Serializable
ICC_ColorSpace
public abstract class ColorSpace extends Object implements Serializable
Color
object or, via a ColorModel
object, of an Image
, a BufferedImage
, or a GraphicsDevice
. It contains methods that transform colors in a specific color space to/from sRGB and to/from a well-defined CIEXYZ color space. For purposes of the methods in this class, colors are represented as arrays of color components represented as floats in a normalized range defined by each ColorSpace
. For many ColorSpaces
(e.g. sRGB), this range is 0.0 to 1.0. However, some ColorSpaces
have components whose values have a different range. Methods are provided to inquire per component minimum and maximum normalized values.
Several variables are defined for purposes of referring to color space types (e.g. TYPE_RGB
, TYPE_XYZ
, etc.) and to refer to specific color spaces (e.g. CS_sRGB
and CS_CIEXYZ
). sRGB is a proposed standard RGB color space. For more information, see http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html.
The purpose of the methods to transform to/from the well-defined CIEXYZ color space is to support conversions between any two color spaces at a reasonably high degree of accuracy. It is expected that particular implementations of subclasses of ColorSpace
(e.g. ICC_ColorSpace
) will support high performance conversion based on underlying platform color management systems.
The CS_CIEXYZ
space used by the toCIEXYZ/fromCIEXYZ
methods can be described as follows:
CIEXYZ viewing illuminance: 200 lux viewing white point: CIE D50 media white point: "that of a perfectly reflecting diffuser" -- D50 media black point: 0 lux or 0 Reflectance flare: 1 percent surround: 20percent of the media white point media description: reflection print (i.e., RLAB, Hunt viewing media) note: For developers creating an ICC profile for this conversion space, the following is applicable. Use a simple Von Kries white point adaptation folded into the 3X3 matrix parameters and fold the flare and surround effects into the three one-dimensional lookup tables (assuming one uses the minimal model for monitors).
Modifier and Type | Field | Description |
---|---|---|
static final int |
CS_CIEXYZ |
The built-in CIEXYZ conversion color space defined above. |
static final int |
CS_GRAY |
The built-in linear gray scale color space. |
static final int |
CS_LINEAR_RGB |
The built-in linear RGB color space. |
static final int |
CS_PYCC |
The built-in Photo YCC conversion color space. |
static final int |
CS_sRGB |
The built-in sRGB color space defined at http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html. |
static final int |
TYPE_2CLR |
Generic 2 component color spaces. |
static final int |
TYPE_3CLR |
Generic 3 component color spaces. |
static final int |
TYPE_4CLR |
Generic 4 component color spaces. |
static final int |
TYPE_5CLR |
Generic 5 component color spaces. |
static final int |
TYPE_6CLR |
Generic 6 component color spaces. |
static final int |
TYPE_7CLR |
Generic 7 component color spaces. |
static final int |
TYPE_8CLR |
Generic 8 component color spaces. |
static final int |
TYPE_9CLR |
Generic 9 component color spaces. |
static final int |
TYPE_ACLR |
Generic 10 component color spaces. |
static final int |
TYPE_BCLR |
Generic 11 component color spaces. |
static final int |
TYPE_CCLR |
Generic 12 component color spaces. |
static final int |
TYPE_CMY |
Any of the family of CMY color spaces. |
static final int |
TYPE_CMYK |
Any of the family of CMYK color spaces. |
static final int |
TYPE_DCLR |
Generic 13 component color spaces. |
static final int |
TYPE_ECLR |
Generic 14 component color spaces. |
static final int |
TYPE_FCLR |
Generic 15 component color spaces. |
static final int |
TYPE_GRAY |
Any of the family of GRAY color spaces. |
static final int |
TYPE_HLS |
Any of the family of HLS color spaces. |
static final int |
TYPE_HSV |
Any of the family of HSV color spaces. |
static final int |
TYPE_Lab |
Any of the family of Lab color spaces. |
static final int |
TYPE_Luv |
Any of the family of Luv color spaces. |
static final int |
TYPE_RGB |
Any of the family of RGB color spaces. |
static final int |
TYPE_XYZ |
Any of the family of XYZ color spaces. |
static final int |
TYPE_YCbCr |
Any of the family of YCbCr color spaces. |
static final int |
TYPE_Yxy |
Any of the family of Yxy color spaces. |
Modifier | Constructor | Description |
---|---|---|
protected |
Constructs a ColorSpace object given a color space type and the number of components. |
Modifier and Type | Method | Description |
---|---|---|
abstract float[] |
fromCIEXYZ |
Transforms a color value assumed to be in the CS_CIEXYZ conversion color space into this ColorSpace . |
abstract float[] |
fromRGB |
Transforms a color value assumed to be in the default CS_sRGB color space into this ColorSpace . |
static ColorSpace |
getInstance |
Returns a ColorSpace representing one of the specific predefined color spaces. |
float |
getMaxValue |
Returns the maximum normalized color component value for the specified component. |
float |
getMinValue |
Returns the minimum normalized color component value for the specified component. |
String |
getName |
Returns the name of the component given the component index. |
int |
getNumComponents() |
Returns the number of components of this ColorSpace. |
int |
getType() |
Returns the color space type of this ColorSpace (for example TYPE_RGB , TYPE_XYZ , ...). |
boolean |
isCS_sRGB() |
Returns true if the ColorSpace is CS_sRGB . |
abstract float[] |
toCIEXYZ |
Transforms a color value assumed to be in this ColorSpace into the CS_CIEXYZ conversion color space. |
abstract float[] |
toRGB |
Transforms a color value assumed to be in this ColorSpace into a value in the default CS_sRGB color space. |
@Native public static final int TYPE_XYZ
@Native public static final int TYPE_Lab
@Native public static final int TYPE_Luv
@Native public static final int TYPE_YCbCr
@Native public static final int TYPE_Yxy
@Native public static final int TYPE_RGB
@Native public static final int TYPE_GRAY
@Native public static final int TYPE_HSV
@Native public static final int TYPE_HLS
@Native public static final int TYPE_CMYK
