SoRadialGradientCenteredProcessing2d Class Reference
[Gradient]

SoRadialGradientCenteredProcessing2d engine More...

#include <ImageViz/Engines/EdgeDetection/Gradient/SoRadialGradientCenteredProcessing2d.h>

Inheritance diagram for SoRadialGradientCenteredProcessing2d:

Public Types
enum	ProjectionMode { GRADIENT_NORMAL = 0, GRADIENT_NORMAL_TANGENTIAL = 1 }
Public Member Functions
	SoRadialGradientCenteredProcessing2d ()
Public Attributes
SoSFImageDataAdapter	inGradientXImage
SoSFImageDataAdapter	inGradientYImage
SoSFVec2i32	projectionCenter
SoSFEnum	projectionMode
SoImageVizEngineOutput < SoSFImageDataAdapter, SoImageDataAdapter * >	outNormalImage
SoImageVizEngineOutput < SoSFImageDataAdapter, SoImageDataAdapter * >	outTangentImage

Detailed Description

SoRadialGradientCenteredProcessing2d engine

The SoRadialGradientCenteredProcessing2d engine performs a projected gradient computing the directional vector.

For an introduction, see:

In the continuous 2-D case, for a given pixel $x$ and knowing the gradient $Gx$ and $Gy$ , the projected gradient of an image $I(x)$ is defined along the unitary vector $U(u,v)$ , as :

$G_p=Gx\times u + Gy\times v, ~with~ U(u,v)=\frac{\overrightarrow{x-p} }{\left \| x-p \right \|}$

The SoRadialGradientCenteredProcessing2d performs a projected gradient computing the directional vector from a single given center. For all pixel $x$ in the image, $p$ is the center.

It is a common way to get the recursive gradient in X and Y directions for input image $Gx$ and $Gy$ , using a spread of 60.

The projected resulting gradient image is the Normal Gradient. Simultaneously, the tangential gradient could be computed with the option GRADIENT_NORMAL_TANGENTIAL of ProjectionMode

FILE FORMAT/DEFAULT

inGradientXImage	NULL
inGradientYImage	NULL
projectionCenter	0 0
projectionMode	GRADIENT_NORMAL

Library references: pgradient_centered2d

Member Enumeration Documentation

enum SoRadialGradientCenteredProcessing2d::ProjectionMode

Enumerator:

GRADIENT_NORMAL

The engine computes the normal gradient.

Only the outNormalImage output is set using this mode.

GRADIENT_NORMAL_TANGENTIAL

The engine computes the normal and tangential gradients.

Both outNormalImage and outTangentImage outputs are set using this mode.

Constructor & Destructor Documentation

SoRadialGradientCenteredProcessing2d::SoRadialGradientCenteredProcessing2d ( )

Constructor.

Member Data Documentation

SoSFImageDataAdapter SoRadialGradientCenteredProcessing2d::inGradientXImage

The input X-gradient image.

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

SoSFImageDataAdapter SoRadialGradientCenteredProcessing2d::inGradientYImage

The input Y-gradient image.

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

SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter*> SoRadialGradientCenteredProcessing2d::outNormalImage

The output normal gradient image.

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

SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter*> SoRadialGradientCenteredProcessing2d::outTangentImage

The output tangent gradient image.

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

SoSFVec2i32 SoRadialGradientCenteredProcessing2d::projectionCenter

The center of projection coordinates.

Default value is SbVec2i32(0,0).

SoSFEnum SoRadialGradientCenteredProcessing2d::projectionMode

Select the output images mode.

Use enum ProjectionMode. Default is GRADIENT_NORMAL

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

ImageViz/Engines/EdgeDetection/Gradient/SoRadialGradientCenteredProcessing2d.h

SoRadialGradientCenteredProcessing2d Class Reference [Gradient]

Public Types

Public Member Functions