ColorSpace.Rgb.TransferParameters

public static class ColorSpace.Rgb.TransferParameters
extends Object

java.lang.Object
   ↳ android.graphics.ColorSpace.Rgb.TransferParameters


Defines the parameters for the ICC parametric curve type 4, as defined in ICC.1:2004-10, section 10.15.

The EOTF is of the form:

\(\begin{equation} Y = \begin{cases}c X + f & X \lt d \\\ \left( a X + b \right) ^{g} + e & X \ge d \end{cases} \end{equation}\)

The corresponding OETF is simply the inverse function.

The parameters defined by this class form a valid transfer function only if all the following conditions are met:

  • No parameter is a Not-a-Number
  • \(d\) is in the range \([0..1]\)
  • The function is not constant
  • The function is positive and increasing

Summary

Fields

public final double a

Variable \(a\) in the equation of the EOTF described above.

public final double b

Variable \(b\) in the equation of the EOTF described above.

public final double c

Variable \(c\) in the equation of the EOTF described above.

public final double d

Variable \(d\) in the equation of the EOTF described above.

public final double e

Variable \(e\) in the equation of the EOTF described above.

public final double f

Variable \(f\) in the equation of the EOTF described above.

public final double g

Variable \(g\) in the equation of the EOTF described above.

Public constructors

TransferParameters(double a, double b, double c, double d, double g)

Defines the parameters for the ICC parametric curve type 3, as defined in ICC.1:2004-10, section 10.15.

TransferParameters(double a, double b, double c, double d, double e, double f, double g)

Defines the parameters for the ICC parametric curve type 4, as defined in ICC.1:2004-10, section 10.15.

Public methods

boolean equals(Object o)

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

int hashCode()

Returns a hash code value for the object.

Inherited methods

Fields

a

Added in API level 26
public final double a

Variable \(a\) in the equation of the EOTF described above.

b

Added in API level 26
public final double b

Variable \(b\) in the equation of the EOTF described above.

c

Added in API level 26
public final double c

Variable \(c\) in the equation of the EOTF described above.

d

Added in API level 26
public final double d

Variable \(d\) in the equation of the EOTF described above.

e

Added in API level 26
public final double e

Variable \(e\) in the equation of the EOTF described above.

f

Added in API level 26
public final double f

Variable \(f\) in the equation of the EOTF described above.

g

Added in API level 26
public final double g

Variable \(g\) in the equation of the EOTF described above.

Public constructors

TransferParameters

Added in API level 26
public TransferParameters (double a, 
                double b, 
                double c, 
                double d, 
                double g)

Defines the parameters for the ICC parametric curve type 3, as defined in ICC.1:2004-10, section 10.15.

The EOTF is of the form:

\(\begin{equation} Y = \begin{cases}c X & X \lt d \\\ \left( a X + b \right) ^{g} & X \ge d \end{cases} \end{equation}\)

This constructor is equivalent to setting \(e\) and \(f\) to 0.

Parameters
a double: The value of \(a\) in the equation of the EOTF described above

b double: The value of \(b\) in the equation of the EOTF described above

c double: The value of \(c\) in the equation of the EOTF described above

d double: The value of \(d\) in the equation of the EOTF described above

g double: The value of \(g\) in the equation of the EOTF described above

Throws
IllegalArgumentException If the parameters form an invalid transfer function

TransferParameters

Added in API level 26
public TransferParameters (double a, 
                double b, 
                double c, 
                double d, 
                double e, 
                double f, 
                double g)

Defines the parameters for the ICC parametric curve type 4, as defined in ICC.1:2004-10, section 10.15.

Parameters
a double: The value of \(a\) in the equation of the EOTF described above

b double: The value of \(b\) in the equation of the EOTF described above

c double: The value of \(c\) in the equation of the EOTF described above

d double: The value of \(d\) in the equation of the EOTF described above

e double: The value of \(e\) in the equation of the EOTF described above

f double: The value of \(f\) in the equation of the EOTF described above

g double: The value of \(g\) in the equation of the EOTF described above

Throws
IllegalArgumentException If the parameters form an invalid transfer function

Public methods

equals

Added in API level 26
public 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.

An equivalence relation partitions the elements it operates on into equivalence classes; all the members of an equivalence class are equal to each other. Members of an equivalence class are substitutable for each other, at least for some purposes.

Parameters
o Object: the reference object with which to compare.

Returns
boolean true if this object is the same as the obj argument; false otherwise.

hashCode

Added in API level 26
public 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 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 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.

Returns
int a hash code value for this object.