* Extracts the source grid coverages now as a List. The sources will be set in the ParameterBlockJAI (as RenderedImages) later.

         */

        final Collection<GridCoverage2D> sourceCollection = new ArrayList<GridCoverage2D>();

        // The ViewType is used in post processing

        // Selection of the first coverage

        GridCoverage2D coverage = sourceCollection.iterator().next();

        // CRS to use. The first CRS is used

        final CoordinateReferenceSystem crs = coverage.getCoordinateReferenceSystem2D();

        // Global bounding Box to use

        }

        // Collection of the sources to use

        Collection<GridCoverage2D> sourceCoverages = (Collection<GridCoverage2D>) srcCoverages;

        // ViewType object

        // Check if the operation must be computed on GeoPhysical values

        final boolean computeOnGeophysicsValues = computeOnGeophysicsValues(parameters);

        // Counter for the coverages

        int i = 0;

        // Cycle on all the Sources

         * next block.

         */

        final String[]     sourceNames = operation.getSourceNames();

        final GridCoverage2D[] sources = new GridCoverage2D[sourceNames.length];

        /*

         * Ensures that all coverages use the same CRS and has the same 'gridToCRS' relationship.

         * After the reprojection, the method still checks all CRS in case the user overridden the

         * {@link #resampleToCommonGeometry} method.

         */

 

        Utilities.ensureNonNull("sources",     sources);

        if (sources.length != sourceNames.length) {

            throw new IllegalArgumentException(Errors.format(ErrorKeys.MISMATCHED_ARRAY_LENGTH));

        }

        final boolean computeOnGeophysicsValues = computeOnGeophysicsValues(parameters);

        for (int i=0; i<sourceNames.length; i++) {

            Object candidate = parameters.parameter(sourceNames[i]).getValue();

            if (candidate == null) {

                // assume it is an optional parameter

    //

    // Do we need to explode the Palette to RGB(A)?

    //

    // /////////////////////////////////////////////////////////////////////

        sourceCoverage, interpolation, false, parameters.hints);

    switch (strategy) {

    case PHOTOGRAPHIC:

      // //

      //

         * If this condition is meets, then we verify if an "integer version" of the image

         * is available as a source of the source coverage (i.e. the floating-point image

         * is derived from the integer image, not the converse).

         */

                                        sourceCoverage, interpolation, false, hints);

        sourceCoverage = sourceCoverage.view(processingView);

        PlanarImage sourceImage = PlanarImage.wrapRenderedImage(sourceCoverage.getRenderedImage());

        assert sourceCoverage.getCoordinateReferenceSystem() == sourceCRS : sourceCoverage;

        // From this point, consider 'sourceCoverage' as final.

         * Extracts the source grid coverages now as a List. The sources will be set in the ParameterBlockJAI (as RenderedImages) later.

         */

        final Collection<GridCoverage2D> sourceCollection = new ArrayList<GridCoverage2D>();

        // The ViewType is used in post processing

        // Selection of the source number

        int numSources = sourceCollection.size();

        GridCoverage2D[] sources = new GridCoverage2D[numSources];

        // Creation of an array of GridCoverage2D from the input collection

        sourceCollection.toArray(sources);

        }

        // Collection of the sources to use

        Collection<GridCoverage2D> sourceCoverages = (Collection<GridCoverage2D>) srcCoverages;

        // ViewType object

        // Check if the operation must be computed on GeoPhysical values

        final boolean computeOnGeophysicsValues = computeOnGeophysicsValues(parameters);

        // Counter for the coverages

        int i = 0;

        // Cycle on all the Sources