org.dicom4j.images.transforms
Class VOITransform

java.lang.Object
  org.dicom4j.images.transforms.VOITransform

public class VOITransform
extends Object

A transformation constructed from a DICOM attribute list that extracts those attributes that define the VOI LUT transformation, specifically the window center and width attributes.

Looks first for a per-frame functional group FrameVOILUTSequence then looks in the shared functional groups, otherwise tries to find the Window Center and Width values in the top level of the dataset.

Note that multiple transformations (for each frame) may be present and are supported (specifically, Window Center and Width are multi-valued attributes).

Does not currently support a LUT in the VOI LUT Sequence, only linear window values.

Author:

dclunie

Constructor Summary

VOITransform(DataSet list)

Method Summary

double	getCenter(int frame, int transform) Get the window center of the particular transform available for a particular frame.
int	getNumberOfTransforms(int frame) Get the number of transforms available for a particular frame.
double	getWidth(int frame, int transform) Get the window width of the particular transform available for a particular frame.
String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

VOITransform

public VOITransform(DataSet list)

Parameters:

list -

Method Detail

getNumberOfTransforms

public int getNumberOfTransforms(int frame)

Get the number of transforms available for a particular frame.

Parameters:

frame - numbered from zero; needed to select which transform if frame-specific

Returns:

the number of transforms available for the frame, 0 if none

getWidth

public double getWidth(int frame,
                       int transform)

Get the window width of the particular transform available for a particular frame.

Parameters:

frame - numbered from zero; needed to select which transform if frame-specific

transform - numbered from zero; needed to select which transform if more than one for that frame

Returns:

the window width, or 0 if none

getCenter

public double getCenter(int frame,
                        int transform)

Get the window center of the particular transform available for a particular frame.

Parameters:

frame - numbered from zero; needed to select which transform if frame-specific

transform - numbered from zero; needed to select which transform if more than one for that frame

Returns:

the window center, or 0 if none

toString

public final String toString()

Overrides:

toString in class Object