org.openimaj.image.feature.global

Enum HueStats.ToneAttr

java.lang.Object

java.lang.Enum<HueStats.ToneAttr>

org.openimaj.image.feature.global.HueStats.ToneAttr

All Implemented Interfaces:

Serializable, Comparable<HueStats.ToneAttr>

Enclosing class:

HueStats

public static enum HueStats.ToneAttr
extends Enum<HueStats.ToneAttr>

Tonal attributes for images based on the mean hue and variance.

Author:

Jonathon Hare (jsh2@ecs.soton.ac.uk)

Enum Constant Summary

Enum Constants

Enum Constant and Description
BLACK_AND_WHITE Black and white image.
COLOR Colour image
SEPIA Sepia toned image.

Method Summary

Modifier and Type	Method and Description
static HueStats.ToneAttr	getAttr(double mean, double var) Estimate the tone from the given mean and variance of the hue.
static HueStats.ToneAttr	valueOf(String name) Returns the enum constant of this type with the specified name.
static HueStats.ToneAttr[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

SEPIA

public static final HueStats.ToneAttr SEPIA

Sepia toned image.

BLACK_AND_WHITE

public static final HueStats.ToneAttr BLACK_AND_WHITE

Black and white image.

COLOR

public static final HueStats.ToneAttr COLOR

Colour image

Method Detail

values

public static HueStats.ToneAttr[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (HueStats.ToneAttr c : HueStats.ToneAttr.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static HueStats.ToneAttr valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getAttr

public static HueStats.ToneAttr getAttr(double mean,
                                        double var)

Estimate the tone from the given mean and variance of the hue. This is hand-crafted and not well tested. A variance bigger than 5e-4 is taken to imply a colour image. If the variance is less than 5e-4 and the mean hue is between -0.1 and 0.1 radians, then it is assumed the image is back and white. If the variance is less than 5e-4 and the mean hue is between -0.6 and 0.8 radians, then it is assumed the image is sepia toned.

Parameters:

mean - the mean hue

var - the variance in hue

Returns:

the estimated tone