECC_monochrome }
	describes how color space conversion should be handled during the conversion of an uncompressed DICOM image to a JPEG-compressed image More...
enum	E_DecompressionColorSpaceConversion {   EDC_photometricInterpretation , EDC_lossyOnly , EDC_always , EDC_never ,   EDC_guessLossyOnly , EDC_guess }
	describes how color space conversion should be handled during the conversion of a JPEG-compressed DICOM image to an uncompressed image More...

Variables
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_Suspension
	IJG codec suspension return.
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_IJG8_FrameBufferTooSmall
	Buffer for decompressed image (8 bits/sample) too small.
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_IJG12_FrameBufferTooSmall
	Buffer for decompressed image (12 bits/sample) too small.
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_IJG16_FrameBufferTooSmall
	Buffer for decompressed image (16 bits/sample) too small.
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_UnsupportedPhotometricInterpretation
	Codec does not support this PhotometricInterpretation.
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_UnsupportedColorConversion
	Codec does not support this kind of color conversion.
DCMTK_DCMJPEG_EXPORT const OFConditionConst	EJ_UnsupportedBitDepth
	Codec does not support this kind of bit depth.

Detailed Description

type definitions and constants for the dcmjpeg module

Enumeration Type Documentation

E_CompressionColorSpaceConversion

enum E_CompressionColorSpaceConversion

describes how color space conversion should be handled during the conversion of an uncompressed DICOM image to a JPEG-compressed image

Enumerator
ECC_lossyYCbCr	encode color images in YCbCr if lossy JPEG. If lossless JPEG, images are encoded as RGB unless the source image is YCbCr in which case no color conversion is performed.
ECC_lossyRGB	encode color images in RGB unless the source image is YCbCr in which case no color conversion is performed.
ECC_monochrome	convert color images to monochrome before compressing

E_DecompressionColorSpaceConversion

enum E_DecompressionColorSpaceConversion

describes how color space conversion should be handled during the conversion of a JPEG-compressed DICOM image to an uncompressed image

Enumerator
EDC_photometricInterpretation	perform color space conversion from YCbCr to RGB if DICOM photometric interpretation indicates YCbCr.
EDC_lossyOnly	always perform color space conversion from YCbCr to RGB if JPEG data is color image and compression is lossy.
EDC_always	always perform color space conversion from YCbCr to RGB if JPEG data is color image.
EDC_never	never perform any color space conversion.
EDC_guessLossyOnly	perform color space conversion from YCbCr to RGB if JPEG data is color image, compression is lossy, and the underlying JPEG library "guesses" the color space to be YCbCr.
EDC_guess	perform color space conversion from YCbCr to RGB if JPEG data is color image, and the underlying JPEG library "guesses" the color space to be YCbCr.

E_PlanarConfiguration

enum E_PlanarConfiguration

describes how the decoder should handle planar configuration of decompressed color images.

Enumerator
EPC_default	automatically determine whether color-by-plane is required from the SOP Class UID and decompressed photometric interpretation
EPC_colorByPixel	always create color-by-pixel planar configuration
EPC_colorByPlane	always create color-by-plane planar configuration

E_SubSampling

enum E_SubSampling

describes the different types of component sub-sampling to be used with lossy image compression.

Enumerator
ESS_444	4:4:4 sampling (no subsampling)
ESS_422	4:2:2 sampling (horizontal subsampling of chroma components)
ESS_411	4:1:1 sampling (horizontal and vertical subsampling of chroma components)

E_UIDCreation

enum E_UIDCreation

describes the condition under which a compressed or decompressed image receives a new SOP instance UID.

Enumerator
EUC_default	Upon compression, assign new SOP instance UID if compression is lossy. Upon decompression never assign new SOP instance UID.
EUC_always	always assign new SOP instance UID on compression and decompression
EUC_never	never assign new SOP instance UID

EJ_Mode

enum EJ_Mode

describes the different modes of operation of a JPEG codec

Enumerator
EJM_baseline	JPEG baseline.
EJM_sequential	JPEG extended sequential.
EJM_spectralSelection	JPEG spectral selection.
EJM_progressive	JPEG full progression.
EJM_lossless	JPEG lossless.