DJEncoderProgressive Class Reference

Encoder class for JPEG Progressive (lossy, 8/12-bit) More...

Inheritance diagram for DJEncoderProgressive:

List of all members.

Public Member Functions
	DJEncoderProgressive ()
	default constructor
virtual	~DJEncoderProgressive ()
	destructor
virtual E_TransferSyntax	supportedTransferSyntax () const
	returns the transfer syntax that this particular codec is able to encode and decode.
Private Member Functions
virtual OFBool	isLosslessProcess () const
	returns true if the transfer syntax supported by this codec is lossless.
virtual void	createDerivationDescription (const DcmRepresentationParameter *toRepParam, const DJCodecParameter *cp, Uint8 bitsPerSample, double ratio, OFString &derivationDescription) const
	creates 'derivation description' string after encoding.
virtual DJEncoder *	createEncoderInstance (const DcmRepresentationParameter *toRepParam, const DJCodecParameter *cp, Uint8 bitsPerSample) const
	creates an instance of the compression library to be used for encoding/decoding.

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Detailed Description

Encoder class for JPEG Progressive (lossy, 8/12-bit)

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Member Function Documentation

virtual void DJEncoderProgressive::createDerivationDescription	(	const DcmRepresentationParameter *	toRepParam,
		const DJCodecParameter *	cp,
		Uint8	bitsPerSample,
		double	ratio,
		OFString &	derivationDescription
	)		const [private, virtual]

creates 'derivation description' string after encoding.

Parameters:

toRepParam	representation parameter passed to encode()
cp	codec parameter passed to encode()
bitsPerSample	bits per sample of the original image data prior to compression
ratio	image compression ratio. This is not the "quality factor" but the real effective ratio between compressed and uncompressed image, i. e. 30 means a 30:1 lossy compression.
imageComments	image comments returned in this parameter which is initially empty

Implements DJCodecEncoder.

virtual DJEncoder* DJEncoderProgressive::createEncoderInstance	(	const DcmRepresentationParameter *	toRepParam,
		const DJCodecParameter *	cp,
		Uint8	bitsPerSample
	)		const [private, virtual]

creates an instance of the compression library to be used for encoding/decoding.

Parameters:

toRepParam	representation parameter passed to encode()
cp	codec parameter passed to encode()
bitsPerSample	bits per sample for the image data

Returns:

pointer to newly allocated codec object

Implements DJCodecEncoder.

virtual OFBool DJEncoderProgressive::isLosslessProcess

(

)

const [private, virtual]

returns true if the transfer syntax supported by this codec is lossless.

Returns:

lossless flag

Implements DJCodecEncoder.

virtual E_TransferSyntax DJEncoderProgressive::supportedTransferSyntax

(

)

const [virtual]

returns the transfer syntax that this particular codec is able to encode and decode.

Returns:

supported transfer syntax

Implements DJCodecEncoder.

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

• dcmjpeg/include/dcmtk/dcmjpeg/djencpro.h