SoHessianMatrixProcessing3d Class Reference
[Other Derivatives]

SoHessianMatrixProcessing3d engine computes the local Hessian matrix More...

#include <ImageViz/Engines/EdgeDetection/OtherDerivatives/SoHessianMatrixProcessing3d.h>

Inheritance diagram for SoHessianMatrixProcessing3d:

List of all members.

Public Member Functions
	SoHessianMatrixProcessing3d ()
Public Attributes
SoSFImageDataAdapter	inImage
SoSFVec3f	standardDeviation
SoImageVizEngineOutput < SoSFImageDataAdapter, SoImageDataAdapter * >	outSymmetricMatrixImage

---

Detailed Description

SoHessianMatrixProcessing3d engine computes the local Hessian matrix

The SoHessianMatrixProcessing3d engines computes the local Hessian matrix by convolving the input image with the 2nd order derivatives of a Gaussian Kernel.

Each channel of the Hessian matrix represents a second order partial derivative.

For instance, , .

This filter provides an output spectral image where each channel represents a 2nd order derivative set in the following order , , , , , .

In order to extract the eigenvalues or vectors of the Hessian image the SoEigenDecompositionProcessing3d can be applied on the spectral image output.

SEE ALSO

SoGaussianDerivativeProcessing, SoEigenDecompositionProcessing3d, SoHessianMatrixProcessing2d

FILE FORMAT/DEFAULT

HessianMatrixProcessing3d {

inImage	NULL
standardDeviation	1.0f 1.0f 1.0f

}

Library references: hessianmatrix3d

---

Constructor & Destructor Documentation

SoHessianMatrixProcessing3d::SoHessianMatrixProcessing3d

(

)

Constructor.

---

Member Data Documentation

SoSFImageDataAdapter SoHessianMatrixProcessing3d::inImage

Input image.

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

SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter*> SoHessianMatrixProcessing3d::outSymmetricMatrixImage

Output image.

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

SoSFVec3f SoHessianMatrixProcessing3d::standardDeviation

Sigma for each direction (X, Y and Z).

Each value must be greater than or equal to 0.1. Default value is SbVec3f(1.0f,1.0f,1.0f).

---

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

• ImageViz/Engines/EdgeDetection/OtherDerivatives/SoHessianMatrixProcessing3d.h