com.bonzaiengine.procedural.filter

Class CannyEdge

java.lang.Object

com.bonzaiengine.procedural.FunctionAggregator

com.bonzaiengine.procedural.filter.CannyEdge

All Implemented Interfaces:

IFunction

public class CannyEdge
extends FunctionAggregator

Field Summary

Fields

Modifier and Type	Field and Description
boolean	accurate
IFunction	function
int	height
Kernel	kernelH
Kernel	kernelV
int	layers
boolean	thinEdges
float	thresholdEnd
float	thresholdStart
int	width

Fields inherited from interface com.bonzaiengine.procedural.IFunction

L0, N, NX, NY, NZ

Constructor Summary

Constructors

Constructor and Description
CannyEdge(IExplicitFunction function, Kernel kernelH, Kernel kernelV, boolean accurate, float thresholdStart, float thresholdEnd, boolean thinEdges)
CannyEdge(IFunction function, Kernel kernelH, Kernel kernelV, boolean accurate, float thresholdStart, float thresholdEnd, boolean thinEdges, int width, int height, int layers) Edge detection using gradient References: https://en.wikipedia.org/wiki/Canny_edge_detector

Method Summary

Modifier and Type	Method and Description
protected IFunction	createAggregate()
static IFunction	gradient(IExplicitFunction function, boolean accurate, float thresholdStart, float thresholdEnd, boolean thinEdges)
static IFunction	gradient(IFunction function, int width, int height, int layers, boolean accurate, float thresholdStart, float thresholdEnd, boolean thinEdges)
static IFunction	sobel(IExplicitFunction function, boolean accurate, float thresholdStart, float thresholdEnd, boolean thinEdges)
static IFunction	sobel(IFunction function, int width, int height, int layers, boolean accurate, float thresholdStart, float thresholdEnd, boolean thinEdges)

Methods inherited from class com.bonzaiengine.procedural.FunctionAggregator

get, get2D, getDerivative, getDerivative2D

Methods inherited from class java.lang.Object

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

Field Detail

function

public final IFunction function

kernelH

public final Kernel kernelH

kernelV

public final Kernel kernelV

accurate

public final boolean accurate

thresholdStart

public final float thresholdStart

thresholdEnd

public final float thresholdEnd

thinEdges

public final boolean thinEdges

width

public final int width

height

public final int height

layers

public final int layers

Constructor Detail

CannyEdge

public CannyEdge(IExplicitFunction function,
                 Kernel kernelH,
                 Kernel kernelV,
                 boolean accurate,
                 float thresholdStart,
                 float thresholdEnd,
                 boolean thinEdges)

CannyEdge

public CannyEdge(IFunction function,
                 Kernel kernelH,
                 Kernel kernelV,
                 boolean accurate,
                 float thresholdStart,
                 float thresholdEnd,
                 boolean thinEdges,
                 int width,
                 int height,
                 int layers)

Edge detection using gradient
References: https://en.wikipedia.org/wiki/Canny_edge_detector

Parameters:

accurate - edge magnitude using sqrt(dx²+dy²) if accurate, or abs(dx)+abs(dy).
Reference: https://en.wikipedia.org/wiki/Canny_edge_detector#Finding_the_Intensity_Gradient_of_the_Image

thresholdStart -

thresholdEnd - if < 1, applies hysteresis thresholding
Reference: https://en.wikipedia.org/wiki/Canny_edge_detector#Edge_Tracking_by_Hysteresis

thinEdges - Non-maximum Suppression
Reference: https://en.wikipedia.org/wiki/Canny_edge_detector#Non-maximum_Suppression

Method Detail

createAggregate

protected IFunction createAggregate()

Specified by:

createAggregate in class FunctionAggregator

sobel

public static IFunction sobel(IExplicitFunction function,
                              boolean accurate,
                              float thresholdStart,
                              float thresholdEnd,
                              boolean thinEdges)

See Also:

#cannyEdge(IExplicitFunction, IExplicitFunction, boolean, float, float, boolean)

sobel

public static IFunction sobel(IFunction function,
                              int width,
                              int height,
                              int layers,
                              boolean accurate,
                              float thresholdStart,
                              float thresholdEnd,
                              boolean thinEdges)

See Also:

#cannyEdge(IExplicitFunction, IExplicitFunction, boolean, float, float, boolean)

gradient

public static IFunction gradient(IExplicitFunction function,
                                 boolean accurate,
                                 float thresholdStart,
                                 float thresholdEnd,
                                 boolean thinEdges)

See Also:

#cannyEdge(IExplicitFunction, IExplicitFunction, boolean, float, float, boolean)

gradient

public static IFunction gradient(IFunction function,
                                 int width,
                                 int height,
                                 int layers,
                                 boolean accurate,
                                 float thresholdStart,
                                 float thresholdEnd,
                                 boolean thinEdges)

See Also:

#cannyEdge(IExplicitFunction, IExplicitFunction, boolean, float, float, boolean)