ColorSpace.Adaptation

Kotlin |Java

public static final enum ColorSpace.Adaptation
extends Enum<ColorSpace.Adaptation>

java.lang.Object
↳	java.lang.Enum<android.graphics.ColorSpace.Adaptation>
	↳	android.graphics.ColorSpace.Adaptation

List of adaptation matrices that can be used for chromatic adaptation using the von Kries transform. These matrices are used to convert values in the CIE XYZ space to values in the LMS space (Long Medium Short).

Given an adaptation matrix $A$, the conversion from XYZ to LMS is straightforward:

$$\left[ \begin{array}{c} L\\ M\\ S \end{array} \right] = A \left[ \begin{array}{c} X\\ Y\\ Z \end{array} \right]$$

The complete von Kries transform $T$ uses a diagonal matrix noted $D$ to perform the adaptation in LMS space. In addition to $A$ and $D$, the source white point $W1$ and the destination white point $W2$ must be specified:

$$\begin{align*} \left[ \begin{array}{c} L_1\\ M_1\\ S_1 \end{array} \right] &= A \left[ \begin{array}{c} W1_X\\ W1_Y\\ W1_Z \end{array} \right] \\\ \left[ \begin{array}{c} L_2\\ M_2\\ S_2 \end{array} \right] &= A \left[ \begin{array}{c} W2_X\\ W2_Y\\ W2_Z \end{array} \right] \\\ D &= \left[ \begin{matrix} \frac{L_2}{L_1} & 0 & 0 \\\ 0 & \frac{M_2}{M_1} & 0 \\\ 0 & 0 & \frac{S_2}{S_1} \end{matrix} \right] \\\ T &= A^{-1}.D.A \end{align*}$$

As an example, the resulting matrix $T$ can then be used to perform the chromatic adaptation of sRGB XYZ transform from D65 to D50:

$$sRGB_{D50} = T.sRGB_{D65}$$

See also:

Summary

Enum values
`ColorSpace.Adaptation`	`BRADFORD` Bradford chromatic adaptation transform, as defined in the CIECAM97s color appearance model.
`ColorSpace.Adaptation`	`CIECAT02` CIECAT02 chromatic adaption transform, as defined in the CIECAM02 color appearance model.
`ColorSpace.Adaptation`	`VON_KRIES` von Kries chromatic adaptation transform.

Public methods
`static ColorSpace.Adaptation`	`valueOf(String name)`
`static final Adaptation[]`	`values()`

Inherited methods

From class


        
          java.lang.Enum

`final Object`	`clone()` Throws CloneNotSupportedException.
`final int`	`compareTo(E o)` Compares this enum with the specified object for order.
`final boolean`	`equals(Object other)` Returns true if the specified object is equal to this enum constant.
`final void`	`finalize()` enum classes cannot have finalize methods.
`final Class<E>`	`getDeclaringClass()` Returns the Class object corresponding to this enum constant's enum type.
`final int`	`hashCode()` Returns a hash code for this enum constant.
`final String`	`name()` Returns the name of this enum constant, exactly as declared in its enum declaration.
`final int`	`ordinal()` Returns the ordinal of this enumeration constant (its position in its enum declaration, where the initial constant is assigned an ordinal of zero).
`String`	`toString()` Returns the name of this enum constant, as contained in the declaration.
`static <T extends Enum<T>> T`	`valueOf(Class<T> enumClass, String name)` Returns the enum constant of the specified enum class with the specified name.

From class


        
          java.lang.Object

`Object`	`clone()` Creates and returns a copy of this object.
`boolean`	`equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void`	`finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>`	`getClass()` Returns the runtime class of this `Object`.
`int`	`hashCode()` Returns a hash code value for the object.
`final void`	`notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void`	`notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String`	`toString()` Returns a string representation of the object.
`final void`	`wait(long timeoutMillis, int nanos)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait(long timeoutMillis)` Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed.
`final void`	`wait()` Causes the current thread to wait until it is awakened, typically by being notified or interrupted.

From interface


        
          java.lang.Comparable


      compareTo(E o)

Compares this object with the specified object for order.

Enum values

BRADFORD

Added in API level 26

public static final ColorSpace.Adaptation BRADFORD

Bradford chromatic adaptation transform, as defined in the CIECAM97s color appearance model.

CIECAT02

Added in API level 26

public static final ColorSpace.Adaptation CIECAT02

CIECAT02 chromatic adaption transform, as defined in the CIECAM02 color appearance model.

VON_KRIES

Added in API level 26

public static final ColorSpace.Adaptation VON_KRIES

von Kries chromatic adaptation transform.

Public methods

valueOf

public static ColorSpace.Adaptation valueOf (String name)

Parameters
`name`	`String`

Returns
`ColorSpace.Adaptation`

values

public static final Adaptation[] values ()

Returns
`Adaptation[]`