Package org.apache.commons.imaging.formats.tiff.photometricinterpreters

Class PhotometricInterpreterLogLuv

java.lang.Object

org.apache.commons.imaging.formats.tiff.photometricinterpreters.AbstractPhotometricInterpreter

org.apache.commons.imaging.formats.tiff.photometricinterpreters.PhotometricInterpreterLogLuv

public class PhotometricInterpreterLogLuv
extends AbstractPhotometricInterpreter

Photometric interpretation Logluv support. Logluv is an encoding for storing data inside TIFF images.

See Also:

Logluv TIFF

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
(package private) static class	PhotometricInterpreterLogLuv.RgbValues	Rgb values (reg-green-blue, as R-G-B, as in the RGB color model).
(package private) static class	PhotometricInterpreterLogLuv.TristimulusValues	Tristimulus color values (red-green-blue, as X-Y-Z, in the CIE XYZ color space).

Field Summary

Fields inherited from class org.apache.commons.imaging.formats.tiff.photometricinterpreters.AbstractPhotometricInterpreter

height, predictor, samplesPerPixel, width

Constructor Summary

Constructors

Constructor	Description
PhotometricInterpreterLogLuv(int samplesPerPixel, int[] bitsPerSample, int predictor, int width, int height)

Method Summary

Modifier and Type	Method	Description
(package private) PhotometricInterpreterLogLuv.RgbValues	getRgbValues(PhotometricInterpreterLogLuv.TristimulusValues tristimulusValues)	Receives a triplet tristimulus values (CIE XYZ) and then does a CIELAB-CIEXYZ conversion (consult Wikipedia link for formula), where the CIELAB values are used to calculate the tristimulus values of the reference white point.
(package private) PhotometricInterpreterLogLuv.TristimulusValues	getTristimulusValues(int cieL, int cieA, int cieB)	Receives a triplet of CIELAB values, and calculates the tristimulus values.
void	interpretPixel(ImageBuilder imageBuilder, int[] samples, int x, int y)

Methods inherited from class org.apache.commons.imaging.formats.tiff.photometricinterpreters.AbstractPhotometricInterpreter

getBitsPerSample

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

PhotometricInterpreterLogLuv

public PhotometricInterpreterLogLuv(int samplesPerPixel,
                                    int[] bitsPerSample,
                                    int predictor,
                                    int width,
                                    int height)

Method Detail

getRgbValues

PhotometricInterpreterLogLuv.RgbValues getRgbValues(PhotometricInterpreterLogLuv.TristimulusValues tristimulusValues)

Receives a triplet tristimulus values (CIE XYZ) and then does a CIELAB-CIEXYZ conversion (consult Wikipedia link for formula), where the CIELAB values are used to calculate the tristimulus values of the reference white point.

Parameters:

tristimulusValues - the XYZ tristimulus values

Returns:

RGB values

See Also:

CIELAB color space

getTristimulusValues

PhotometricInterpreterLogLuv.TristimulusValues getTristimulusValues(int cieL,
                                                                    int cieA,
                                                                    int cieB)

Receives a triplet of CIELAB values, and calculates the tristimulus values. The reference white point used here is the equivalent to summer sun and sky.

Parameters:

cieL - lightness from black to white

cieA - lightness from green to red

cieB - lightness from blue to yellow

Returns:

tristimulus (X, Y, and Z) values

See Also:

CIELAB color space, White point

interpretPixel

public void interpretPixel(ImageBuilder imageBuilder,
                           int[] samples,
                           int x,
                           int y)
                    throws ImagingException,
                           java.io.IOException

Specified by:

interpretPixel in class AbstractPhotometricInterpreter

Throws:

ImagingException

java.io.IOException