org.dcm4che3.imageio.codec

Class Decompressor

java.lang.Object

org.dcm4che3.imageio.codec.Decompressor

public class Decompressor
extends Object

Decompresses the pixel data of compressed DICOM images to the native (uncompressed) format.

Author:

Gunter Zeilinger , Hermann Czedik-Eysenberg

Field Summary

Fields

Modifier and Type	Field and Description
private Attributes	dataset
private BufferedImage	decompressedImage
private ImageParams	imageParams
private ImageReader	imageReader
private static Logger	LOG
private PatchJPEGLS	patchJPEGLS
private Object	pixels
private ImageReadParam	readParam
private TransferSyntaxType	tsType
private String	tsuid

Constructor Summary

Constructors

Constructor and Description
Decompressor(Attributes dataset, String tsuid)

Method Summary

Modifier and Type	Method and Description
private void	close(ImageInputStream iis)
ImageInputStream	createImageInputStream()
ImageInputStream	createImageInputStream(int frameIndex)
boolean	decompress()
static boolean	decompress(Attributes dataset, String tsuid)
protected BufferedImage	decompressFrame(ImageInputStream iis, int index)
void	dispose()
long	getEstimatedNeededMemory()
void	writeFrameTo(ImageInputStream iis, int frameIndex, OutputStream out)
void	writeTo(OutputStream out)

Methods inherited from class java.lang.Object

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

Field Detail

LOG

private static final Logger LOG

dataset

private final Attributes dataset

pixels

private Object pixels

tsuid

private final String tsuid

tsType

private final TransferSyntaxType tsType

imageParams

private ImageParams imageParams

decompressedImage

private BufferedImage decompressedImage

imageReader

private ImageReader imageReader

readParam

private ImageReadParam readParam

patchJPEGLS

private PatchJPEGLS patchJPEGLS

Constructor Detail

Decompressor

public Decompressor(Attributes dataset,
                    String tsuid)

Method Detail

dispose

public void dispose()

decompress

public boolean decompress()

decompress

public static boolean decompress(Attributes dataset,
                                 String tsuid)

writeTo

public void writeTo(OutputStream out)
             throws IOException

Throws:

IOException

close

private void close(ImageInputStream iis)

writeFrameTo

public void writeFrameTo(ImageInputStream iis,
                         int frameIndex,
                         OutputStream out)
                  throws IOException

Throws:

IOException

decompressFrame

protected BufferedImage decompressFrame(ImageInputStream iis,
                                        int index)
                                 throws IOException

Throws:

IOException

createImageInputStream

public ImageInputStream createImageInputStream()
                                        throws IOException

Throws:

IOException

createImageInputStream

public ImageInputStream createImageInputStream(int frameIndex)
                                        throws IOException

Throws:

IOException

getEstimatedNeededMemory

public long getEstimatedNeededMemory()

Returns:

(Pessimistic) estimation of the maximum heap memory (in bytes) that will be needed at any moment in time during decompression.