inra.ijpb.morphology.directional

Class DirectionalFilter

java.lang.Object

inra.ijpb.algo.AlgoStub

inra.ijpb.morphology.directional.DirectionalFilter

All Implemented Interfaces:

Algo

public class DirectionalFilter
extends AlgoStub

Directional filtering of planar images.

Oriented structuring elements are considered, for example linear structuring elements. A collection of orientation is chosen, and the result of a filtering operation is performed for each orientation of the structuring element. The results are combined to create the resulting image.

Author:

David Legland

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	DirectionalFilter.Operation A pre-defined set of operations.
static class	DirectionalFilter.Type Specifies how to combine the different orientations: min or max.

Constructor Summary

Constructors

Constructor and Description
DirectionalFilter(DirectionalFilter.Type type, DirectionalFilter.Operation op, int lineLength, int nTheta) Creates new instance of directional filter using line structuring elements.
DirectionalFilter(DirectionalFilter.Type type, DirectionalFilter.Operation op, OrientedStrelFactory factory, int nTheta) Creates new instance of directional filter for arbitrary structuring elements, by specifying the factory.

Method Summary

Modifier and Type	Method and Description
static ij.process.ImageProcessor	mean(ij.process.ImageProcessor image, Strel strel) Computes the average value among the neighbors.
static ij.process.ImageProcessor	median(ij.process.ImageProcessor image, Strel strel) Computes the median value among the neighbors.
ij.process.ImageProcessor	process(ij.process.ImageProcessor image) Apply directional filter with current settings to the specified image.

Methods inherited from class inra.ijpb.algo.AlgoStub

addAlgoListener, fireProgressChanged, fireProgressChanged, fireStatusChanged, fireStatusChanged, removeAlgoListener

Methods inherited from class java.lang.Object

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

Constructor Detail

DirectionalFilter

public DirectionalFilter(DirectionalFilter.Type type,
                         DirectionalFilter.Operation op,
                         int lineLength,
                         int nTheta)

Creates new instance of directional filter using line structuring elements.

Parameters:

type - the type of combination (min or max)

op - the operation to apply with each structuring element

lineLength - the (approximated) length of each line structuring element (in pixels)

nTheta - the number of directions to consider

DirectionalFilter

public DirectionalFilter(DirectionalFilter.Type type,
                         DirectionalFilter.Operation op,
                         OrientedStrelFactory factory,
                         int nTheta)

Creates new instance of directional filter for arbitrary structuring elements, by specifying the factory.

Parameters:

type - the type of combination (min or max)

op - the operation to apply with each structuring element

factory - the factory for creating structuring elements of various orientations

nTheta - the number of directions to consider

Method Detail

process

public ij.process.ImageProcessor process(ij.process.ImageProcessor image)

Apply directional filter with current settings to the specified image.

Parameters:

image - a grayscale image

Returns:

the result of directional filter

mean

public static ij.process.ImageProcessor mean(ij.process.ImageProcessor image,
                                             Strel strel)

Computes the average value among the neighbors.

Parameters:

image - input image

strel - structuring element

Returns:

result image

median

public static ij.process.ImageProcessor median(ij.process.ImageProcessor image,
                                               Strel strel)

Computes the median value among the neighbors.

Parameters:

image - input image

strel - structuring element

Returns:

result image