java.lang.Object
java.awt.color.ICC_Profile
java.awt.color.ICC_ProfileGray
- All Implemented Interfaces:
Serializable
The
ICC_ProfileGray class is a subclass of the ICC_Profile
class that represents profiles which meet the following criteria: the color
space type of the profile is TYPE_GRAY and the profile includes the
grayTRCTag and mediaWhitePointTag tags. The
getInstance methods in the ICC_Profile class will return an
ICC_ProfileGray object when the above conditions are met. Examples of
this kind of profile are monochrome input profiles, monochrome display
profiles, and monochrome output profiles.
The advantage of this class is that it provides a lookup table that Java or native methods can use directly to optimize color conversion in some cases.
To transform from a GRAY device profile color space to the CIEXYZ Profile Connection Space, the device gray component is transformed by a lookup through the tone reproduction curve (TRC). The result is treated as the achromatic component of the PCS.
PCSY = grayTRC[deviceGray]The inverse transform is done by converting the PCS Y components to device Gray via the inverse of the grayTRC.
- See Also:
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Field Summary
Fields declared in class java.awt.color.ICC_Profile
CLASS_ABSTRACT, CLASS_COLORSPACECONVERSION, CLASS_DEVICELINK, CLASS_DISPLAY, CLASS_INPUT, CLASS_NAMEDCOLOR, CLASS_OUTPUT, icAbsoluteColorimetric, icCurveCount, icCurveData, icHdrAttributes, icHdrCmmId, icHdrColorSpace, icHdrCreator, icHdrDate, icHdrDeviceClass, icHdrFlags, icHdrIlluminant, icHdrMagic, icHdrManufacturer, icHdrModel, icHdrPcs, icHdrPlatform, icHdrProfileID, icHdrRenderingIntent, icHdrSize, icHdrVersion, icICCAbsoluteColorimetric, icMediaRelativeColorimetric, icPerceptual, icRelativeColorimetric, icSaturation, icSigAbstractClass, icSigAToB0Tag, icSigAToB1Tag, icSigAToB2Tag, icSigBlueColorantTag, icSigBlueMatrixColumnTag, icSigBlueTRCTag, icSigBToA0Tag, icSigBToA1Tag, icSigBToA2Tag, icSigCalibrationDateTimeTag, icSigCharTargetTag, icSigChromaticAdaptationTag, icSigChromaticityTag, icSigCmyData, icSigCmykData, icSigColorantOrderTag, icSigColorantTableTag, icSigColorSpaceClass, icSigCopyrightTag, icSigCrdInfoTag, icSigDeviceMfgDescTag, icSigDeviceModelDescTag, icSigDeviceSettingsTag, icSigDisplayClass, icSigGamutTag, icSigGrayData, icSigGrayTRCTag, icSigGreenColorantTag, icSigGreenMatrixColumnTag, icSigGreenTRCTag, icSigHead, icSigHlsData, icSigHsvData, icSigInputClass, icSigLabData, icSigLinkClass, icSigLuminanceTag, icSigLuvData, icSigMeasurementTag, icSigMediaBlackPointTag, icSigMediaWhitePointTag, icSigNamedColor2Tag, icSigNamedColorClass, icSigOutputClass, icSigOutputResponseTag, icSigPreview0Tag, icSigPreview1Tag, icSigPreview2Tag, icSigProfileDescriptionTag, icSigProfileSequenceDescTag, icSigPs2CRD0Tag, icSigPs2CRD1Tag, icSigPs2CRD2Tag, icSigPs2CRD3Tag, icSigPs2CSATag, icSigPs2RenderingIntentTag, icSigRedColorantTag, icSigRedMatrixColumnTag, icSigRedTRCTag, icSigRgbData, icSigScreeningDescTag, icSigScreeningTag, icSigSpace2CLR, icSigSpace3CLR, icSigSpace4CLR, icSigSpace5CLR, icSigSpace6CLR, icSigSpace7CLR, icSigSpace8CLR, icSigSpace9CLR, icSigSpaceACLR, icSigSpaceBCLR, icSigSpaceCCLR, icSigSpaceDCLR, icSigSpaceECLR, icSigSpaceFCLR, icSigTechnologyTag, icSigUcrBgTag, icSigViewingCondDescTag, icSigViewingConditionsTag, icSigXYZData, icSigYCbCrData, icSigYxyData, icTagReserved, icTagType, icXYZNumberX -
Method Summary
Modifier and TypeMethodDescriptionfloatgetGamma()Returns a gamma value representing the tone reproduction curve (TRC).float[]Returns a float array of length 3 containing the X, Y, and Z components of the mediaWhitePointTag in the ICC profile.short[]getTRC()Returns the TRC as an array of shorts.Methods declared in class java.awt.color.ICC_Profile
finalize, getColorSpaceType, getData, getData, getInstance, getInstance, getInstance, getInstance, getMajorVersion, getMinorVersion, getNumComponents, getPCSType, getProfileClass, readResolve, setData, write, write
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Method Details
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getMediaWhitePoint
public float[] getMediaWhitePoint()Returns a float array of length 3 containing the X, Y, and Z components of the mediaWhitePointTag in the ICC profile.- Returns:
- an array containing the components of the mediaWhitePointTag in the ICC profile
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getGamma
public float getGamma()Returns a gamma value representing the tone reproduction curve (TRC). If the profile represents the TRC as a table rather than a single gamma value, then an exception is thrown. In this case the actual table can be obtained viagetTRC(). When using a gamma value, the PCS Y component is computed as follows:gamma PCSY = deviceGray
- Returns:
- the gamma value as a float
- Throws:
ProfileDataException- if the profile does not specify the TRC as a single gamma value
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getTRC
public short[] getTRC()Returns the TRC as an array of shorts. If the profile has specified the TRC as linear (gamma = 1.0) or as a simple gamma value, this method throws an exception, and thegetGamma()method should be used to get the gamma value. Otherwise the short array returned here represents a lookup table where the input Gray value is conceptually in the range [0.0, 1.0]. Value 0.0 maps to array index 0 and value 1.0 maps to array indexlength-1. Interpolation may be used to generate output values for input values which do not map exactly to an index in the array. Output values also map linearly to the range [0.0, 1.0]. Value 0.0 is represented by an array value of 0x0000 and value 1.0 by 0xFFFF, i.e. the values are really unsigned short values, although they are returned in a short array.- Returns:
- a short array representing the TRC
- Throws:
ProfileDataException- if the profile does not specify the TRC as a table
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