@Native public static final int TYPE_CMY
@Native public static final int TYPE_2CLR
@Native public static final int TYPE_3CLR
@Native public static final int TYPE_4CLR
@Native public static final int TYPE_5CLR
@Native public static final int TYPE_6CLR
@Native public static final int TYPE_7CLR
@Native public static final int TYPE_8CLR
@Native public static final int TYPE_9CLR
@Native public static final int TYPE_ACLR
@Native public static final int TYPE_BCLR
@Native public static final int TYPE_CCLR
@Native public static final int TYPE_DCLR
@Native public static final int TYPE_ECLR
@Native public static final int TYPE_FCLR
@Native public static final int CS_sRGB
@Native public static final int CS_LINEAR_RGB
CS_sRGB
, but has a linear tone reproduction curve.@Native public static final int CS_CIEXYZ
@Native public static final int CS_PYCC
@Native public static final int CS_GRAY
protected ColorSpace(int type, int numComponents)
ColorSpace
object given a color space type and the number of components.type
- one of the ColorSpace
type constantsnumComponents
- the number of components in the color spacepublic static ColorSpace getInstance(int cspace)
ColorSpace
representing one of the specific predefined color spaces.cspace
- a specific color space identified by one of the predefined class constants (e.g. CS_sRGB
, CS_LINEAR_RGB
, CS_CIEXYZ
, CS_GRAY
, or CS_PYCC
)ColorSpace
objectpublic boolean isCS_sRGB()
ColorSpace
is CS_sRGB
.true
if this is a CS_sRGB
color space, false
if it is notpublic abstract float[] toRGB(float[] colorvalue)
ColorSpace
into a value in the default CS_sRGB
color space. This method transforms color values using algorithms designed to produce the best perceptual match between input and output colors. In order to do colorimetric conversion of color values, you should use the toCIEXYZ
method of this color space to first convert from the input color space to the CS_CIEXYZ color space, and then use the fromCIEXYZ
method of the CS_sRGB
color space to convert from CS_CIEXYZ
to the output color space. See toCIEXYZ
and fromCIEXYZ
for further information.
colorvalue
- a float array with length of at least the number of components in this ColorSpace
ArrayIndexOutOfBoundsException
- if array length is not at least the number of components in this ColorSpace
public abstract float[] fromRGB(float[] rgbvalue)
CS_sRGB
color space into this ColorSpace
. This method transforms color values using algorithms designed to produce the best perceptual match between input and output colors. In order to do colorimetric conversion of color values, you should use the toCIEXYZ
method of the CS_sRGB
color space to first convert from the input color space to the CS_CIEXYZ
color space, and then use the fromCIEXYZ
method of this color space to convert from CS_CIEXYZ
to the output color space. See toCIEXYZ
and fromCIEXYZ
for further information.
rgbvalue
- a float array with length of at least 3ColorSpace
ArrayIndexOutOfBoundsException
- if array length is not at least 3public abstract float[] toCIEXYZ(float[] colorvalue)
ColorSpace
into the CS_CIEXYZ
conversion color space. This method transforms color values using relative colorimetry, as defined by the International Color Consortium standard. This means that the XYZ values returned by this method are represented relative to the D50 white point of the CS_CIEXYZ
color space. This representation is useful in a two-step color conversion process in which colors are transformed from an input color space to CS_CIEXYZ
and then to an output color space. This representation is not the same as the XYZ values that would be measured from the given color value by a colorimeter. A further transformation is necessary to compute the XYZ values that would be measured using current CIE recommended practices. See the toCIEXYZ
method of ICC_ColorSpace
for further information.
colorvalue
- a float array with length of at least the number of components in this ColorSpace
ArrayIndexOutOfBoundsException
- if array length is not at least the number of components in this ColorSpace
.public abstract float[] fromCIEXYZ(float[] colorvalue)
CS_CIEXYZ
conversion color space into this ColorSpace
. This method transforms color values using relative colorimetry, as defined by the International Color Consortium standard. This means that the XYZ argument values taken by this method are represented relative to the D50 white point of the CS_CIEXYZ
color space. This representation is useful in a two-step color conversion process in which colors are transformed from an input color space to CS_CIEXYZ
and then to an output color space. The color values returned by this method are not those that would produce the XYZ value passed to the method when measured by a colorimeter. If you have XYZ values corresponding to measurements made using current CIE recommended practices, they must be converted to D50 relative values before being passed to this method. See the fromCIEXYZ
method of ICC_ColorSpace
for further information.
colorvalue
- a float array with length of at least 3ColorSpace
ArrayIndexOutOfBoundsException
- if array length is not at least 3public int getType()
ColorSpace
(for example TYPE_RGB
, TYPE_XYZ
, ...). The type defines the number of components of the color space and the interpretation, e.g. TYPE_RGB
identifies a color space with three components - red, green, and blue. It does not define the particular color characteristics of the space, e.g. the chromaticities of the primaries.ColorSpace
public int getNumComponents()
ColorSpace
public String getName(int component)
component
- the component indexIllegalArgumentException
- if component
is less than 0 or greater than numComponents - 1
public float getMinValue(int component)
component
- the component indexIllegalArgumentException
- if component is less than 0 or greater than numComponents - 1
public float getMaxValue(int component)
component
- the component indexIllegalArgumentException
- if component is less than 0 or greater than numComponents - 1
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https://docs.oracle.com/en/java/javase/21/docs/api/java.desktop/java/awt/color/ColorSpace.html