Package 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 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 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 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, removeAlgoListener

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • 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 Details

    • 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