Package gov.nih.mipav.view

Class WindowLevel

java.lang.Object

gov.nih.mipav.view.WindowLevel

public class WindowLevel
extends java.lang.Object

The WindowLevel class provides mouse-driven window-level controls for the ModelLUT or ModelRGB lookup tables. The WindowLevel class can be used to attach mouse-control or any user-interface control to both the ModelLUT and ModelRGB classes.

See Also:

ViewJComponentEditImage.java, PlaneRender.java

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	doRelative	If true, window/level adjusted relative to the current transfer function values If false, window/level adjusted to the absolute image position values
private float[]	m_afXWin	Member variables used to adjust the window and level (contrast and brightness) by dragging with the right-mouse button:.
private float[]	m_afYWin	Member variables used to adjust the window and level (contrast and brightness) by dragging with the right-mouse button:.
private float	m_fAlpha	Default alpha blending value:
private float	m_fMax	image max value
private float	m_fMin	image min value
private float	m_fOldX	previous mouse x-position
private float	m_fOldY	previous mouse y-position
private float	old_fLevel
private float	old_fWindow

Constructor Summary

Constructors

Constructor	Description
WindowLevel()	Default constructor.

Method Summary

Modifier and Type	Method	Description
void	disposeLocal()	Clean memory.
float	getLevelValue()
float	getWindowValue()
private void	initWinLevelGray(ModelLUT kLUT, ModelImage kImage)	initWinLevelGray, initializes the ModelLUT for gray-scale images before window-level operations.
private void	initWinLevelRGB(ModelRGB kRGBT, ModelImage kImage)	initWinLevelRGB, initializes the ModelRGB for window-level changes.
void	setAlpha(float fAlpha)	Sets alpha for the notifyWindowDisplayListeners call
boolean	updateWinLevel(float fX, float fY, boolean bFirstUpdate, ModelStorageBase kLookupTable, ModelImage kImage)	updateWinLevel updates the window-level for the input lookup table based on two normalized parameters (fX, fY).
private void	updateWinLevelGray(ModelLUT kLUT, ModelImage kImage, float[] afXWin, float[] afYWin)	updateWinLevelGray, updates the ModelLUT with the new transfer function.
private void	updateWinLevelRGB(ModelRGB kRGBT, ModelImage kImage, float[] afXWin, float[] afYWin)	updateWinLevelRGB, updates the ModelRGB with the new transfer functions.
private void	winLevelGray(ModelLUT kLUT, ModelImage kImage)	winLevelGray finds old_fWindow and old_fLevel
private void	winLevelRGB(ModelRGB kRGBT, ModelImage kImage)	winLevelRGB finds old_fWindow and old_fLevel.

Methods inherited from class java.lang.Object

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

Field Detail

m_afXWin

private float[] m_afXWin

Member variables used to adjust the window and level (contrast and brightness) by dragging with the right-mouse button:.

m_afYWin

private float[] m_afYWin

Member variables used to adjust the window and level (contrast and brightness) by dragging with the right-mouse button:.

m_fMax

private float m_fMax

image max value

m_fMin

private float m_fMin

image min value

m_fOldX

private float m_fOldX

previous mouse x-position

m_fOldY

private float m_fOldY

previous mouse y-position

m_fAlpha

private float m_fAlpha

Default alpha blending value:

doRelative

private boolean doRelative

If true, window/level adjusted relative to the current transfer function values If false, window/level adjusted to the absolute image position values

old_fWindow

private float old_fWindow

old_fLevel

private float old_fLevel

Constructor Detail

WindowLevel

public WindowLevel()

Default constructor.

Method Detail

disposeLocal

public void disposeLocal()

Clean memory.

updateWinLevel

public boolean updateWinLevel(float fX,
                              float fY,
                              boolean bFirstUpdate,
                              ModelStorageBase kLookupTable,
                              ModelImage kImage)

updateWinLevel updates the window-level for the input lookup table based on two normalized parameters (fX, fY). These parameters may be derived from a normalized x,y mouse position, from slider values, or from any variable. In ViewJComponentEditImage and PlaneRender classesL If the right mouse button is pressed and dragged. updateWinLevel updates the HistoLUT window and level (contrast and brightness) for the ViewJComponentEditImage and PlaneRender classes. The input parameters fX and fY must be in normalized screen space (0-1).

Parameters:

fX - the normalized window parameter (0-1)

fY - the normalized level parameter (0-1)

bFirstUpdate - when true initialize the WindowLevel function

kLookupTable - either the ModelLUT or the ModelRGB being modified

kImage - the ModelImage the lookup table describes.

Returns:

true when the lookup table changes, false when no change

setAlpha

public void setAlpha(float fAlpha)

Sets alpha for the notifyWindowDisplayListeners call

Parameters:

fAlpha - the alpha value for blending between images. Needed to pass to the notifyWindowDisplayListeners function.

initWinLevelRGB

private void initWinLevelRGB(ModelRGB kRGBT,
                             ModelImage kImage)

initWinLevelRGB, initializes the ModelRGB for window-level changes. The transfer function is set to have four control points, and is reset to the default linear.

Parameters:

kRGBT - the ModelRGB to be initialized

kImage - the ModelImage that the min/max values are derived from for initializing the ModelRGB.

winLevelRGB

private void winLevelRGB(ModelRGB kRGBT,
                         ModelImage kImage)

winLevelRGB finds old_fWindow and old_fLevel.

Parameters:

kRGBT - the ModelRGB

kImage - the ModelImage

initWinLevelGray

private void initWinLevelGray(ModelLUT kLUT,
                              ModelImage kImage)

initWinLevelGray, initializes the ModelLUT for gray-scale images before window-level operations. The transfer function is set to have four control points, and is reset to the default linear.

Parameters:

kLUT - the ModelLUT to be initialized.

kImage - the ModelImage attached to kLUT

winLevelGray

private void winLevelGray(ModelLUT kLUT,
                          ModelImage kImage)

winLevelGray finds old_fWindow and old_fLevel

Parameters:

kLUT - the ModelLUT

kImage - the ModelImage attached to kLUT

updateWinLevelRGB

private void updateWinLevelRGB(ModelRGB kRGBT,
                               ModelImage kImage,
                               float[] afXWin,
                               float[] afYWin)

updateWinLevelRGB, updates the ModelRGB with the new transfer functions. Updates depend on the activation of the different rgb functions, so if the getROn returns false the red function is not updated.

Parameters:

kRGBT - the ModelRGB being updated

kImage - the ModelImage that the ModelRGB describes

afXWin - the x-transfer function

afYWin - the y-transfer function

updateWinLevelGray

private void updateWinLevelGray(ModelLUT kLUT,
                                ModelImage kImage,
                                float[] afXWin,
                                float[] afYWin)

updateWinLevelGray, updates the ModelLUT with the new transfer function.

Parameters:

kLUT - the ModelLUT being updated

kImage - the ModelImage that the ModelLUT describes

afXWin - the x-transfer function

afYWin - the y-transfer function

getWindowValue

public float getWindowValue()

getLevelValue

public float getLevelValue()