SoRotateProcessing2d image filter More...

#include <ImageViz/Engines/GeometryAndMatching/GeometricTransforms/SoRotateProcessing2d.h>

Inheritance diagram for SoRotateProcessing2d:

Public Types
enum	PrecisionMode { NEARBY_PIXEL = 0 , INTERPOLATION = 1 }
	Method used to calculate the intensity of each result pixel. More...

Public Types inherited from SoImageVizEngine
enum	ComputeMode { MODE_2D = 0 , MODE_3D = 1 , MODE_AUTO = 2 }
	Compute Mode This enum specifies whether the main input will be interpreted as a 3D volume or a stack of 2D images for processing. More...

enum	Neighborhood3d { CONNECTIVITY_6 = 0 , CONNECTIVITY_18 = 1 , CONNECTIVITY_26 = 2 }
	Neighborhood Connectivity 3D. More...

Public Member Functions
	SoRotateProcessing2d ()
	Constructor.

Public Member Functions inherited from SoImageVizEngine
virtual SoType	getTypeId () const
	Returns the type identifier for this specific instance.

virtual void	startEvaluate ()
	Evaluate engine and dependencies in another thread without blocking the current one.

virtual void	waitEvaluate ()
	Wait for the end of engine evaluation.

virtual void	abortEvaluate ()
	Abort current processing as soon as possible.

virtual bool	isEvaluating ()
	Returns true if the engine evaluation is in progress.

Public Member Functions inherited from SoEngine
virtual int	getOutputs (SoEngineOutputList &list) const
	Returns a list of outputs in this engine.

SoEngineOutput *	getOutput (const SbName &outputName) const
	Returns a reference to the engine output with the given name.

SbBool	getOutputName (const SoEngineOutput *output, SbName &outputName) const
	Returns (in outputName) the name of the engine output (output).

SoEngine *	copy () const
	Creates and returns an exact copy of the engine.

Public Member Functions inherited from SoFieldContainer
void	setToDefaults ()
	Sets all fields in this object to their default values.

SbBool	hasDefaultValues () const
	Returns TRUE if all of the object's fields have their default values.

SbBool	fieldsAreEqual (const SoFieldContainer *fc) const
	Returns TRUE if this object's fields are exactly equal to fc's fields.

void	copyFieldValues (const SoFieldContainer *fc, SbBool copyConnections=FALSE)
	Copies the contents of fc's fields into this object's fields.

SoNONUNICODE SbBool	set (const char *fieldDataString)
	Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.

SbBool	set (const SbString &fieldDataString)
	Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.

void	get (SbString &fieldDataString)
	Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.

virtual int	getFields (SoFieldList &list) const
	Appends references to all of this object's fields to resultList, and returns the number of fields appended.

virtual int	getAllFields (SoFieldList &list) const
	Returns a list of fields, including the eventIn's and eventOut's.

virtual SoField *	getField (const SbName &fieldName) const
	Returns a the field of this object whose name is fieldName.

virtual SoField *	getEventIn (const SbName &fieldName) const
	Returns a the eventIn with the given name.

virtual SoField *	getEventOut (const SbName &fieldName) const
	Returns the eventOut with the given name.

SbBool	getFieldName (const SoField *field, SbName &fieldName) const
	Returns the name of the given field in the fieldName argument.

SbBool	enableNotify (SbBool flag)
	Notification at this Field Container is enabled (if flag == TRUE) or disabled (if flag == FALSE).

SbBool	isNotifyEnabled () const
	Notification is the process of telling interested objects that this object has changed.

virtual void	setUserData (void *data)
	Sets application data.

void *	getUserData (void) const
	Gets user application data.

Public Member Functions inherited from SoBase
virtual void	touch ()
	Marks an instance as modified, simulating a change to it.

virtual SbName	getName () const
	Returns the name of an instance.

virtual void	setName (const SbName &name)
	Sets the name of an instance.

void	setSynchronizable (const bool b)
	Sets this to be a ScaleViz synchronizable object.

bool	isSynchronizable () const
	Gets the ScaleViz synchronizable state of this object.

Public Member Functions inherited from SoRefCounter
void	ref () const
	Adds a reference to an instance.

void	unref () const
	Removes a reference from an instance.

void	unrefNoDelete () const
	unrefNoDelete() should be called when it is desired to decrement the reference count, but not delete the instance if this brings the reference count to zero.

int	getRefCount () const
	Returns current reference count.

void	lock () const
	lock this instance.

void	unlock () const
	unlock this instance.

Public Member Functions inherited from SoTypedObject
SbBool	isOfType (const SoType &type) const
	Returns TRUE if this object is of the type specified in type or is derived from that type.

template<typename TypedObjectClass >
SbBool	isOfType () const
	Returns TRUE if this object is of the type of class TypedObjectClass or is derived from that class.

Public Attributes
SoSFImageDataAdapter	inImage
	The input image.

SoSFVec2i32	rotationCenter
	The rotation center coordinates.

SoSFFloat	rotationAngle
	The angle of the rotation in degrees (not radians).

SoSFEnum	precisionMode
	Select the interpolation mode.

SoImageVizEngineOutput< SoSFImageDataAdapter, SoImageDataAdapter * >	outImage
	The output image.

Public Attributes inherited from SoImageVizEngine
SbEventHandler< EventArg & >	onBegin
	Event raised when the processing begins.

