ColorSpace

MAX_ID

int MAX_ID

The maximum ID value a color space can have.

Constant Value: 63 (0x0000003f)

MIN_ID

int MIN_ID

The minimum ID value a color space can have.

Constant Value: -1 (0xffffffff)

ILLUMINANT_A

float[] ILLUMINANT_A

Standard CIE 1931 2° illuminant A, encoded in xyY. This illuminant has a color temperature of 2856K.

ILLUMINANT_B

float[] ILLUMINANT_B

Standard CIE 1931 2° illuminant B, encoded in xyY. This illuminant has a color temperature of 4874K.

ILLUMINANT_C

float[] ILLUMINANT_C

Standard CIE 1931 2° illuminant C, encoded in xyY. This illuminant has a color temperature of 6774K.

ILLUMINANT_D50

float[] ILLUMINANT_D50

Standard CIE 1931 2° illuminant D50, encoded in xyY. This illuminant has a color temperature of 5003K. This illuminant is used by the profile connection space in ICC profiles.

ILLUMINANT_D55

float[] ILLUMINANT_D55

Standard CIE 1931 2° illuminant D55, encoded in xyY. This illuminant has a color temperature of 5503K.

ILLUMINANT_D60

float[] ILLUMINANT_D60

Standard CIE 1931 2° illuminant D60, encoded in xyY. This illuminant has a color temperature of 6004K.

ILLUMINANT_D65

float[] ILLUMINANT_D65

Standard CIE 1931 2° illuminant D65, encoded in xyY. This illuminant has a color temperature of 6504K. This illuminant is commonly used in RGB color spaces such as sRGB, BT.209, etc.

ILLUMINANT_D75

float[] ILLUMINANT_D75

Standard CIE 1931 2° illuminant D75, encoded in xyY. This illuminant has a color temperature of 7504K.

ILLUMINANT_E

float[] ILLUMINANT_E

Standard CIE 1931 2° illuminant E, encoded in xyY. This illuminant has a color temperature of 5454K.

adapt

ColorSpace adapt (ColorSpace colorSpace, 
                float[] whitePoint, 
                ColorSpace.Adaptation adaptation)

Performs the chromatic adaptation of a color space from its native white point to the specified white point. If the specified color space does not have an RGB color model, or if the color space already has the target white point, the color space is returned unmodified.

The chromatic adaptation is performed using the von Kries method described in the documentation of ColorSpace.Adaptation.

The color space returned by this method always has an ID of MIN_ID.

adapt

ColorSpace adapt (ColorSpace colorSpace, 
                float[] whitePoint)

Performs the chromatic adaptation of a color space from its native white point to the specified white point.

The chromatic adaptation is performed using the BRADFORD matrix.

The color space returned by this method always has an ID of MIN_ID.

connect

ColorSpace.Connector connect (ColorSpace source, 
                ColorSpace.RenderIntent intent)

Connects the specified color spaces to sRGB. If the source color space does not use CIE XYZ D65 as its profile connection space, the two spaces are chromatically adapted to use the CIE standard illuminant D50 as needed.

If the source is the sRGB color space, an optimized connector is returned to avoid unnecessary computations and loss of precision.

connect

ColorSpace.Connector connect (ColorSpace source, 
                ColorSpace destination, 
                ColorSpace.RenderIntent intent)

Connects two color spaces to allow conversion from the source color space to the destination color space. If the source and destination color spaces do not have the same profile connection space (CIE XYZ with the same white point), they are chromatically adapted to use the CIE standard illuminant D50 as needed.

If the source and destination are the same, an optimized connector is returned to avoid unnecessary computations and loss of precision.

connect

ColorSpace.Connector connect (ColorSpace source)

Connects the specified color spaces to sRGB. If the source color space does not use CIE XYZ D65 as its profile connection space, the two spaces are chromatically adapted to use the CIE standard illuminant D50 as needed.

If the source is the sRGB color space, an optimized connector is returned to avoid unnecessary computations and loss of precision.

Colors are mapped from the source color space to the destination color space using the perceptual render intent.

connect

ColorSpace.Connector connect (ColorSpace source, 
                ColorSpace destination)

Connects two color spaces to allow conversion from the source color space to the destination color space. If the source and destination color spaces do not have the same profile connection space (CIE XYZ with the same white point), they are chromatically adapted to use the CIE standard illuminant D50 as needed.

If the source and destination are the same, an optimized connector is returned to avoid unnecessary computations and loss of precision.

Colors are mapped from the source color space to the destination color space using the perceptual render intent.

equals

boolean equals (Object o)

Indicates whether some other object is "equal to" this one.

The equals method implements an equivalence relation on non-null object references:

• It is reflexive: for any non-null reference value x, x.equals(x) should return true.
• It is symmetric: for any non-null reference values x and y, x.equals(y) should return true if and only if y.equals(x) returns true.
• It is transitive: for any non-null reference values x, y, and z, if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.
• It is consistent: for any non-null reference values x and y, multiple invocations of x.equals(y) consistently return true or consistently return false, provided no information used in equals comparisons on the objects is modified.
• For any non-null reference value x, x.equals(null) should return false.

The equals method for class Object implements the most discriminating possible equivalence relation on objects; that is, for any non-null reference values x and y, this method returns true if and only if x and y refer to the same object (x == y has the value true).

