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## ij.plugin.filter
Class EDM

    java.lang.Object
      ij.plugin.filter.EDM

All Implemented Interfaces:
  PlugInFilter

public class EDM
extends java.lang.Object
implements PlugInFilter

This plugin implements the Euclidean Distance Map (EDM), Ultimate Eroded Points and Watershed commands in the Process/Binary submenu. Note: These functions do not take ROIs into account (any ROI gets deselected). setup is called with no argument for EDM, "points" for ultimate eroded points and "watershed" for watershed segmentation. Ultimate Eroded Points and Watershed are handled by the MaximumFinder plugin applied to the EDM version 09-Nov-2006 Michael Schmid

Field Summary
`static int` | `ONE` unit in 16-bit EDM image: this value corresponds to a distance of one pixel
`static int` | `SQRT2` in 16-bit EDM image this value corresponds to a pixel distance of sqrt(2)
`static int` | `SQRT5` in 16-bit EDM image this value corresponds to a pixel distance of sqrt(2)

Fields inherited from interface ij.plugin.filter.PlugInFilter
`CONVERT_TO_FLOAT, DOES_16, DOES_32, DOES_8C, DOES_8G, DOES_ALL, DOES_RGB, DOES_STACKS, DONE, FINAL_PROCESSING, NO_CHANGES, NO_IMAGE_REQUIRED, NO_UNDO, PARALLELIZE_STACKS, ROI_REQUIRED, SNAPSHOT, STACK_REQUIRED, SUPPORTS_MASKING`

Constructor Summary
`EDM()`

Method Summary
`ShortProcessor` | `make16bitEDM(ImageProcessor ip)` Calculates a 16-bit grayscale Euclidean Distance Map for a binary 8-bit image.
`void` | `run(ImageProcessor ip)` Filters use this method to process the image.
`int` | `setup(java.lang.String arg, ImagePlus imp)` This method is called once when the filter is loaded.
`void` | `toEDM(ImageProcessor ip)` Converts a binary image into a 8-bit grayscale Euclidean Distance Map (EDM).

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### ONE

    public static final int ONE

  unit in 16-bit EDM image: this value corresponds to a distance of one pixel

  See Also:
    Constant Field Values

### SQRT2

    public static final int SQRT2

  in 16-bit EDM image this value corresponds to a pixel distance of sqrt(2)

  See Also:
    Constant Field Values

### SQRT5

    public static final int SQRT5

  in 16-bit EDM image this value corresponds to a pixel distance of sqrt(2)

  See Also:
    Constant Field Values

Constructor Detail

### EDM

    public EDM()

Method Detail

### setup

    public int setup(java.lang.String arg,
                     ImagePlus imp)

  Description copied from interface: `PlugInFilter`
  This method is called once when the filter is loaded. 'arg', which may be blank, is the argument specified for this plugin in IJ_Props.txt or in the plugins.config file of a jar archive containing the plugin. 'imp' is the currently active image. This method should return a flag word that specifies the filters capabilities.

  For Plugin-filters specifying the FINAL_PROCESSING flag, the setup method will be called again, this time with arg = "final" after all other processing is done.

  Specified by:
    `setup` in interface `PlugInFilter`

### run

    public void run(ImageProcessor ip)

  Description copied from interface: `PlugInFilter`
  Filters use this method to process the image. If the SUPPORTS_STACKS flag was set, it is called for each slice in a stack. With CONVERT_TO_FLOAT, the filter is called with the image data converted to a FloatProcessor (3 times per image for RGB images). ImageJ will lock the image before calling this method and unlock it when the filter is finished. For PlugInFilters specifying the NO_IMAGE_REQUIRED flag and not the DONE flag, run(ip) is called once with the argument `null`.

  Specified by:
    `run` in interface `PlugInFilter`

### toEDM

    public void toEDM(ImageProcessor ip)

  Converts a binary image into a 8-bit grayscale Euclidean Distance Map (EDM). Each foreground (zero) pixel in the binary image is assigned a value equal to its distance from the nearest background (255) pixel.

### make16bitEDM

    public ShortProcessor make16bitEDM(ImageProcessor ip)

  Calculates a 16-bit grayscale Euclidean Distance Map for a binary 8-bit image. Each foreground (black) pixel in the binary image is assigned a value equal to its distance from the nearest background (white) pixel. Uses the two-pass EDM algorithm from the "Image Processing Handbook" by John Russ.

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