Examples of javax.media.jai.LookupTableJAI

javax.media.jai.LookupTableJAI
A lookup table object associated with the "Lookup" operation. The "Lookup" operation is described in javax.media.jai.operator.LookupDescriptor.
This object represents a single- or multi-banded table of any JAI supported data type. A single- or multi-banded source image of integral data types is passed through the table and transformed into a single- or multi-banded destination image of either integral and floating point data types.
The table data may cover only a subrange of the legal range of the input data type. The subrange is selected by means of an offset parameter which is to be subtracted from the input value before indexing into the table array. When only a subranged table is used with a source image, it is up to the user to make certain that the source image does not have pixel values outside of the table range. Otherwise, an ArrayIndexOutOfBoundsException can occur.
The table data is saved by reference only. @see javax.media.jai.operator.LookupDescriptor

        ParameterBlock pb = new ParameterBlock();
        pb.addSource(img);
        String opName = null;
        if (isErrorDiffusion) {
            opName = "errordiffusion";
            LookupTableJAI lut = new LookupTableJAI(new byte[] {(byte)0x00, (byte)0xff});
            pb.add(lut);
            pb.add(KernelJAI.ERROR_FILTER_FLOYD_STEINBERG);
        } else {
            opName = "ordereddither";
            //Create the color cube.

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        ParameterBlock pb = new ParameterBlock();
        pb.addSource(img);
        String opName = null;
        if (isErrorDiffusion) {
            opName = "errordiffusion";
            LookupTableJAI lut = new LookupTableJAI(new byte[] {(byte)0x00, (byte)0xff});
            pb.add(lut);
            pb.add(KernelJAI.ERROR_FILTER_FLOYD_STEINBERG);
        } else {
            opName = "ordereddither";
            //Create the color cube.

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    /**
     * Called when the image colormap is changed
     */
    public void newColormap() {
        LookupTableJAI lutJAI = imageProcessor.getColorLookupTable();
        if (lutJAI != null) {
            lut = lutJAI.getByteData();
        } else {
            defaultColormap();
        }
        repaint();
    }

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            loadRawImage();
            correctedImage = null;
        }
        if ( correctedImage == null ) {
            createGammaLut();
            LookupTableJAI jailut = new LookupTableJAI( gammaLut );
            
            // TODO: Why setting color model as a rendering hint produces black image???
            correctedImage  = LookupDescriptor.createRenderable( wbAdjustedRawImage, jailut, null );
            
            // Store the color model of the image

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        }
    }
    
    private void applyGammaLut() {
        createGammaLut();
        LookupTableJAI jailut = new LookupTableJAI( gammaLut );
        if ( correctedImage != null ) {
            correctedImage.setParameter( jailut, 0 );
        }
    }

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     */
    protected void applyColorMapping() {
        if ( channelMap == null || colorCorrected == null ) {
            return;
        }
        LookupTableJAI jailut = createColorMappingLUT();
        colorCorrected.setParameter( jailut, 0 );
        if ( saturatedIhsImage != null ) {
            saturatedIhsImage.setParameter( createSaturationMappingLUT() , 0 );
        }

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        if ( valueCurve == null ) {
            // No color mapping found, use identity mapping
            valueCurve = new ColorCurve();
        }


        LookupTableJAI jailut = null;
        if ( componentSizes[0] == 8 ) {
            byte[][] lut = new byte[componentSizes.length][256];
            double dx = 1.0/256.0;
            for ( int band = 0 ; band < colorModel.getNumComponents() ; band++ ) {
                for ( int n = 0 ; n < lut[band].length; n++ ) {
                    double x = dx * n;
                    double val = x;
                    if ( band < componentCurves.length && componentCurves[band] != null ) {
                        val = componentCurves[band].getValue( val );
                    }
                    if ( band < applyValueCurve.length && applyValueCurve[band] ) {
                        val = valueCurve.getValue( val );
                    }
                    val = Math.max( 0.0, Math.min( val, 1.0 ) );
                    lut[band][n] = (byte) ((lut[band].length-1) * val);
                }
            }
            jailut = new LookupTableJAI( lut );
        } else if ( componentSizes[0] == 16 ) {
            short[][] lut = new short[componentSizes.length][0x10000];
            double dx = 1.0/65536.0;
            for ( int band = 0 ; band < colorModel.getNumComponents() ; band++ ) {
                for ( int n = 0 ; n < lut[band].length; n++ ) {
                    double x = dx * n;
                    double val = x;
                    if ( band < componentCurves.length && componentCurves[band] != null ) {
                        val = componentCurves[band].getValue( val );
                    }
                    if ( band < applyValueCurve.length && applyValueCurve[band] ) {
                        val = valueCurve.getValue( val );
                    }
                    val = Math.max( 0.0, Math.min( val, 1.0 ) );
                    lut[band][n] = (short) ((lut[band].length-1) * val);
                }
            }
            jailut = new LookupTableJAI( lut, true );
        } else {
            log.error( "Unsupported data type with with = " + componentSizes[0] );
        }
        return jailut;
    }

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        }
        if ( satCurve == null ) {
            satCurve = new ColorCurve();
        }
        
        LookupTableJAI jailut = null;
        if ( componentSizes[0] == 8 ) {
            byte[][] lut = new byte[componentSizes.length][256];
            double dx = 1.0/256.0;
            for ( int band = 0 ; band < componentSizes.length ; band++ ) {
                // Saturation
                for ( int n = 0 ; n < lut[band].length; n++ ) {
                    double x = dx * n;
                    double val = x;
                    if ( band == 2 ) {
                        val = satCurve.getValue( val );
                    }
                    val = Math.max( 0.0, Math.min( val, 1.0 ) );
                    lut[band][n] = (byte) ((lut[band].length-1) * val);
                }
            }
            
            jailut = new LookupTableJAI( lut );
        } else if ( componentSizes[0] == 16 ) {
            short[][] lut = new short[componentSizes.length][0x10000];
            double dx = 1.0/65536.0;
            for ( int band = 0 ; band < componentSizes.length ; band++ ) {
                for ( int n = 0 ; n < lut[band].length; n++ ) {
                    double x = dx * n;
                    double val = x;
                    if ( band == 2 ) {
                        val = satCurve.getValue( val );
                    }
                    val = Math.max( 0.0, Math.min( val, 1.0 ) );
                    lut[band][n] = (short) ((lut[band].length-1) * val);
                }
            }
            jailut = new LookupTableJAI( lut, true );
        } else {
            log.error( "Unsupported data type with with = " + componentSizes[0] );
        }
        return jailut;
    }

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     @param src Node to use as input for color correction.
     */
    
    protected RenderableOp getColorCorrected( RenderableOp src ) {
        // Initialize lookup table based on original image color model
        LookupTableJAI jailut = createColorMappingLUT();
        return LookupDescriptor.createRenderable( src, jailut, null );        
    }

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        RenderableOp ihsImage  = JAI.createRenderable("colorconvert", pb );
        ihsImage.setProperty( "org.photovault.opname", "color_corrected_ihs_image" );


//        saturatedIhsImage =
//                MultiplyConstDescriptor.createRenderable( ihsImage, new double[] {1.0, 1.0, saturation}, null );
        LookupTableJAI jailut = createSaturationMappingLUT();
        saturatedIhsImage = LookupDescriptor.createRenderable( ihsImage, jailut, null );
        
        pb = new ParameterBlock();
        pb.addSource(saturatedIhsImage);
        ColorSpace sRGB = ColorSpace.getInstance( ColorSpace.CS_sRGB );

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