inra.ijpb.measure.region2d

Class IntrinsicVolumes2DUtils

java.lang.Object

inra.ijpb.measure.region2d.IntrinsicVolumes2DUtils

public class IntrinsicVolumes2DUtils
extends Object

Utility functions for classes that compute 2D intrinsic volumes measures.

Author:

dlegland

See Also:

IntrinsicVolumes2D

Method Summary

Modifier and Type	Method and Description
static double[]	areaLut(ij.measure.Calibration calib) Computes the Look-up table that is used for computing area.
static double[]	computeCircularities(IntrinsicVolumesAnalyzer2D.Result[] morphos) Utility method that computes circularities as a numeric array from the result array
static int[]	eulerNumberIntLut(int conn) Computes the Look-up table that is used to compute Euler number density.
static double[]	eulerNumberLut(int conn) Computes the Look-up table that is used to compute Euler number density.
static double[]	perimeterLut(ij.measure.Calibration calib, int nDirs) Computes the Look-up table that is used for computing perimeter.

Methods inherited from class java.lang.Object

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

Method Detail

areaLut

public static final double[] areaLut(ij.measure.Calibration calib)

Computes the Look-up table that is used for computing area. The result is an array with 16 entries, each entry corresponding to a binary 2-by-2 configuration of pixels.

Parameters:

calib - the calibration of the image

Returns:

an array containing for each 2-by-2 configuration index, the corresponding contribution to the calibrated area fraction within configuration

perimeterLut

public static final double[] perimeterLut(ij.measure.Calibration calib,
                                          int nDirs)

Computes the Look-up table that is used for computing perimeter. The result is an array with 16 entries, each entry corresponding to a binary 2-by-2 configuration of pixels.

Parameters:

calib - the calibration of the image

nDirs - the number of directions to use (2 or 4)

Returns:

an array containing for each 2-by-2 configuration index, the corresponding contribution to the calibrated perimeter estimate

computeCircularities

public static final double[] computeCircularities(IntrinsicVolumesAnalyzer2D.Result[] morphos)

Utility method that computes circularities as a numeric array from the result array

Parameters:

morphos - the array of results

Returns:

the numeric array of circularities

eulerNumberLut

public static final double[] eulerNumberLut(int conn)

Computes the Look-up table that is used to compute Euler number density. The result is an array with 16 entries, each entry corresponding to a binary 2-by-2 configuration of pixels.

Parameters:

conn - the connectivity to use (4 or 8)

Returns:

an array containing for each 2-by-2 configuration index, the corresponding contribution to euler number estimate

eulerNumberIntLut

public static final int[] eulerNumberIntLut(int conn)

Computes the Look-up table that is used to compute Euler number density. The result is an array with 16 entries, each entry corresponding to a binary 2-by-2 configuration of pixels.

Parameters:

conn - the connectivity to use (4 or 8)

Returns:

an array containing for each 2-by-2 configuration index, the corresponding contribution to euler number estimate