com.archimed.dicom.converters

Class JPEGLosslessFrameConverterOp

java.lang.Object

com.archimed.dicom.converters.BaseFrameConverterOp

com.archimed.dicom.converters.JPEGLosslessFrameConverterOp

All Implemented Interfaces:

FrameConverterOp

public class JPEGLosslessFrameConverterOp
extends BaseFrameConverterOp

FrameConverterOp implementation that is able to converted multi-frame unencapsulated images to JPEGLossless encapsulation (JPEG_14_SelectionValue1). It uses Compression.

Constructor Summary

Constructors

Constructor and Description
JPEGLosslessFrameConverterOp()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	canConvert(DicomObject dcm) Implementors must indicate this FrameConverterOp can be applied to the specified dicom image.
byte[]	convert(byte[] frame, ImageInfo imageInfo) converts a frame.
long	getConvertedPixelDataLength(DicomObject dcm, long originalPixelDataLength, int originalType) encapsulated pixel data always has undefined length
int	getConvertedPixelDataType(DicomObject dcm, long originalPixelDataLength, int originalType) encapsulated pixel data is always OB
TransferSyntaxUID	getConvertedTransferSyntax(DicomObject dcm) returns the new transfer syntax of the image to which this frame conversion operation has been applied Eg: If the operation compresses frames according to a particular codec, then the encapsulated transfer syntax corresponding to this transfer syntax should be returned.

Methods inherited from class com.archimed.dicom.converters.BaseFrameConverterOp

modifyDicomObject

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JPEGLosslessFrameConverterOp

public JPEGLosslessFrameConverterOp()

Method Detail

canConvert

public boolean canConvert(DicomObject dcm)

Description copied from interface: FrameConverterOp

Implementors must indicate this FrameConverterOp can be applied to the specified dicom image. The specified dicom image will contain all data elements of the image 'before' the pixel data.

Parameters:

dcm - the source DicomObject (read up until the pixeldata data element)

Returns:

true if conversion is possible

getConvertedTransferSyntax

public TransferSyntaxUID getConvertedTransferSyntax(DicomObject dcm)

Description copied from interface: FrameConverterOp

returns the new transfer syntax of the image to which this frame conversion operation has been applied Eg: If the operation compresses frames according to a particular codec, then the encapsulated transfer syntax corresponding to this transfer syntax should be returned.

Parameters:

dcm - the source DicomObject (read up until the pixeldata data element)

Returns:

the transfer syntax of the converted DicomObject

convert

public byte[] convert(byte[] frame,
             ImageInfo imageInfo)

Description copied from interface: FrameConverterOp

converts a frame. Note: this must be changed to a method capable of handling ByteArray arguments if we need to support images larger than 2^31 bytes.

Parameters:

frame - the source pixel frame

imageInfo - relevant information of the image

Returns:

the converted pixel frame

getConvertedPixelDataType

public int getConvertedPixelDataType(DicomObject dcm,
                            long originalPixelDataLength,
                            int originalType)
                              throws DicomException

encapsulated pixel data is always OB

Specified by:

getConvertedPixelDataType in interface FrameConverterOp

Overrides:

getConvertedPixelDataType in class BaseFrameConverterOp

Parameters:

dcm - the source dicom object

originalPixelDataLength - the original pixel data length of the source

originalType - the original vr type of the source pixel data

Returns:

the converted pixel data type

Throws:

DicomException - -

getConvertedPixelDataLength

public long getConvertedPixelDataLength(DicomObject dcm,
                               long originalPixelDataLength,
                               int originalType)
                                 throws DicomException

encapsulated pixel data always has undefined length

Specified by:

getConvertedPixelDataLength in interface FrameConverterOp

Overrides:

getConvertedPixelDataLength in class BaseFrameConverterOp

Parameters:

dcm - the source dicom object

originalPixelDataLength - the length of the pixel data of the source

originalType - the type of the pixel dataof the source

Returns:

DataElement.UNDEFINED_LENGTH_LONG

Throws:

DicomException - -