Package org.geotools.api.style

Class ContrastMethod

Object

CodeList<ContrastMethod>

ContrastMethod

All Implemented Interfaces:

Serializable, Comparable<ContrastMethod>

public final class ContrastMethod
extends CodeList<ContrastMethod>

The ContrastEnhancement element defines contrast enhancement for a channel of a false-color image or for a color image.

In the case of a color image, the relative grayscale brightness of a pixel color is used. “Normalize” means to stretch the contrast so that the dimmest color is stretched to black and the brightest color is stretched to white, with all colors in between stretched out linearly. “Histogram” means to stretch the contrast based on a histogram of how many colors are at each brightness level on input, with the goal of producing equal number of pixels in the image at each brightness level on output. This has the effect of revealing many subtle ground features.

Since:

GeoAPI 2.2

Author:

Open Geospatial Consortium, Johann Sorel (Geomatys)

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final ContrastMethod	EXPONENTIAL
static final ContrastMethod	HISTOGRAM	Histogram enchancement.
static final ContrastMethod	LOGARITHMIC
static final ContrastMethod	NONE	No enchancement. this is the default value.
static final ContrastMethod	NORMALIZE	Normalize enchancement.

Method Summary

Modifier and Type	Method	Description
ContrastMethod[]	family()	Returns the list of enumerations of the same kind than this enum.
static ContrastMethod	valueOf(String code)	Returns the contrast type that matches the given string, or returns a new one if none match it.
static ContrastMethod[]	values()	Returns the list of ContrastTypes.

Methods inherited from class CodeList

compareTo, equals, hashCode, identifier, matches, name, ordinal, readResolve, toString, valueOf

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

NORMALIZE

public static final ContrastMethod NORMALIZE

Normalize enchancement. “Normalize” means to stretch the contrast so that the dimmest color is stretched to black and the brightest color is stretched to white, with all colors in between stretched out linearly.

HISTOGRAM

public static final ContrastMethod HISTOGRAM

Histogram enchancement. “Histogram” means to stretch the contrast based on a histogram of how many colors are at each brightness level on input, with the goal of producing equal number of pixels in the image at each brightness level on output.

LOGARITHMIC

public static final ContrastMethod LOGARITHMIC

EXPONENTIAL

public static final ContrastMethod EXPONENTIAL

NONE

public static final ContrastMethod NONE

No enchancement. this is the default value.

Method Details

values

public static ContrastMethod[] values()

Returns the list of ContrastTypes.

Returns:

The list of codes declared in the current JVM.

family

public ContrastMethod[] family()

Returns the list of enumerations of the same kind than this enum.

Specified by:

family in class CodeList<ContrastMethod>

Returns:

The codes of the same kind than this code.

valueOf

public static ContrastMethod valueOf(String code)

Returns the contrast type that matches the given string, or returns a new one if none match it.

Parameters:

code - The name of the code to fetch or to create.

Returns:

A code matching the given name.