com.emphysic.myriad.core.data.ops.math

Class Histogram

java.lang.Object

com.emphysic.myriad.core.data.ops.math.Histogram

public class Histogram
extends java.lang.Object

Simple histogram functions.

Constructor Summary

Constructors

Constructor and Description
Histogram()

Method Summary

Modifier and Type	Method and Description
static Dataset	grayScale(Dataset input) Converts a Dataset into a gray scale representation by normalizing between 0 and 255.
static Dataset	grayScale(Dataset input, int max_intensity) Converts a Dataset into a gray scale representation by normalizing between 0 and a maximum value.
static int[]	hist1d(Dataset input) Calculates the histogram for a given Dataset.
static int[]	hist1d(Dataset input, boolean normalize) Calculates the histogram for a given Dataset.
static int[]	hist1d(Dataset input, boolean normalize, int max_intensity) Calculates the one-dimensional histogram for a given Dataset.

Methods inherited from class java.lang.Object

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

Constructor Detail

Histogram

public Histogram()

Method Detail

hist1d

public static int[] hist1d(Dataset input,
                           boolean normalize,
                           int max_intensity)

Calculates the one-dimensional histogram for a given Dataset.

Parameters:

input - Dataset to examine

normalize - if true, input is normalized prior to calculating the histogram

max_intensity - maximum intensity to use

Returns:

array of size [max_intensity + 1] with a count of the number of elements in input with that value

grayScale

public static Dataset grayScale(Dataset input,
                                int max_intensity)

Converts a Dataset into a gray scale representation by normalizing between 0 and a maximum value.

Parameters:

input - input to normalize

max_intensity - maximum value to use

Returns:

Dataset with scaled amplitudes

grayScale

public static Dataset grayScale(Dataset input)

Converts a Dataset into a gray scale representation by normalizing between 0 and 255.

Parameters:

input - input to normalize

Returns:

Dataset with values between 0 and 255.

hist1d

public static int[] hist1d(Dataset input)

Calculates the histogram for a given Dataset.

Parameters:

input - Dataset to examine

Returns:

255-level histogram

hist1d

public static int[] hist1d(Dataset input,
                           boolean normalize)

Calculates the histogram for a given Dataset.

Parameters:

input - Dataset to examine

normalize - if true, normalize the data between 0-255 prior to calculating the histogram

Returns:

histogram of data