SbEventHandler< EventArg & >	onEnd
	Event raised when processing ends and the result is available.

SbEventHandler< EventArg & >	onProgress
	Event raised while processing is running.

Additional Inherited Members
Static Public Member Functions inherited from SoImageVizEngine
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Static Public Member Functions inherited from SoEngine
static SoType	getClassTypeId ()
	Returns the type identifier for the SoEngine class.

static SoEngine *	getByName (const SbName &name)
	Looks up engine(s) by name.

static int	getByName (const SbName &name, SoEngineList &list)
	Looks up engine(s) by name.

Static Public Member Functions inherited from SoFieldContainer
static SoType	getClassTypeId ()
	Returns the type of this class.

Static Public Member Functions inherited from SoBase
static SoType	getClassTypeId ()
	Returns type identifier for this class.

Static Public Member Functions inherited from SoTypedObject
static SoType	getClassTypeId ()
	Returns the type identifier for this class.

Detailed Description

SoRotateProcessing2d image filter

The SoRotateProcessing2d filter performs a rotation of an image by a user-defined angle $\theta$ and an origin $O$ . The new coordinates $(x', y')$ can be expressed as a function of the old coordinates $(x, y)$ :

$\left\{\begin{matrix}x'&=&(x-x_0)\cdot\cos\theta - (y-y_0)\cdot\sin\theta + x_0\\ y'&=&(x-x_0)\cdot\sin\theta + (y-y_0)\cdot\cos\theta + y_0\end{matrix}\right\}$

where $(x_0,y_0)$ are the coordinates of the center of the rotation. Or in a matrix notation:

$\begin{bmatrix}x'\\y'\end{bmatrix} = \begin{bmatrix}\cos\theta&-\sin\theta\\\sin\theta&\cos\theta\end{bmatrix} \cdot\begin{bmatrix}x-x_0\\y-y_0\end{bmatrix} + \begin{bmatrix}x_0\\y_0\end{bmatrix}$

Once again, destination pixels may be outside the image, and normally these pixels are ignored. Furthermore, the $(x, y)$ coordinates obtained are not always integers, even though an image is a discrete space. The figure below illustrates the grid of the resultant image, the point $M'$ being a pixel in this image. The points are generated from the rotation of the original image and do not fit on the grid.

Figure 1: Rotation

To calculate the intensity of each pixel $M'$ , two methods are possible:

Take the grey level of the nearest neighbor. For the above example would be given the intensity of
Take into account the four nearest neighbors and calculate the grey level based on the average of the four points, weighted by their distance, as in:
$g'=\frac{f_1\times g'_1+f_2\times g'_2+f_3\times g'_3+f_4\times g'_4}{f_1+f_2+f_3+f_4}$

If $d_j$ denotes the distance $M'_j M'$ , $f_i$ is defined as:

$f_i=\prod_{\substack{j=1\\j\neq i}}^{j=4}d_j$

e.g. $f_1=d_2d_3d_4$ .

The choice of the $f_i$ 's ensures that the interpolated value is equal to $g'_j$ if $M'$ matches $M'_j$ . This method gives better results but requires more computation time.

NOTE: In SoRotateProcessing2d filter, the image is perceived as a cylinder, where the information outside the image area wraps around and is placed in the blank part.

FILE FORMAT/DEFAULT

inImage	NULL
rotationCenter	0 0
rotationAngle	10.0f
precisionMode	NEARBY_PIXEL

Library references: rotate

Definition at line 93 of file SoRotateProcessing2d.h.

Member Enumeration Documentation

◆ PrecisionMode

enum SoRotateProcessing2d::PrecisionMode

Method used to calculate the intensity of each result pixel.

Enumerator
NEARBY_PIXEL	Take the grey level of the nearest pixel.
INTERPOLATION	Take the bilinear interpolation from the four nearest pixels.

Definition at line 115 of file SoRotateProcessing2d.h.

Constructor & Destructor Documentation

◆ SoRotateProcessing2d()

SoRotateProcessing2d::SoRotateProcessing2d ( )

Constructor.

Member Data Documentation

◆ inImage

SoSFImageDataAdapter SoRotateProcessing2d::inImage

The input image.

Default value is NULL. Supported types include: grayscale binary label color image.

Definition at line 103 of file SoRotateProcessing2d.h.

◆ outImage

SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter*> SoRotateProcessing2d::outImage

The output image.

Default value is NULL. Supported types include: grayscale binary label color image.

Definition at line 132 of file SoRotateProcessing2d.h.

◆ precisionMode

SoSFEnum SoRotateProcessing2d::precisionMode

Select the interpolation mode.

Use enum PrecisionMode. Default is NEARBY_PIXEL

Definition at line 129 of file SoRotateProcessing2d.h.

◆ rotationAngle

SoSFFloat SoRotateProcessing2d::rotationAngle

The angle of the rotation in degrees (not radians).

Default value is 10.0f.

Definition at line 109 of file SoRotateProcessing2d.h.

◆ rotationCenter

SoSFVec2i32 SoRotateProcessing2d::rotationCenter

The rotation center coordinates.

Default value is SbVec2i32(0,0).

Definition at line 106 of file SoRotateProcessing2d.h.

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

ImageViz/Engines/GeometryAndMatching/GeometricTransforms/SoRotateProcessing2d.h

Open Inventor Release 2023.2.3

Public Types

Public Member Functions

Public Attributes

Additional Inherited Members