Examples of org.geotools.coverage.processing.OperationJAI.doOperation()

Package org.geotools.coverage.processing

Class org.geotools.coverage.processing.OperationJAI

Examples of org.geotools.coverage.processing.OperationJAI.doOperation()

org.geotools.coverage.processing.OperationJAI.doOperation()
Applies a process operation to a grid coverage. The default implementation performs the following steps:
1. Converts source grid coverages to their geophysics view using {@linkplain GridCoverage2D#geophysics GridCoverage2D.geophysics}(true). This allow to performs all computation on geophysics values instead of encoded samples. Note: this step is disabled if {@link #computeOnGeophysicsValues computeOnGeophysicsValues} returns{@code false}.
2. Ensures that every sources {@code GridCoverage2D}s use the same coordinate reference system (at least for the two-dimensional part) with the same {@link GridGeometry2D#getGridToCRS2D gridToCRS} relationship.
3. Invokes {@link #deriveGridCoverage}. The sources in the {@code ParameterBlock} are {@link RenderedImage} objectsobtained from {@link GridCoverage2D#getRenderedImage()}.
4. If a changes from non-geophysics to geophysics view were performed at step 1, converts the result back to the original view using {@linkplain GridCoverage2D#geophysics GridCoverage2D.geophysics}(false).
@param parameters List of name value pairs for the parameters required for the operation. @param hints A set of rendering hints, or {@code null} if none. @return The result as a grid coverage. @throws CoverageProcessingException if the operation can't be applied. @see #deriveGridCoverage


            final OperationJAI op = new OperationJAI("Histogram"); //$NON-NLS-1$
            ParameterValueGroup params = op.getParameters();
            params.parameter("Source").setValue(recoloredGridCoverage); //$NON-NLS-1$


            recoloredGridCoverage = (GridCoverage2D) op.doOperation(params, null);
            final Histogram h = (Histogram) recoloredGridCoverage.getProperty("histogram"); //$NON-NLS-1$


            Display.getDefault().asyncExec(new Runnable(){
                public void run() {
                    rgbViewer.updateHistograms(h.getBins());

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      params.parameter("rangesType").setValue(Range.Type.EXCLUDE); //$NON-NLS-1$
      params.parameter("rangeLocalStats").setValue(false); //$NON-NLS-1$
    }
    


    final GridCoverage2D coverage = (GridCoverage2D) op.doOperation(params,null);
    final ZonalStats zstats = (ZonalStats) coverage
        .getProperty(ZonalStatsDescriptor.ZONAL_STATS_PROPERTY);
    double min = zstats.statistic(Statistic.MIN).results().get(0).getValue();
    double max = zstats.statistic(Statistic.MAX).results().get(0).getValue();
    return new double[]{min,max};

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                    params.parameter("roi").setValue(roi);
                    params.parameter("ranges").setValue(inclusionRanges);
                    params.parameter("rangesType").setValue(rangesType);
                    params.parameter("rangeLocalStats").setValue(isLocal);


                    final GridCoverage2D coverage = (GridCoverage2D) op.doOperation(params, null);
                    final ZonalStats stats = (ZonalStats) coverage
                            .getProperty(ZonalStatsDescriptor.ZONAL_STATS_PROPERTY);
                    final Map<Statistic, List<Result>> statsMap = new HashMap<Statistic, List<Result>>();
                    for (Statistic statistic : statistis) {
                        final List<Range> inclRanges = CollectionFactory.list();

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