Note that it is generally necessary to override the hashCode method whenever this method is overridden, so as to maintain the general contract for the hashCode method, which states that equal objects must have equal hash codes.

fromXyz

float[] fromXyz (float x, 
                float y, 
                float z)

Converts tristimulus values from the CIE XYZ space to this color space's color model.

fromXyz

float[] fromXyz (float[] v)

Converts tristimulus values from the CIE XYZ space to this color space's color model. The resulting value is passed back in the specified array.

The specified array's length must be at least equal to to the number of color components as returned by getComponentCount(), and its first 3 values must be the XYZ components to convert from.

get

ColorSpace get (ColorSpace.Named name)

Returns an instance of ColorSpace identified by the specified name. The list of names provided in the ColorSpace.Named enum gives access to a variety of common RGB color spaces.

This method always returns the same instance for a given name.

This method is thread-safe.

getComponentCount

int getComponentCount ()

Returns the number of components that form a color value according to this color space's color model.

getId

int getId ()

Returns the ID of this color space. Positive IDs match the color spaces enumerated in ColorSpace.Named. A negative ID indicates a color space created by calling one of the public constructors.

getMaxValue

float getMaxValue (int component)

Returns the maximum valid value for the specified component of this color space's color model.

getMinValue

float getMinValue (int component)

Returns the minimum valid value for the specified component of this color space's color model.

getModel

ColorSpace.Model getModel ()

Return the color model of this color space.

getName

String getName ()

Returns the name of this color space. The name is never null and contains always at least 1 character.

Color space names are recommended to be unique but are not guaranteed to be. There is no defined format but the name usually falls in one of the following categories:

• Generic names used to identify color spaces in non-RGB color models. For instance: Generic L*a*b*.
• Names tied to a particular specification. For instance: sRGB IEC61966-2.1 or SMPTE ST 2065-1:2012 ACES.
• Ad-hoc names, often generated procedurally or by the user during a calibration workflow. These names often contain the make and model of the display.

Because the format of color space names is not defined, it is not recommended to programmatically identify a color space by its name alone. Names can be used as a first approximation.

It is however perfectly acceptable to display color space names to users in a UI, or in debuggers and logs. When displaying a color space name to the user, it is recommended to add extra information to avoid ambiguities: color model, a representation of the color space's gamut, white point, etc.

hashCode

int hashCode ()

Returns a hash code value for the object. This method is supported for the benefit of hash tables such as those provided by HashMap.

The general contract of hashCode is:

• Whenever it is invoked on the same object more than once during an execution of a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
• If two objects are equal according to the equals(Object) method, then calling the hashCode method on each of the two objects must produce the same integer result.
• It is not required that if two objects are unequal according to the equals(java.lang.Object) method, then calling the hashCode method on each of the two objects must produce distinct integer results. However, the programmer should be aware that producing distinct integer results for unequal objects may improve the performance of hash tables.

As much as is reasonably practical, the hashCode method defined by class Object does return distinct integers for distinct objects. (This is typically implemented by converting the internal address of the object into an integer, but this implementation technique is not required by the Java™ programming language.)

isSrgb

boolean isSrgb ()

Indicates whether this color space is the sRGB color space or equivalent to the sRGB color space.

A color space is considered sRGB if it meets all the following conditions:

• Its color model is RGB.
• Its primaries are within 1e-3 of the true sRGB primaries.
• Its white point is withing 1e-3 of the CIE standard illuminant D65.
• Its opto-electronic transfer function is not linear.
• Its electro-optical transfer function is not linear.
• Its range is \([0..1]\).

This method always returns true for SRGB.

isWideGamut

boolean isWideGamut ()

Returns whether this color space is a wide-gamut color space. An RGB color space is wide-gamut if its gamut entirely contains the sRGB gamut and if the area of its gamut is 90% of greater than the area of the NTSC gamut.

match

ColorSpace match (float[] toXYZD50, 
                ColorSpace.Rgb.TransferParameters function)

Returns a ColorSpace.Named instance of ColorSpace that matches the specified RGB to CIE XYZ transform and transfer functions. If no instance can be found, this method returns null.

The color transform matrix is assumed to target the CIE XYZ space a D50 standard illuminant.

toString

String toString ()

Returns a string representation of the object. This method returns a string equal to the value of:

 getName() + "(id=" + getId() + ", model=" + getModel() + ")"
 

For instance, the string representation of the sRGB color space is equal to the following value:

 sRGB IEC61966-2.1 (id=0, model=RGB)
 

toXyz

float[] toXyz (float r, 
                float g, 
                float b)

Converts a color value from this color space's model to tristimulus CIE XYZ values. If the color model of this color space is not RGB, it is assumed that the target CIE XYZ space uses a D50 standard illuminant.

This method is a convenience for color spaces with a model of 3 components (RGB or LAB for instance). With color spaces using fewer or more components, use toXyz(float[]) instead

toXyz

float[] toXyz (float[] v)

Converts a color value from this color space's model to tristimulus CIE XYZ values. If the color model of this color space is not RGB, it is assumed that the target CIE XYZ space uses a D50 standard illuminant.

The specified array's length must be at least equal to to the number of color components as returned by getComponentCount().