com.openinventor.imageviz.engines.edgedetection.edgemarking

Class SoGradientLocalMaximaProcessing2d

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.edgemarking.SoGradientLocalMaximaProcessing2d

All Implemented Interfaces:

SafeDisposable

public class SoGradientLocalMaximaProcessing2d
extends SoImageVizEngine

SoGradientLocalMaximaProcessing2d engine The SoGradientLocalMaximaProcessing2d engine suppresses the non-local maxima of the gradient amplitude.

For an introduction, see:

• section Edge Detection
• Introduction to Edge Marking

The SoGradientLocalMaximaProcessing2d engine suppresses the non-local maxima of the gradient amplitude. For each pixel of gradient image, gray level values within the neighborhood in the direction of the gradient are computed (given by X and Y gradients). If this value is greater than all of its neighbors, it is kept, otherwise it is set to 0. This module eliminates some noise effects. It is very useful after applying the module SoGradientOperatorProcessing2d. The output edges are one pixel thickness edges. It is then possible to perform a SoHysteresisThresholdingProcessing.

See also:

SoRidgeDetectionProcessing

File format/default:

GradientLocalMaximaProcessing2d {

inGradientXImage	NULL
inGradientYImage	NULL
inAmplitudeImage	NULL

}

Library references: lmaxima

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 and Description
SoSFImageDataAdapter	inAmplitudeImage The gradient amplitude input image.
SoSFImageDataAdapter	inGradientXImage The input X-gradient image.
SoSFImageDataAdapter	inGradientYImage The input Y-gradient image.
SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter>	outImage The output image.

Fields inherited from class com.openinventor.imageviz.engines.SoImageVizEngine

CONNECTIVITY_18, CONNECTIVITY_26, CONNECTIVITY_6, MODE_2D, MODE_3D, MODE_AUTO, onBegin, onEnd, onProgress

Fields inherited from class com.openinventor.inventor.Inventor

VERBOSE_LEVEL, ZeroHandle

Constructor Summary

Constructors

Constructor and Description
SoGradientLocalMaximaProcessing2d() 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, getEXTERNPROTO, getName, getPROTO, isDisposable, isSynchronizable, setName, setSynchronizable, touch

Methods inherited from class com.openinventor.inventor.Inventor

getAddress, getNativeResourceHandle, startInternalThreads, stopInternalThreads

Methods inherited from class java.lang.Object

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

Field Detail

inGradientXImage

public final SoSFImageDataAdapter inGradientXImage

The input X-gradient image. Default value is NULL. Supported types include: grayscale color image.

inGradientYImage

public final SoSFImageDataAdapter inGradientYImage

The input Y-gradient image. Default value is NULL. Supported types include: grayscale color image.

inAmplitudeImage

public final SoSFImageDataAdapter inAmplitudeImage

The gradient amplitude input image. Default value is NULL. Supported types include: grayscale binary label color image.

outImage

public final SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter> outImage

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

Constructor Detail

SoGradientLocalMaximaProcessing2d

public SoGradientLocalMaximaProcessing2d()

Constructor.