SoHessianMatrixProcessing2d

java.lang.Object
- com.openinventor.inventor.Inventor
- - com.openinventor.inventor.misc.SoBase
  - - com.openinventor.inventor.fields.SoFieldContainer
    - - com.openinventor.inventor.engines.SoEngine
      - com.openinventor.imageviz.engines.SoImageVizEngine
        
        com.openinventor.imageviz.engines.edgedetection.otherderivatives.SoHessianMatrixProcessing2d

All Implemented Interfaces:

SafeDisposable
```
public class SoHessianMatrixProcessing2d
extends SoImageVizEngine
```
SoHessianMatrixProcessing2d engine computes the local Hessian matrix. The SoHessianMatrixProcessing2d engine 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 SoEigenDecompositionProcessing2d can be applied on the spectral image output.
SEE ALSO
SoGaussianDerivativeProcessing, SoEigenDecompositionProcessing2d, SoHessianMatrixProcessing3d
File format/default:
HessianMatrixProcessing2d {
}

Library references: hessianmatrix

Nested Class Summary
- Nested classes/interfaces inherited from class com.openinventor.imageviz.engines.SoImageVizEngine
  SoImageVizEngine.ComputeModes, SoImageVizEngine.EventArg, SoImageVizEngine.Neighborhood3ds
- Nested classes/interfaces inherited from class com.openinventor.inventor.Inventor
  Inventor.ConstructorCommand

Field Summary

Fields
Modifier and Type	Field	Description
`SoSFImageDataAdapter`	`inImage`	Input image.
`SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter>`	`outSymmetricMatrixImage`	Output image.
`SoSFVec2f`	`standardDeviation`	Sigma for each direction (X, Y).

Fields inherited from class com.openinventor.imageviz.engines.SoImageVizEngine
onBegin, onEnd, onProgress

Fields inherited from class com.openinventor.inventor.Inventor
VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors
Constructor Description

SoHessianMatrixProcessing2d()
Constructor.

Method Summary
- Methods inherited from class com.openinventor.imageviz.engines.SoImageVizEngine
  abortEvaluate, isEvaluating, startEvaluate, waitEvaluate
- Methods inherited from class com.openinventor.inventor.engines.SoEngine
  copy, getByName, getOutput, getOutputName
- Methods inherited from class com.openinventor.inventor.fields.SoFieldContainer
  copyFieldValues, copyFieldValues, enableNotify, fieldsAreEqual, get, getAllFields, getEventIn, getEventOut, getField, getFieldName, hasDefaultValues, isNotifyEnabled, set, setToDefaults
- Methods inherited from class com.openinventor.inventor.misc.SoBase
  dispose, getName, isDisposable, isSynchronizable, setName, setSynchronizable, touch
- Methods inherited from class com.openinventor.inventor.Inventor
  getNativeResourceHandle
- Methods inherited from class java.lang.Object
  equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - inImage
```
public final SoSFImageDataAdapter inImage
```
    Input image. Default value is NULL. Supported types include: grayscale image.
  - standardDeviation
```
public final SoSFVec2f standardDeviation
```
    Sigma for each direction (X, Y). Each value must be greater than or equal to 0.1. Default value is SbVec2f(1.0f,1.0f).
  - outSymmetricMatrixImage
```
public final SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter> outSymmetricMatrixImage
```
    Output image. Default value is NULL. Supported types include: grayscale image.
- Constructor Detail
  - SoHessianMatrixProcessing2d
```
public SoHessianMatrixProcessing2d()
```
    Constructor.